Toolbox
Complete common development and productivity tasks in your browser.
Chinese Converter Tool
Online Simplified and Traditional Chinese converter tool with real-time conversion.
JSON Validator Tool
Online JSON validator and formatter with error reporting and minification.
MD5 Calculator Tool
Online MD5 calculator showing 32-char lowercase/uppercase digests with easy copy.
Base64 Encode/Decode Tool
Online Base64 encode/decode tool for UTF-8 text with easy copy.
Random Password Generator
Generate secure random passwords with custom length and character sets, easy to copy.
Favicon Generator
Upload an image to generate a multi-size favicon.ico for your site.
Timestamp Converter
Convert timestamps to readable time and back, with seconds/milliseconds and timezone switching.
Unit Converter
Convert length, mass, and temperature units with a pure frontend form.
Barcode / QR Generator & Decoder
Pure frontend: generate PNGs and decode images via BarcodeDetector (QR / Code128).
Cron Visualizer
Pure frontend 5-field cron visualizer showing upcoming run times.
PDF Splitter
Split a PDF into multiple files by page breaks, entirely in your browser.
PDF Booklet Maker
Impose a PDF into a printable booklet, entirely in your browser.
Metronome
Online metronome with tempo (BPM), time signature and subdivision control, tap-tempo support for music practice and rhythm training.