# Toolisco

> Free online tools for images, PDFs, developers, SEO, text, security, calculators and more. All processing happens locally in the browser using native APIs (FileReader, Canvas, Clipboard, Web Crypto) — nothing is uploaded to a server, and no account is required.

Toolisco is a no-framework, vanilla HTML/CSS/JS + PHP platform offering a broad toolkit: image editing and conversion, PDF utilities, developer and encoding tools, text utilities, security generators, SEO meta builders, and CSS generators. Privacy is structural: there is no upload step and no server-side processing of user file contents.

## Core pages

- [Home](https://www.toolisco.com/): Overview of the toolkit, supported formats, tool categories, and how local-first conversion works.
- [Tools](https://www.toolisco.com/tools): Catalog of all Base64 tools, grouped by category.
- [Developer Hub](https://www.toolisco.com/developer): Reference on data URIs, embedding images in CSS, and standard vs URL-safe Base64 alphabets.
- [Resources](https://www.toolisco.com/resources): Guides, supported formats, and how-it-works reference material.
- [Knowledge Hub](https://www.toolisco.com/knowledge): Category overviews, evergreen guides, and a glossary explaining the concepts behind the tools.
- [Glossary](https://www.toolisco.com/glossary): Plain-language definitions of formats, tags, and terms such as JSON, Base64, hreflang, JWT, and MIME types.
- [Blog](https://www.toolisco.com/blog): Articles and guides on Base64 encoding concepts and practical use.

## Tools

All tools run entirely in the browser; no data is uploaded.

- [Image to Base64](https://www.toolisco.com/tools/image-to-base64): Encode PNG, JPG, WebP, GIF, SVG, BMP, ICO, and AVIF images to Base64 or a data URI via drag-drop, browse, or paste.
- [Base64 to Image](https://www.toolisco.com/tools/base64-to-image): Decode a Base64 string or data URI to a previewable, downloadable image with MIME auto-detection.
- [Text to Base64](https://www.toolisco.com/tools/text-to-base64): Encode plain text and Unicode to Base64 live, UTF-8 safe.
- [Base64 to Text](https://www.toolisco.com/tools/base64-to-text): Decode Base64 back to readable UTF-8 text with validation.
- [Image URL to Base64](https://www.toolisco.com/tools/image-url-to-base64): Fetch an image by URL and convert it to Base64, with graceful CORS handling.
- [Data URI Generator](https://www.toolisco.com/tools/data-uri-generator): Turn an image into a ready-to-paste data URI plus HTML and CSS snippets.
- [Remove Data URI Prefix](https://www.toolisco.com/tools/remove-data-uri-prefix): Strip the data: prefix from a data URI to get the raw Base64 payload.
- [Add Data URI Prefix](https://www.toolisco.com/tools/add-data-uri-prefix): Wrap raw Base64 in a valid data URI with an auto-detected MIME type.
- [Base64 Validator](https://www.toolisco.com/tools/base64-validator): Validate characters, padding, length, and decodability of a Base64 string or data URI.
- [Base64 Analyzer](https://www.toolisco.com/tools/base64-analyzer): Inspect size, overhead, MIME, dimensions, decoded estimate, and more.

## Image processing tools

All image processing runs entirely in the browser via the Canvas API; no uploads.

