Developer Tools - Free Online Utilities
Fast utilities for frontend and backend workflows. Format JSON, encode Base64, generate UUIDs, and debug data instantly — all in your browser.
All Developer Tools
17 tools liveJSON Formatter
Beautify, validate, and minify JSON payloads instantly.
Open Tool →JSON Validator
Check JSON syntax and format it for readability.
Open Tool →JSON Minifier
Compress JSON by removing whitespace.
Open Tool →JSON to CSV
Convert JSON data into CSV rows quickly.
Open Tool →CSV to JSON
Turn CSV rows into a JSON array instantly.
Open Tool →Base64 Encode
Encode UTF-8 text to Base64 for secure transport.
Open Tool →Base64 Decode
Decode Base64 strings to readable text with validation.
Open Tool →Text to Base64
Quick one-step conversion from text into Base64 output.
Open Tool →URL Encoder
Encode text for safe use in URLs and query strings.
Open Tool →URL Decoder
Decode percent-encoded URLs back to text.
Open Tool →HTML Encoder
Encode HTML entities to display markup safely.
Open Tool →HTML Decoder
Decode HTML entities into readable text.
Open Tool →XML Formatter
Format XML with clean indentation.
Open Tool →XML to JSON
Convert XML into JSON output.
Open Tool →UUID Generator
Generate UUID v4 identifiers in bulk.
Open Tool →Hash Generator
Create MD5 or SHA hashes from text.
Open Tool →Diff Checker
Compare two text blocks for line changes.
Open Tool →What You Can Do Here
Use these tools to format JSON payloads, encode and decode Base64 values, hash sensitive content, and quickly verify text transformations before using them in apps, scripts, or API requests.
Pick a tool above, paste your input, and get clean output instantly without setup.
Frequently Asked Questions
Is the JSON Formatter free to use?
Yes. The JSON Formatter and every developer tool here is 100% free with no signup.
How do I encode and decode Base64 online?
Open Base64 Encode or Base64 Decode, paste your input, then copy the result in one click.
Are these tools safe for sensitive data?
Tools run entirely in your browser, so input never leaves your device. Still, avoid pasting production secrets unless your team approves.
Can I generate UUIDs in bulk?
Yes — the UUID Generator supports bulk generation up to thousands of UUID v4 identifiers.