Understand the tools, not just use them
A growing library of category overviews, plain-English guides, and a glossary — so you know what a format, tag, or token actually does before you reach for a tool.
Explore a topic
Each category page explains what the topic is, when to use it, which tools help, and the guides that go deeper.
Image Tools
Convert, compress, resize, and inspect images without uploading them.
43 tools · read overviewPDF Tools
Merge, split, rotate, and build PDFs entirely in the browser.
10 tools · read overviewDeveloper Tools
Encode, format, generate, and inspect — copy-ready output for your stack.
59 tools · read overviewText Tools
Transform, count, encode, and clean up text in one place.
22 tools · read overviewSEO Tools
Generate the tags and markup that help pages present well.
11 tools · read overviewSecurity Tools
Generate passwords and tokens, hash data, and inspect credentials.
23 tools · read overviewSocial Media Tools
Resize and prepare images for every platform and placement.
12 tools · read overviewGovernment Photo Tools
Prepare passport, visa, and ID photos to common specifications.
8 tools · read overviewLearn the fundamentals
Practical, non-promotional explainers written to teach a concept clearly.
How to Compress Images Without Losing Quality
A practical look at where image file size comes from and how to cut it while keeping pictures sharp.
7 min readJPG vs PNG vs WebP vs AVIF
How the four common web image formats differ, and how to choose the right one for each job.
8 min readHow PDF Compression Works
What actually happens inside a PDF when you compress it, and why images are usually the deciding factor.
6 min readBeginner’s Guide to JSON
Understand JSON from the ground up: its data types, syntax rules, and the mistakes that cause parse errors.
7 min readWhat Is Base64 Encoding?
Why Base64 exists, how it turns binary into text, and when inlining data with it helps or hurts.
7 min readUnderstanding Canonical URLs
What canonical URLs are, why duplicate content is a problem, and how to point search engines at the right page.
6 min readHow Robots.txt Works
How the robots.txt file guides crawlers, what it can and cannot do, and the errors that block a whole site.
6 min readA Complete Guide to Schema Markup
What structured data is, how JSON-LD works, and how to describe your pages so machines understand them.
9 min readBeginner’s Guide to QR Codes
How QR codes store data, what the patterns mean, and how to make codes that scan reliably.
6 min readPassword Security Best Practices
What genuinely makes a password strong, why length beats complexity, and how to manage passwords sensibly.
7 min readImage Optimization for Websites
A workflow for fast-loading images: right size, right format, right compression, and modern delivery.
8 min readBeginner’s Guide to HTTP Headers
What HTTP headers are, the ones worth knowing, and how they shape caching, security, and content type.
8 min readLook up a concept
Short, beginner-friendly definitions of the formats, tags, and terms these tools work with — from JSON and Base64 to hreflang, JWT, and MIME types.