- [Image Resizer](https://www.toolisco.com/tools/image-resize): Resize by pixels or percentage with aspect lock, standard presets, and social-media sizes.
- [Image Compressor](https://www.toolisco.com/tools/image-compress): Reduce JPG, PNG, and WebP file size with a live quality slider and before/after readout.
- [Image Cropper](https://www.toolisco.com/tools/image-crop): Crop freely or to fixed ratios (1:1, 16:9, 4:3, 3:2) with a draggable overlay.
- [Image Rotator](https://www.toolisco.com/tools/image-rotate): Rotate by 90, 180, 270 degrees or any custom angle with a live preview.
- [Image Flipper](https://www.toolisco.com/tools/image-flip): Mirror an image horizontally and/or vertically.
- [Image Format Converter](https://www.toolisco.com/tools/image-format-converter): Convert between PNG, JPG, WebP, BMP, and more, with quality control where supported.
- [Image Quality Optimizer](https://www.toolisco.com/tools/image-optimizer): Balance quality and size, including an automatic target-file-size search.
- [Before / After Compare](https://www.toolisco.com/tools/image-compare): Compare original and processed images with a draggable slider and size difference.
- [Bulk Image Processor](https://www.toolisco.com/tools/bulk-image-processor): Queue many images, resize/compress/convert them all, and download a ZIP.
- [JPG to PNG Converter](https://www.toolisco.com/tools/jpg-to-png): Convert JPG/JPEG to lossless PNG.
- [PNG to JPG Converter](https://www.toolisco.com/tools/png-to-jpg): Convert PNG to JPG with a chosen background colour for transparency.
- [WebP to JPG Converter](https://www.toolisco.com/tools/webp-to-jpg): Convert WebP to high-quality JPG.
- [JPG to WebP Converter](https://www.toolisco.com/tools/jpg-to-webp): Convert JPG/JPEG to compact WebP with a quality slider.
- [PNG to WebP Converter](https://www.toolisco.com/tools/png-to-webp): Convert PNG to WebP with transparency and quality control.
- [WebP to PNG Converter](https://www.toolisco.com/tools/webp-to-png): Convert WebP to lossless PNG with transparency.
- [AVIF Converter](https://www.toolisco.com/tools/avif-converter): Convert AVIF to PNG/JPG, and encode PNG/JPG to AVIF where supported.
- [SVG Converter](https://www.toolisco.com/tools/svg-converter): Rasterize SVG to PNG, JPG, or WebP at any scale.
- [ICO Generator](https://www.toolisco.com/tools/ico-generator): Build a multi-size .ico file (16-256 px) from any image.
- [Favicon Generator](https://www.toolisco.com/tools/favicon-generator): Generate a full favicon package (ICO, PNGs, Apple/Android, manifest) as a ZIP.
- [Watermark Image](https://www.toolisco.com/tools/watermark-image): Add a text or logo watermark with opacity, rotation, scale, position, and tiling.
- [Add Text to Image](https://www.toolisco.com/tools/add-text-to-image): Add styled text with fonts, colour, stroke, shadow, alignment, and rotation.
- [Meme Generator](https://www.toolisco.com/tools/meme-generator): Add top and bottom captions in the classic Impact meme style.
- [Blur Image](https://www.toolisco.com/tools/blur-image): Apply an adjustable Gaussian blur with undo, redo, and download.
- [Pixelate Image](https://www.toolisco.com/tools/pixelate-image): Pixelate an image with an adjustable pixel size, undo, and redo.
- [Sharpen Image](https://www.toolisco.com/tools/sharpen-image): Sharpen an image with adjustable intensity and live preview.
- [Brightness Adjuster](https://www.toolisco.com/tools/brightness-adjuster): Adjust brightness with a live slider, undo, and redo.
- [Contrast Adjuster](https://www.toolisco.com/tools/contrast-adjuster): Adjust contrast with a live slider, undo, and redo.
- [Image Splitter](https://www.toolisco.com/tools/image-splitter): Split an image into a grid of parts and download them as a ZIP.
- [Image Merger](https://www.toolisco.com/tools/image-merger): Merge images horizontally, vertically, or in a grid with spacing and a background.

## PDF toolkit

- [Image to PDF](https://www.toolisco.com/tools/image-to-pdf): Combine images into a single PDF with page size, orientation, and margins.
- [Merge PDF](https://www.toolisco.com/tools/merge-pdf): Merge multiple PDF files into one, reorder them first, then download.
- [Split PDF](https://www.toolisco.com/tools/split-pdf): Split a PDF by every page, a custom range, or selected pages; download as a ZIP.
- [Rotate PDF](https://www.toolisco.com/tools/rotate-pdf): Rotate all or selected pages by 90, 180, or 270 degrees.
- [Extract Images from PDF](https://www.toolisco.com/tools/extract-images-from-pdf): Extract embedded raster images and download individually or as a ZIP.
- [Delete PDF Pages](https://www.toolisco.com/tools/delete-pdf-pages): Remove pages with a thumbnail view, undo before export, and download a new PDF.
- [Reorder PDF Pages](https://www.toolisco.com/tools/reorder-pdf-pages): Drag page thumbnails to reorder, reverse, or restore, then download.
- [PDF Viewer](https://www.toolisco.com/tools/pdf-viewer): View a PDF with zoom, fit, rotate, navigation, thumbnails, search, and fullscreen.
- [PDF Compressor](https://www.toolisco.com/tools/pdf-compressor): Optimize and shrink a PDF in the browser with honest size and saving estimates.
- [Organize PDF](https://www.toolisco.com/tools/organize-pdf): Rotate, delete, and reorder pages in one workspace, then export the final PDF.

