Developer Tools
Everyday utilities for working with code and data: formatters, encoders, and generators that run entirely client-side.
JSON Formatter
Format, validate, and beautify JSON with proper indentation.
Base64 Encoder / Decoder
Encode text to Base64, or decode Base64 back to plain text.
URL Encoder / Decoder
Encode text for safe use in a URL, or decode a URL-encoded string.
UUID Generator
Generate random, version-4 UUIDs for use in code or databases.
Hash Generator
Generate a SHA-1, SHA-256, or SHA-512 hash of any text.
HTML Encoder / Decoder
Encode text to HTML entities, or decode HTML entities back to plain text.
Color Converter
Convert between HEX and RGB color formats.
Regex Tester
Test a regular expression against sample text and see all matches.
Related Guides
Frequently Asked Questions
- Are the tools in Developer Tools free to use?
- Yes — every tool is free, with no sign-up and no usage limits.
- Does my data leave my browser?
- No — every tool in Developer Tools processes your input entirely on your device. Nothing is uploaded to a server.
- How do I find a specific tool?
- Use the search bar in the header, or browse the full list below — each tool links to a page with an explanation and a worked example.