Developer Tools
Format, validate, encode, and debug code and data without leaving your browser.
These utilities cover the small jobs that interrupt development: formatting a response from an API, testing a regex against sample input, converting between encodings, generating unique IDs, and inspecting tokens. Because processing happens in your browser, code snippets and payloads are not sent to a server.
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JSON Formatter
Clean, indent, and validate JSON for quick reviews and debugging.
Regex Tester
Test patterns against sample data with live match highlighting.
Base64 Encoder
Encode strings and files to Base64 without leaving your browser.
URL Encoder
Encode and decode URLs and query parameters safely.
Hash Generator
Generate, verify, and compare MD5, SHA-1, and SHA-256 digests.
UUID Maker
Generate v4 UUIDs and other identifier formats instantly.
JWT Inspector
Decode JWTs locally, inspect claims, and flag expirations.
HTML Minifier
Minify HTML before shipping to production.
CSS Minifier
Minify, format, validate, and inspect CSS in one place.
Slug Generator
Build cleaner URLs with bulk mode and redirect export.
Number Converter
Convert decimal, binary, hex, and octal values instantly.
XML Validator
Validate XML syntax and show parsing errors clearly.
XML Beautifier
Format messy XML into readable indentation.
Crontab Guru
Explain common cron expressions in plain English.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back.
Markdown Previewer
Preview Markdown documents without installing anything.