## Social media toolkit

- [Instagram Post Resizer](https://www.toolisco.com/tools/instagram-post-resizer): Resize and crop images to Instagram post sizes with guides and filters.
- [Instagram Story Resizer](https://www.toolisco.com/tools/instagram-story-resizer): Resize images to 1080×1920 stories with safe-area guides.
- [Instagram Reel Cover Maker](https://www.toolisco.com/tools/instagram-reel-cover-maker): Make a 1080×1920 reel cover with framing and guides.
- [Facebook Cover Maker](https://www.toolisco.com/tools/facebook-cover-maker): Create a Facebook cover photo with safe-area guides.
- [Facebook Post Resizer](https://www.toolisco.com/tools/facebook-post-resizer): Resize images for Facebook posts with crop and background.
- [X (Twitter) Header Maker](https://www.toolisco.com/tools/x-twitter-header-maker): Make a 1500×500 X header with safe-area guides.
- [LinkedIn Banner Maker](https://www.toolisco.com/tools/linkedin-banner-maker): Create a 1584×396 LinkedIn profile banner.
- [LinkedIn Post Maker](https://www.toolisco.com/tools/linkedin-post-maker): Resize images for LinkedIn posts with crop and background.
- [Pinterest Pin Maker](https://www.toolisco.com/tools/pinterest-pin-maker): Make a 1000×1500 Pinterest pin with framing and filters.
- [YouTube Thumbnail Maker](https://www.toolisco.com/tools/youtube-thumbnail-maker): Create a 1280×720 thumbnail with guides, border, and filters.
- [WhatsApp DP Maker](https://www.toolisco.com/tools/whatsapp-dp-maker): Make a circular WhatsApp profile photo with framing.
- [Telegram Profile Photo Maker](https://www.toolisco.com/tools/telegram-profile-photo-maker): Make a circular Telegram profile photo.

## Passport & government photo toolkit

- [Passport Photo Maker](https://www.toolisco.com/tools/passport-photo-maker): Make passport photos to country specs with background and a printable sheet.
- [Visa Photo Maker](https://www.toolisco.com/tools/visa-photo-maker): Make visa photos to common standards with head-size guides and a print sheet.
- [Aadhaar Photo Resizer](https://www.toolisco.com/tools/aadhaar-photo-resizer): Resize a photo to Aadhaar requirements on a white background.
- [PAN Card Photo Resizer](https://www.toolisco.com/tools/pan-card-photo-resizer): Resize a photo to PAN card application requirements.
- [Signature Resizer](https://www.toolisco.com/tools/signature-resizer): Resize and clean a signature with background and ink adjustments.
- [Photo to 20KB](https://www.toolisco.com/tools/photo-to-20kb): Compress a photo to a target file size at the best possible quality.
- [Signature to 20KB](https://www.toolisco.com/tools/signature-to-20kb): Compress a signature to a target size with ink colour options.
- [Government Exam Photo Compressor](https://www.toolisco.com/tools/government-exam-photo-compressor): Compress photos/signatures to exam sizes (20–200KB).

## Text utilities toolkit

- [Reading Time Calculator](https://www.toolisco.com/tools/reading-time-calculator): Estimate reading time, speaking time, and pages with a custom WPM.
- [Remove Duplicate Lines](https://www.toolisco.com/tools/remove-duplicate-lines): Remove duplicate lines with case options and optional sorting.
- [Sort Lines](https://www.toolisco.com/tools/sort-lines): Sort lines alphabetically, numerically, naturally, or randomly.
- [Reverse Text](https://www.toolisco.com/tools/reverse-text): Reverse characters, words, sentences, lines, or paragraphs.
- [Random Text Generator](https://www.toolisco.com/tools/random-text-generator): Generate random letters, words, sentences, or paragraphs.
- [Binary Converter](https://www.toolisco.com/tools/binary-converter): Convert between text, binary, decimal, and hex in both directions.
- [ASCII Converter](https://www.toolisco.com/tools/ascii-converter): Convert text to ASCII codes and back, with a reference table.
- [Morse Code Converter](https://www.toolisco.com/tools/morse-code-converter): Convert text to Morse and back, with audio beep playback.
- [Find & Replace](https://www.toolisco.com/tools/find-and-replace): Find and replace with regex, case, and whole-word options.
- [Text Cleaner](https://www.toolisco.com/tools/text-cleaner): Remove empty lines, trim spaces, normalize endings and Unicode.
- [Remove Extra Spaces](https://www.toolisco.com/tools/remove-extra-spaces): Collapse multiple spaces and trim, keeping words and lines intact.
- [Line Counter](https://www.toolisco.com/tools/line-counter): Count total, empty, and non-empty lines with length stats.
- [Text Splitter](https://www.toolisco.com/tools/text-splitter): Split text by characters, words, lines, or a delimiter; download parts.

