🛠️ Developer Tools

Free Online Developer Tools

Quick, free tools built for developers. No login required.

B64
Base64 Encoder & Decoder
Encode and decode Base64 strings and files online. Supports text, URLs and binary data.
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JSON Formatter & Validator
Format, validate and minify JSON online. Paste messy JSON and get it beautifully indented instantly.
JWT
JWT Decoder
Decode and inspect JSON Web Tokens instantly. See header, payload and signature without a secret key.
60
Minutes to Hours Converter
Convert minutes to hours: decimal, HH:MM, seconds, and payroll-rounded (nearest quarter-hour). Bidirectional. Bulk mode for timesheets.
Az
Random Letter Generator
Generate random letters A–Z with full control: bulk output up to 500, vowels/consonants filter, no-duplicates mode, frequency weighting, and one-click copy for code and games.
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Regex Tester — JavaScript & Python
Test regular expressions online with real-time match highlighting. Supports JavaScript and Python regex syntax.
SQL
SQL Formatter & Beautifier
Format and beautify SQL queries online. Supports SELECT, INSERT, UPDATE, DELETE and complex JOINs.
⏱
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds and multiple timezones.
TZ
Timezone Converter
Convert between IST, EST, PST, CST, UTC, GMT, JST and 8 more timezones. DST-aware with shareable links and meeting overlap grid.
XML
XML Formatter & Validator
Format, validate and minify XML online. Paste messy XML and get it properly indented and validated instantly.