As developers, we work with JSON, JavaScript, and data formats daily. But most online tools require signups, upload your data to servers, or are filled with ads.
That's why I built XYUtil - a collection of 90+ free developer tools that run 100% in your browser. No data leaves your device.
Here are my top 10 picks for JSON and code formatting:
1. JSON Formatter 📝
The Swiss Army knife for JSON:
- Format: Beautify minified JSON
- Compress: Minify for production
- Validate: Catch syntax errors instantly
👉 https://www.xyutil.com/xjson/
2. JSON Escape/Unescape 🔗
Working with JSON strings in JavaScript? This handles:
- Quote escaping (
\"vs") - Special characters (
\n,\t, etc.) - Reverse escaping for display
👉 https://www.xyutil.com/json-escape/
3. JSON Diff 🔄
Debugging API responses? Compare two JSON files:
- Visual difference highlighting
- Nested structure comparison
- Track added/removed/changed properties
👉 https://www.xyutil.com/json-diff/
4. XML/JSON Converter 🔄
Legacy systems meet modern APIs:
- Bidirectional conversion
- Preserves data structure
- Handles arrays and nested objects
👉 https://www.xyutil.com/xml-json/
5. CSV/JSON Converter 📊
Data pipeline essential:
- CSV → JSON for APIs
- JSON → CSV for Excel
- Auto-detects headers
👉 https://www.xyutil.com/csv-json/
6. JWT Decoder 🔑
Debugging authentication?
- Decode tokens instantly
- View header & payload
- No server calls (completely safe!)
👉 https://www.xyutil.com/jwt-decoder/
7. JavaScript Formatter ⚡
Got minified or obfuscated JS?
- Beautify with one click
- Fix broken indentation
- Make code readable again
👉 https://www.xyutil.com/jsformat/
8. JavaScript Minifier ⚡
Production-ready code:
- Remove whitespace & comments
- Reduce file size by 60%+
- Faster page loads
👉 https://www.xyutil.com/js-minify/
9. HTML/XML Formatter 📄
Clean markup matters:
- Beautify messy HTML/XML
- Compress for deployment
- Validate structure
👉 https://www.xyutil.com/htmlformat/
10. SQL Formatter 🗃️
Readable queries = fewer bugs:
- Format nested queries
- Align columns & clauses
- Support multiple SQL dialects
👉 https://www.xyutil.com/sql-format/
Why Client-Side Matters
All these tools run entirely in your browser:
✅ Privacy: Your code/data never leaves your device
✅ Speed: No server roundtrip = instant results
✅ Offline: Works after first load
✅ Free: No signup, no premium tier
Explore More
XYUtil has 90+ tools including:
- Base64 encode/decode
- QR code generator
- Image converters
- Color tools
- Regex tester
- And much more...
What's your most-used developer tool? Drop a comment! 👇
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