## Security toolkit

- [bcrypt Generator](https://www.toolisco.com/tools/bcrypt-generator): Hash passwords with bcrypt at a custom cost factor, with verify and timing.
- [Random String Generator](https://www.toolisco.com/tools/random-string-generator): Secure random strings — alpha, numeric, hex, Base64, or custom.
- [Random Number Generator](https://www.toolisco.com/tools/random-number-generator): Secure random numbers with range, integer/decimal, and unique values.
- [Secure Token Generator](https://www.toolisco.com/tools/secure-token-generator): Secure tokens — 16/32/64/128 bytes as hex, Base64, or URL-safe.
- [Password Entropy Calculator](https://www.toolisco.com/tools/password-entropy-calculator): Entropy, strength, crack time, character pool, and suggestions.
- [Password Hash Identifier](https://www.toolisco.com/tools/password-hash-identifier): Identify likely hash algorithms with confidence levels.
- [Secure Passphrase Generator](https://www.toolisco.com/tools/secure-passphrase-generator): Memorable 3–10 word passphrases with entropy readout.
- [Random Hex Generator](https://www.toolisco.com/tools/random-hex-generator): Custom-length hexadecimal strings from a secure source.
- [Random Byte Generator](https://www.toolisco.com/tools/random-byte-generator): Secure random bytes as hex, binary, Base64, or decimal.
- [Secure PIN Generator](https://www.toolisco.com/tools/secure-pin-generator): Secure 4/6/8-digit or custom PINs, optionally with no repeats.

## SEO & web utilities

- [Meta Tag Generator](https://www.toolisco.com/tools/meta-tag-generator): Generate SEO meta tags with a live search-result preview.
- [Open Graph Generator](https://www.toolisco.com/tools/open-graph-generator): Generate Open Graph tags with a live share-card preview.
- [Twitter Card Generator](https://www.toolisco.com/tools/twitter-card-generator): Generate Twitter Card tags for summary, large image, player, and app.
- [hreflang Generator](https://www.toolisco.com/tools/hreflang-generator): Generate hreflang link tags with x-default and validation.
- [Website Screenshot Generator](https://www.toolisco.com/tools/website-screenshot-generator): Render your own HTML to a PNG in the browser.
- [HTML Table Generator](https://www.toolisco.com/tools/html-table-generator): Build a framework-free HTML table with header, footer, and alignment.
- [CSS Button Generator](https://www.toolisco.com/tools/css-button-generator): Design a CSS button with gradient, shadow, hover, and animation.
- [CSS Box Shadow Generator](https://www.toolisco.com/tools/css-box-shadow-generator): Build layered CSS box-shadows with a live preview.
- [CSS Border Radius Generator](https://www.toolisco.com/tools/css-border-radius-generator): Build CSS border-radius with linked or elliptical corners.
- [CSS Clip Path Generator](https://www.toolisco.com/tools/css-clip-path-generator): Build CSS clip-path shapes — circle, ellipse, polygon, inset.

## Code generators

Each generator produces ready-to-paste code from an image (as a data URI), entirely in the browser.

- [HTML Image Generator](https://www.toolisco.com/tools/html-image-generator): Build an <img> tag with alt, dimensions, lazy loading, decoding, class, and id.
- [CSS Background Generator](https://www.toolisco.com/tools/css-background-generator): Build a background rule with size, repeat, position, attachment, origin, and clip.
- [Markdown Image Generator](https://www.toolisco.com/tools/markdown-image-generator): Inline or reference-style Markdown image syntax with alt and title.
- [JSON Image Generator](https://www.toolisco.com/tools/json-image-generator): Pretty or minified JSON object with data URI, MIME, dimensions, and metadata.
- [XML Image Generator](https://www.toolisco.com/tools/xml-image-generator): Well-formed XML document with metadata and CDATA-wrapped Base64.
- [React JSX Generator](https://www.toolisco.com/tools/react-jsx-generator): React function component with props, lazy loading, responsive, and TypeScript option.
- [Vue Component Generator](https://www.toolisco.com/tools/vue-component-generator): Vue 3 single-file component with props, alt, and lazy loading.
- [Angular Image Generator](https://www.toolisco.com/tools/angular-image-generator): Angular standalone component with bindings and accessible attributes.
- [Next.js Image Generator](https://www.toolisco.com/tools/nextjs-image-generator): next/image component with width, height, priority, placeholder, and responsive sizes.
- [Email HTML Generator](https://www.toolisco.com/tools/email-html-generator): Email-safe, table-based HTML with inline styles and Outlook-friendly markup.
- [SVG Embed Generator](https://www.toolisco.com/tools/svg-embed-generator): Five embed methods — inline, object, embed, img, and CSS background.
- [Image Embed Playground](https://www.toolisco.com/tools/image-embed-playground): Live HTML/CSS sandbox with dark-mode preview.

