Developer tools
that stay in your browser
Format data, decode tokens, convert files, and explore package indexes—without uploading secrets to a server. Browse our live catalog or jump straight into the workflow you need.
Popular tools
High-traffic utilities developers open first—JSON, auth, encoding, and more.
JSON Formatter
Format, beautify, minify, and validate JSON logs in real-time with precise syntax line-number error highlighting.
JWT Decoder
Decode and inspect JSON Web Tokens locally. Extract header, payload, claims, and real-time expiration countdown.
Base64 Encoder / Decoder
Encode plain text or files to Base64 and decode Base64 strings back to text with full Unicode support.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files entirely in your browser.
YAML Formatter / Validator
Validate, format, and minifies YAML configurations with syntax highlighting.
Regex Tester
Build, test, and debug regular expressions with live match highlighting, capture groups, and flags selector.
UUID / GUID Generator
Generate cryptographically secure UUID v4 identifiers in bulk. Copy as array, newline, or comma-separated list.
Color Picker & Converter
Pick and convert colors between HEX, RGB, HSL, and HSV. Generate shades, tints, and complementary palettes.
Browse by Category
Select a developer utility category to view specialized tools.
JSON Tools
22 utilities
Format, validate, parse, and explore structured JSON layouts.
Formatters
15 utilities
Beautify SQL, HTML, CSS, and JavaScript code instantly.
Converters
18 utilities
Safely encode data, convert timestamps, and transform strings.
Encoding & Decoding
0 utilities
Base64, hex, HTML entities, Unicode, and binary-safe encoders—free and client-side.
Security & Auth
17 utilities
Decode tokens, generate hashes, and create secure passwords.
Text Utilities
45 utilities
Test regex, diff text, count words, and transform strings.
UI & Color
12 utilities
Pick colors, check contrast, convert units, and build gradients.
Dev Utilities
26 utilities
Generate UUIDs, QR codes, cron expressions, and .gitignore files.
Network Tools
9 utilities
DNS lookup, IP info, SSL checker, and MX record tools.
AI-Powered Tools
4 utilities
AI prompt engineering, semantic commit logs, and regex patterns generated client-side.
Built for real developer workflows
One place for everyday utilities, package research, and client-side processing.
Private by default
Sensitive payloads stay on your device. No account required to format JSON or decode a JWT.
Instant feedback
Tools run in the browser with Web Workers and WASM where it matters—no round trip to our servers.
Growing catalog
Live tools ship continuously; the full catalog tracks what is active today and what is coming next.