Category
Free Online Developer Tools
JSON, Base64, URL encoding, UUID and regex utilities.
SPONSORED
Auto Ads managed by Google AdSense
Developer Tools Popular
JSON Formatter
Format, prettify, and validate JSON with syntax highlighting.
Open tool
Developer Tools
JSON Validator
Validate JSON syntax and quickly locate errors.
Open tool
Developer Tools Popular
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
Open tool
Developer Tools
URL Encoder / Decoder
Percent-encode or decode URLs and query string parameters.
Open tool
Developer Tools Popular
UUID Generator
Generate cryptographically strong UUID v4 identifiers in bulk.
Open tool
Developer Tools
Regex Tester
Test JavaScript regular expressions with live match highlighting.
Open tool
About our developer tools
JSON, Base64, URL encoding, UUID and regex utilities. Every tool listed here runs entirely in your browser and requires no signup - just open the tool you need and get your result instantly.