## Developer utilities

- [Base64 Length Calculator](https://www.toolisco.com/tools/base64-length-calculator): Exact encoded length for any input size, including padding and wrapping.
- [Decoded Size Estimator](https://www.toolisco.com/tools/decoded-size-estimator): Estimate decoded byte size from a Base64 string or its length.
- [Encoding Speed Meter](https://www.toolisco.com/tools/encoding-speed-meter): Benchmark browser Base64 encode/decode throughput.
- [Character Counter](https://www.toolisco.com/tools/character-counter): Count characters, bytes, words, and lines with a Base64-validity check.
- [Line Wrap Tool](https://www.toolisco.com/tools/line-wrap-tool): Wrap Base64 to MIME 76, PEM 64, or a custom width.
- [Line Unwrap Tool](https://www.toolisco.com/tools/line-unwrap-tool): Collapse wrapped Base64 back into a single line.
- [Base64 Normalizer](https://www.toolisco.com/tools/base64-normalizer): Convert between standard and URL-safe alphabets and fix or strip padding.
- [Whitespace Remover](https://www.toolisco.com/tools/whitespace-remover): Remove spaces, tabs, and newlines, or collapse them.
- [Data URI Inspector](https://www.toolisco.com/tools/data-uri-inspector): Break a data URI into scheme, MIME, charset, encoding, and payload.

## Formatters & validators

All run in the browser with no uploads, using a built-in code editor with copy, download, and autosave.

- [JSON Formatter](https://www.toolisco.com/tools/json-formatter): Beautify, validate, and explore JSON with a collapsible tree view.
- [JSON Minifier](https://www.toolisco.com/tools/json-minifier): Compress JSON to a single line, with validation.
- [JSON Validator](https://www.toolisco.com/tools/json-validator): Validate JSON and pinpoint errors by line and column.
- [HTML Formatter](https://www.toolisco.com/tools/html-formatter): Beautify or minify HTML with a live preview.
- [HTML Minifier](https://www.toolisco.com/tools/html-minifier): Strip comments and collapse whitespace in HTML.
- [CSS Formatter](https://www.toolisco.com/tools/css-formatter): Beautify CSS with clean indentation.
- [CSS Minifier](https://www.toolisco.com/tools/css-minifier): Remove comments and whitespace from CSS.
- [JavaScript Beautifier](https://www.toolisco.com/tools/javascript-beautifier): Format JavaScript safely, string- and comment-aware.
- [JavaScript Minifier](https://www.toolisco.com/tools/javascript-minifier): Strip comments and whitespace from JavaScript safely.
- [XML Formatter](https://www.toolisco.com/tools/xml-formatter): Beautify, minify, and validate XML.
- [XML Validator](https://www.toolisco.com/tools/xml-validator): Check XML for well-formedness.

## Encoders & escaping

- [URL Encoder](https://www.toolisco.com/tools/url-encoder): Percent-encode text for URLs and query strings.
- [URL Decoder](https://www.toolisco.com/tools/url-decoder): Decode percent-encoded URLs back to text.
- [Unicode Encoder](https://www.toolisco.com/tools/unicode-encoder): Convert text to \uXXXX escape sequences.
- [Unicode Decoder](https://www.toolisco.com/tools/unicode-decoder): Convert \uXXXX escapes back to text.
- [Escape HTML](https://www.toolisco.com/tools/html-escape): Escape HTML special characters into entities.
- [Unescape HTML](https://www.toolisco.com/tools/html-unescape): Convert HTML entities back to characters.

## Text utilities

- [Text Diff Viewer](https://www.toolisco.com/tools/text-diff-viewer): Compare two texts inline or side-by-side with highlights.
- [Case Converter](https://www.toolisco.com/tools/case-converter): Convert between upper, lower, title, camel, pascal, snake, and kebab case.
- [Slug Generator](https://www.toolisco.com/tools/slug-generator): Turn text into a URL-friendly slug.
- [Line Tools](https://www.toolisco.com/tools/line-tools): Sort, reverse, deduplicate, and remove empty lines.
- [Word Counter](https://www.toolisco.com/tools/word-counter): Count words, characters, sentences, and reading time.

## Generators

- [UUID Generator](https://www.toolisco.com/tools/uuid-generator): Generate one or many v4 UUIDs with history.
- [Timestamp Converter](https://www.toolisco.com/tools/timestamp-converter): Convert between Unix, milliseconds, and human dates.
- [Random Generator](https://www.toolisco.com/tools/random-generator): Random strings, passwords, numbers, hex, colors, Base64, and bytes.
- [Lorem Ipsum Generator](https://www.toolisco.com/tools/lorem-ipsum-generator): Placeholder text by words, sentences, or paragraphs.

## Hashing & checksums

- [MD5 Hash Generator](https://www.toolisco.com/tools/md5-hash-generator): MD5 hash from text or a file, computed locally.
- [SHA-1 Hash Generator](https://www.toolisco.com/tools/sha1-hash-generator): SHA-1 hash via the Web Crypto API.
- [SHA-256 Hash Generator](https://www.toolisco.com/tools/sha256-hash-generator): SHA-256 hash via the Web Crypto API.
- [SHA-384 Hash Generator](https://www.toolisco.com/tools/sha384-hash-generator): SHA-384 hash via the Web Crypto API.
- [SHA-512 Hash Generator](https://www.toolisco.com/tools/sha512-hash-generator): SHA-512 hash via the Web Crypto API.
- [HMAC Generator](https://www.toolisco.com/tools/hmac-generator): Keyed HMAC signatures with SHA-1/256/384/512.
- [CRC32 Generator](https://www.toolisco.com/tools/crc32-generator): CRC32 checksum from text or a file.
- [File Hash Calculator](https://www.toolisco.com/tools/file-hash-calculator): MD5, SHA-1, SHA-256, SHA-384, and SHA-512 for multiple files with a downloadable report.

