Developer Tools
The developer tools bring together the small, frequent jobs that fill a working day: formatting and validating JSON, HTML, and CSS; encoding and escaping text; generating code snippets and data URIs; and inspecting tokens and timestamps. They are built for quick, private, in-browser use, so you can paste, transform, and copy without a round trip to a server.
What this category covers
This category spans formatters and validators, encoders and escaping utilities, code and data-URI generators, and a range of developer conveniences. Anything that takes text or a file and returns clean, copy-ready output for your codebase lives here.
Common use cases
- Formatting a minified JSON payload to read it during debugging
- Percent-encoding a value before putting it in a URL
- Generating a framework component with an image inlined
- Validating that a Base64 string is well-formed before shipping it
- Escaping text so code displays as text in HTML
Best practices
- Validate JSON before you rely on it; a single missing comma is the usual culprit behind a parse error.
- Keep a formatted copy for editing and a minified copy for production rather than shipping the pretty version.
- Inline only small images as data URIs; link larger assets so they can be cached.
- Use URL-safe encoding when a value travels in a URL, and standard encoding elsewhere.
Tools in this category
JSON Formatter
Beautify and validate JSON with indentation, error detection, and a collapsible tree view.
Launch toolData URI Generator
Turn an image into a ready-to-paste data: URI for HTML or CSS.
Launch toolURL Encoder
Percent-encode text for safe use in URLs and query strings, in real time.
Launch toolHTML Formatter
Beautify HTML with clean indentation, plus a live preview of the markup.
Launch toolBase64 Validator
Check characters, padding, length, and data URI format with clear results.
Launch toolReact JSX Generator
Generate a production-ready React function component with props, lazy loading, and accessibility.
Launch toolGo deeper
Beginner’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 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 read