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Dev Tools

16 Free Developer Tools

Format JSON, encode Base64, generate hashes, test regex, decode JWTs and convert data formats — all instantly in your browser.

free tools — no signup, no tracking
🔗
Redirect Checker
Trace 301/302/307 redirect chains and find the final URL
📝
JSON Formatter
Format, validate and minify JSON instantly
💻
Base64 Encoder
Encode and decode Base64 strings
🔑
Hash Generator
Generate MD5, SHA-256, SHA-512 hashes
🔍
Diff Checker
Compare two texts and highlight differences
⚙️
Regex Tester
Test regular expressions with live matching
🔑
JWT Decoder
Decode and inspect JSON Web Tokens
🔤
URL Encoder
Encode and decode URLs and query strings
🔢
Base Converter
Convert between binary, hex, octal and decimal
📊
CSV to JSON
Convert CSV spreadsheet data to JSON format
📊
JSON to CSV
Convert JSON arrays to CSV spreadsheet format
💬
Markdown to HTML
Live Markdown preview and HTML converter
⚙️
Text to Binary
Convert text to binary, hex, octal or decimal
🖼️
Image to Base64
Encode images as Base64 Data URI strings
📄
XML Formatter
Format, validate, minify and convert XML to JSON
⏱
Timestamp Converter
Convert Unix timestamps to dates and vice versa

About These Free Developer Tools

All 16 tools run entirely in your browser, nothing you paste, upload, or type is sent to our servers or logged anywhere. This means faster processing with no network round-trip, and complete privacy for sensitive data like JWTs, API keys, or internal JSON payloads.

Key tools: JSON Formatter validates and pretty-prints JSON with error highlighting, and JWT Decoder inspects any JSON Web Token's header, payload, and signature without needing to trust a third-party service with your token.

Related: JSON Formatter: How to Read, Format and Fix JSON Errors

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Frequently Asked Questions

What developer tools are available?
Free dev tools include JSON formatter, regex tester, JWT decoder, Base64 encoder, hash generator, diff checker, XML formatter, URL encoder, markdown to HTML and more.
Are these developer tools free to use?
Yes, all 16 developer tools are completely free. No account, no signup, no rate limits. Use them directly in your browser.
Can I use these tools offline?
The tools run in your browser and require an internet connection. Bookmark the tools page for quick access during development.
Is my data safe when using these tools?
Yes. Every tool on this page processes data entirely in your browser using JavaScript, nothing you paste or upload is sent to our servers or logged anywhere. This is true for JSON, Base64, hashes, JWTs, and all other tools listed here.
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