## Security & tokens

- [Password Generator](https://www.toolisco.com/tools/password-generator): Strong, custom, or pronounceable passwords from a secure random source.
- [Password Strength Checker](https://www.toolisco.com/tools/password-strength-checker): Strength, entropy, and estimated crack time with weak-pattern detection.
- [JWT Decoder](https://www.toolisco.com/tools/jwt-decoder): Decode a JWT header, payload, and signature without verification.
- [JWT Inspector](https://www.toolisco.com/tools/jwt-inspector): Decoded claims with readable timestamps and expiry warnings.
- [JWT Viewer](https://www.toolisco.com/tools/jwt-viewer): Pretty-printed JWT header and payload side by side.

## Web & file utilities

- [URL Parser](https://www.toolisco.com/tools/url-parser): Break a URL into protocol, host, port, path, query, hash, and parameters.
- [MIME Type Detector](https://www.toolisco.com/tools/mime-type-detector): Detect a file's MIME type from its content signature.
- [YAML Formatter](https://www.toolisco.com/tools/yaml-formatter): Format, re-indent, and validate YAML with clear parse errors.
- [CSV to JSON](https://www.toolisco.com/tools/csv-to-json): Convert CSV to JSON with delimiter choice, header detection, and type inference.
- [JSON to CSV](https://www.toolisco.com/tools/json-to-csv): Convert a JSON array to CSV with automatic headers and nested-key flattening.
- [SQL Formatter](https://www.toolisco.com/tools/sql-formatter): Beautify and indent SQL with keyword casing options and preserved comments.
- [Regex Tester](https://www.toolisco.com/tools/regex-tester): Test regular expressions with flags, live match highlighting, capture groups, and replace mode.
- [Cron Expression Generator](https://www.toolisco.com/tools/cron-expression-generator): Build cron expressions with a field builder, presets, and a plain-English explanation.
- [Markdown Preview](https://www.toolisco.com/tools/markdown-preview): Write Markdown and see a live rendered preview with tables, code, and lists.
- [Markdown to HTML](https://www.toolisco.com/tools/markdown-to-html): Convert Markdown to clean, escaped HTML you can copy or download.
- [HTTP Header Parser](https://www.toolisco.com/tools/http-header-parser): Parse raw HTTP headers into name/value pairs with duplicate and invalid-line detection.
- [User-Agent Parser](https://www.toolisco.com/tools/user-agent-parser): Parse a User-Agent into browser, version, engine, OS, device, and CPU.
- [EXIF Metadata Viewer](https://www.toolisco.com/tools/exif-metadata-viewer): View camera, exposure, date, and GPS metadata in a JPEG.
- [Image Metadata Remover](https://www.toolisco.com/tools/image-metadata-remover): Strip EXIF and GPS metadata by re-encoding an image locally.

## Color tools

- [Color Picker](https://www.toolisco.com/tools/color-picker): Pick a color and read HEX, RGB, HSL, and CMYK.
- [HEX to RGB Converter](https://www.toolisco.com/tools/hex-rgb-converter): Convert between HEX and RGB both ways.
- [HEX to HSL Converter](https://www.toolisco.com/tools/hex-hsl-converter): Convert between HEX and HSL both ways.
- [HEX to CMYK Converter](https://www.toolisco.com/tools/hex-cmyk-converter): Convert between HEX and CMYK both ways.
- [Gradient Generator](https://www.toolisco.com/tools/gradient-generator): Build CSS linear and radial gradients with copyable code.
- [Random Color Generator](https://www.toolisco.com/tools/random-color-generator): Random colors with HEX, RGB, and HSL values.
- [Palette Generator](https://www.toolisco.com/tools/palette-generator): Harmonious palettes from a base color.
- [Contrast Checker](https://www.toolisco.com/tools/contrast-checker): WCAG AA/AAA contrast ratios for accessible text.

## QR & barcodes

- [QR Code Generator](https://www.toolisco.com/tools/qr-code-generator): QR codes for text, URL, email, phone, SMS, WiFi, and vCard with PNG/SVG download.
- [QR Code Reader](https://www.toolisco.com/tools/qr-code-reader): Decode a QR code from an uploaded or pasted image.
- [Barcode Generator](https://www.toolisco.com/tools/barcode-generator): Code 128, EAN-13, and UPC-A barcodes with PNG/SVG download.
- [Barcode Reader](https://www.toolisco.com/tools/barcode-reader): Decode EAN-13 and UPC-A barcodes from an image.

