All Free Developer Tools
Explore 11 fast, reliable, and privacy-conscious web utilities engineered for everyday developer workflows. Everything runs directly in your browser.
JSON Formatter & Validator
Format, validate and inspect JSON with clear syntax errors.
Open toolText Diff Checker
Compare two text blocks and spot added or removed lines.
Open toolBase64 Encoder & Decoder
Encode or decode Base64 text with Unicode support.
Open toolURL Encoder & Decoder
Encode URL components and decode percent-encoded text.
Open toolRegex Tester
Test regular expressions, flags and matches against sample text.
Open toolUUID Generator
Generate random UUID v4 identifiers in bulk, instantly.
Open toolSHA Hash Generator
Create SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text.
Open toolJWT Decoder
Decode JSON Web Token headers and payloads and check expiry.
Open toolUnix Timestamp Converter
Convert Unix epoch time to readable dates and back.
Open toolPassword Generator
Generate strong random passwords with entropy estimates.
Open toolColor Converter
Convert HEX, RGB and HSL colors and check text contrast.
Open toolCategorized Hub
Tools Grouped by Domain
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Developer tools Utilities
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Learn the mechanics behind each tool
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