12 tools
Developer Tools
The 12 utilities I built because I stopped trusting twelve other sites.
Base64 and URL encoders, a JSON formatter and validator, a live regex tester, a JWT decoder, a UUID v4 generator, a multi-algorithm hash generator, a SQL beautifier, a visual cron builder, a CSV↔JSON converter, a Unix timestamp converter, and a color converter with picker.
Everything runs in your browser. JWTs you paste in, regex patterns you test, JSON you format — none of it leaves your tab. Open the Network panel and confirm it yourself.
Showing 12 of 12
Developer Tools list
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Base64 Encode & Decode Online Free
Encode or decode Base64 strings instantly. Browser-only.
In your browser -
URL Encode & Decode Online Free
Encode or decode URL components. Browser-only.
In your browser -
JSON Formatter & Validator Online
Pretty-print, validate, or minify JSON. Errors highlighted.
In your browser -
Regex Tester & Debugger Online Free
Test regex patterns with live highlighting. JavaScript engine.
In your browser -
JWT Decoder Online Free
Decode JSON Web Tokens. Header, payload, signature.
In your browser -
UUID Generator Online Free
UUIDv4 generator. Cryptographically random, RFC 4122 compliant.
In your browser -
Hash Generator, SHA-256 SHA-512
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes in your browser.
In your browser -
SQL Formatter & Beautifier
Format SQL queries. Supports MySQL, PostgreSQL, T-SQL, PL/SQL.
In your browser -
Cron Expression Builder
Build cron expressions visually. Plain-English description + next 5 run times shown.
In your browser -
CSV to JSON Converter
Convert CSV to JSON or JSON to CSV. Custom delimiters supported.
In your browser -
Unix Timestamp Converter
Unix timestamps to dates and back. Live current timestamp display.
In your browser -
Color Converter, HEX RGB HSL
Convert between HEX, RGB, and HSL with a visual picker.
In your browser