## Calculators & converters

Finance, health, math, and unit calculators with formulas verified against standard references. All run offline in the browser.

- [Age Calculator](https://www.toolisco.com/tools/age-calculator): Exact age in years, months, and days from a birth date, with leap-year accuracy and next birthday.
- [Percentage Calculator](https://www.toolisco.com/tools/percentage-calculator): Find a percentage of a number and what percent one value is of another.
- [Percentage Change Calculator](https://www.toolisco.com/tools/percentage-change-calculator): Percentage increase or decrease between an old and a new value.
- [Ratio Calculator](https://www.toolisco.com/tools/ratio-calculator): Simplify ratios to lowest terms and solve proportions for a missing value.
- [Average Calculator](https://www.toolisco.com/tools/average-calculator): Mean, median, mode, sum, and range of a list of numbers.
- [Scientific Calculator](https://www.toolisco.com/tools/scientific-calculator): Trig, logarithms, powers, roots, and factorials with correct operator precedence and DEG/RAD modes.
- [BMI Calculator](https://www.toolisco.com/tools/bmi-calculator): Body Mass Index in metric or imperial units with the WHO category.
- [BMR & Calorie Calculator](https://www.toolisco.com/tools/bmr-calculator): Basal metabolic rate and daily calories via the Mifflin-St Jeor equation.
- [Loan EMI Calculator](https://www.toolisco.com/tools/loan-emi-calculator): Monthly EMI, total interest, and total payment from principal, rate, and tenure.
- [Simple Interest Calculator](https://www.toolisco.com/tools/simple-interest-calculator): Simple interest and maturity amount from principal, rate, and time.
- [Compound Interest Calculator](https://www.toolisco.com/tools/compound-interest-calculator): Compound interest and future value with adjustable compounding frequency.
- [GST Calculator](https://www.toolisco.com/tools/gst-calculator): Add or remove GST/VAT with inclusive and reverse modes.
- [Discount Calculator](https://www.toolisco.com/tools/discount-calculator): Sale price and amount saved from an original price and discount percentage.
- [Profit & Loss Calculator](https://www.toolisco.com/tools/profit-loss-calculator): Profit or loss and margin percentage from cost and selling price.
- [Length Converter](https://www.toolisco.com/tools/length-converter): Metres, kilometres, miles, feet, inches, yards, and more.
- [Weight Converter](https://www.toolisco.com/tools/weight-converter): Kilograms, grams, pounds, ounces, stones, and tonnes.
- [Temperature Converter](https://www.toolisco.com/tools/temperature-converter): Celsius, Fahrenheit, and Kelvin with exact formulas.
- [Area Converter](https://www.toolisco.com/tools/area-converter): Square metres, square feet, acres, hectares, and more.
- [Volume Converter](https://www.toolisco.com/tools/volume-converter): Litres, millilitres, gallons, cups, pints, and cubic metres.
- [Speed Converter](https://www.toolisco.com/tools/speed-converter): km/h, mph, m/s, knots, and feet per second.
- [Data Storage Converter](https://www.toolisco.com/tools/data-storage-converter): Bytes, KB, MB, GB, TB in decimal or binary units.
- [Time Converter](https://www.toolisco.com/tools/time-converter): Seconds, minutes, hours, days, weeks, months, and years.

## Knowledge Hub

Educational category pages, evergreen guides, and a glossary that explain the concepts behind the tools. Non-promotional reference content.

### Category guides

- [Image Tools](https://www.toolisco.com/knowledge-category?cat=image): Convert, compress, resize, and inspect images without uploading them.
- [PDF Tools](https://www.toolisco.com/knowledge-category?cat=pdf): Merge, split, rotate, and build PDFs entirely in the browser.
- [Developer Tools](https://www.toolisco.com/knowledge-category?cat=developer): Encode, format, generate, and inspect — copy-ready output for your stack.
- [Text Tools](https://www.toolisco.com/knowledge-category?cat=text): Transform, count, encode, and clean up text in one place.
- [SEO Tools](https://www.toolisco.com/knowledge-category?cat=seo): Generate the tags and markup that help pages present well.
- [Security Tools](https://www.toolisco.com/knowledge-category?cat=security): Generate passwords and tokens, hash data, and inspect credentials.
- [Social Media Tools](https://www.toolisco.com/knowledge-category?cat=social): Resize and prepare images for every platform and placement.
- [Government Photo Tools](https://www.toolisco.com/knowledge-category?cat=govphoto): Prepare passport, visa, and ID photos to common specifications.

