Developer Tools
JSON, Base64, UUID, hashing, URL encoding and regular expressions.
Small utilities that save developers time. Format and validate JSON, encode and decode Base64, generate UUIDs, compute hashes, URL-encode strings, and test regular expressions with a live matcher.
All tools
JSON Formatter
Format, minify and validate JSON with one click.
Base64 Encoder
Encode any text, including Unicode, to Base64.
Base64 Decoder
Decode Base64 strings back to readable text.
URL Encoder
Encode text for safe use inside URLs and query strings.
URL Decoder
Decode percent-encoded URLs back to readable text.
Hash Generator
Generate MD5, SHA-1 and SHA-256 hashes of any text.
Regex Tester
Test regular expressions against text with live matches.
7 tools · updated continuously
How these tools work
Small utilities that save developers time. Format and validate JSON, encode and decode Base64, generate UUIDs, compute hashes, URL-encode strings, and test regular expressions with a live matcher. Every tool in this category publishes its formula, worked example and assumptions so you can verify the result yourself.
Frequently asked questions
Does Base64 encoding run in my browser?
Yes. Every developer tool runs entirely client-side. Your strings, JSON and data never leave your device.
Which hash algorithms are supported?
Hashing uses the Web Crypto API with SHA-1, SHA-256 and SHA-512, depending on the tool, and the digest is shown as a lowercase hex string.
Is the JSON formatter safe for large files?
The formatter handles typical API responses comfortably. For very large documents, consider running it in a terminal instead of a browser tab.