Free Developer Tools Online

Developer tools at multiutility.online give programmers quick access to utilities they reach for dozens of times per day: JSON formatting, Base64 encoding, UUID generation, regex testing, timestamp conversion, and CSS minification. Each tool produces clean output you can copy directly into your editor, terminal, or API client.

Most tools process data in your browser, which means API keys, config snippets, and test payloads stay on your machine. No account required, no rate limits, no IDE plugin to install.

Data Formatting & Validation

• JSON Formatter — Prettify, minify, and validate JSON
• YAML to JSON — Convert YAML configs to JSON
• JSON to YAML — Convert JSON to YAML format
• JSON to CSV — Export JSON arrays to CSV
• CSV to JSON — Parse CSV into JSON objects
• SQL Formatter — Format SQL queries for readability
• XML Beautifier — Format and indent XML documents
• HTML Beautifier — Clean up HTML markup

Encoding, Hashing & Security

• Base64 Encode/Decode — Convert text to and from Base64
• URL Encode/Decode — Encode URI components safely
• Hash Generator — MD5, SHA-256, and other hashes
• HTML Encode/Decode — Escape HTML entities
• Hex Encode/Decode — Convert text to hexadecimal
• JWT Decoder — Inspect JSON Web Token payloads
• Password Strength Checker — Evaluate password security

Generators & Testing

• UUID Generator — Create random UUID v4 identifiers
• Bulk UUID Generator — Generate multiple UUIDs at once
• Regex Tester — Test regular expressions live
• Timestamp Converter — Unix time ↔ human dates
• Number Base Converter — Binary, octal, decimal, hex
• CSS Minifier — Compress CSS for production
• JS Minifier — Minify JavaScript code
• Cron Generator — Build cron schedule expressions
• Fake Data Generator — Sample JSON test data