### Guides

- [How to Compress Images Without Losing Quality](https://www.toolisco.com/guide?slug=compress-images-without-losing-quality): A practical look at where image file size comes from and how to cut it while keeping pictures sharp.
- [JPG vs PNG vs WebP vs AVIF](https://www.toolisco.com/guide?slug=jpg-vs-png-vs-webp-vs-avif): How the four common web image formats differ, and how to choose the right one for each job.
- [How PDF Compression Works](https://www.toolisco.com/guide?slug=how-pdf-compression-works): What actually happens inside a PDF when you compress it, and why images are usually the deciding factor.
- [Beginner’s Guide to JSON](https://www.toolisco.com/guide?slug=beginners-guide-to-json): Understand JSON from the ground up: its data types, syntax rules, and the mistakes that cause parse errors.
- [What Is Base64 Encoding?](https://www.toolisco.com/guide?slug=what-is-base64-encoding): Why Base64 exists, how it turns binary into text, and when inlining data with it helps or hurts.
- [Understanding Canonical URLs](https://www.toolisco.com/guide?slug=understanding-canonical-urls): What canonical URLs are, why duplicate content is a problem, and how to point search engines at the right page.
- [How Robots.txt Works](https://www.toolisco.com/guide?slug=how-robots-txt-works): How the robots.txt file guides crawlers, what it can and cannot do, and the errors that block a whole site.
- [A Complete Guide to Schema Markup](https://www.toolisco.com/guide?slug=complete-guide-to-schema-markup): What structured data is, how JSON-LD works, and how to describe your pages so machines understand them.
- [Beginner’s Guide to QR Codes](https://www.toolisco.com/guide?slug=beginners-guide-to-qr-codes): How QR codes store data, what the patterns mean, and how to make codes that scan reliably.
- [Password Security Best Practices](https://www.toolisco.com/guide?slug=password-security-best-practices): What genuinely makes a password strong, why length beats complexity, and how to manage passwords sensibly.
- [Image Optimization for Websites](https://www.toolisco.com/guide?slug=image-optimization-for-websites): A workflow for fast-loading images: right size, right format, right compression, and modern delivery.
- [Beginner’s Guide to HTTP Headers](https://www.toolisco.com/guide?slug=beginners-guide-to-http-headers): What HTTP headers are, the ones worth knowing, and how they shape caching, security, and content type.

### Glossary terms

- [JSON](https://www.toolisco.com/glossary?term=json): A lightweight, text-based format for structured data.
- [XML](https://www.toolisco.com/glossary?term=xml): A tag-based markup language for structured documents and data.
- [YAML](https://www.toolisco.com/glossary?term=yaml): A human-friendly format often used for configuration.
- [Base64](https://www.toolisco.com/glossary?term=base64): A way to represent binary data as plain text.
- [API](https://www.toolisco.com/glossary?term=api): A defined way for programs to talk to each other.
- [QR Code](https://www.toolisco.com/glossary?term=qr-code): A square barcode that stores data in two dimensions.
- [Canonical URL](https://www.toolisco.com/glossary?term=canonical-url): The preferred address for a page that exists at several URLs.
- [Sitemap](https://www.toolisco.com/glossary?term=sitemap): A file listing a site’s URLs to help crawlers find them.
- [Robots.txt](https://www.toolisco.com/glossary?term=robots-txt): A file that tells crawlers which paths they may request.
- [Hreflang](https://www.toolisco.com/glossary?term=hreflang): Markup that links language or region versions of a page.
- [Open Graph](https://www.toolisco.com/glossary?term=open-graph): Meta tags that control how a link looks when shared.
- [SHA-256](https://www.toolisco.com/glossary?term=sha256): A cryptographic hash that produces a 256-bit fingerprint.
- [UUID](https://www.toolisco.com/glossary?term=uuid): A 128-bit identifier that is unique without a central authority.
- [JWT](https://www.toolisco.com/glossary?term=jwt): A signed, self-contained token carrying claims.
- [MIME Type](https://www.toolisco.com/glossary?term=mime-type): A label that tells software what kind of file something is.

## Company

- [About](https://www.toolisco.com/about): What the project builds and why privacy is the default.
- [Contact](https://www.toolisco.com/contact): How to reach the team with feedback and requests.

## Legal

- [Privacy Policy](https://www.toolisco.com/legal/privacy): What is and isn't collected; file contents never leave the browser.
- [Terms of Use](https://www.toolisco.com/legal/terms): Terms governing use of the service.
- [Disclaimer](https://www.toolisco.com/legal/disclaimer): Disclaimers about tools and content.
- [Cookie Policy](https://www.toolisco.com/legal/cookies): Use of cookies and browser storage.
- [Accessibility](https://www.toolisco.com/legal/accessibility): Accessibility commitment and WCAG reference.
- [Editorial Policy](https://www.toolisco.com/legal/editorial): How content is researched, written, and reviewed.
- [DMCA & Copyright](https://www.toolisco.com/legal/dmca): Copyright notice and takedown process.