Developer Tools
14 free online developer tools including JSON Formatter & Validator, JSON to XML Converter, XML to JSON Converter, HTML Formatter, HTML Minifier, and more. Browser-based, no signup, worldwide.
JSON Formatter & Validator
Format, validate, minify JSON with syntax highlighting and error detection....
Open tool ->JSON to XML Converter
Convert JSON data to well-formed XML with attribute support....
Open tool ->XML to JSON Converter
Convert XML documents to clean JSON objects with type detection....
Open tool ->HTML Formatter
Beautify HTML code with proper indentation and line breaks....
Open tool ->HTML Minifier
Compress HTML by removing whitespace and comments for production....
Open tool ->CSS Minifier
Minify CSS by stripping whitespace, comments, and redundant code....
Open tool ->JavaScript Minifier
Compress JavaScript by removing whitespace and comments....
Open tool ->Code Beautifier
Format and beautify messy code with customizable indentation....
Open tool ->Regex Tester
Test regular expressions with live match highlighting and flag toggles....
Open tool ->SQL Formatter
Format SQL queries with proper indentation, keyword capitalization....
Open tool ->JWT Debugger
Decode JWT tokens to inspect header, payload, and signature....
Open tool ->UUID Generator
Generate cryptographically secure UUIDs (v4) in bulk with copy support....
Open tool ->Hash Generator (MD5/SHA)
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text input....
Open tool ->Barcode Generator
Generate Code 128, EAN-13, Code 39 barcodes with customization....
Open tool ->Why use these Developer Tools?
These developer tools are built for quick formatting, encoding, testing, and debugging tasks that usually slow down everyday frontend and backend work.
Popular use cases
- Formatting JSON, HTML, SQL, and code snippets
- Testing regex, JWTs, hashes, and encoded strings
- Cleaning payloads before pasting them into apps or APIs
Best tools to start with
Start with the tools above if you want quick wins in this category, then explore the full list for more specific workflows.
Quick questions about Developer Tools
Are developer tools private?
For most tools, yes. Formatting and validation usually happen in the browser.
Which tools are best for API work?
JSON Formatter, JWT Debugger, Base64 tools, and Regex Tester are strong starting points.
Can I use them on mobile?
Yes, although larger formatting tasks are usually easier on desktop.