214 tools · Open source · Runs 100% in your browser
Every tool runs locally in your browser. Your data never leaves your device.
Popular: JSON Formatter UUID v4 Generator Base64 Encoder and Decoder Unix Timestamp Converter
No uploads
Files are processed on your device and never sent anywhere.
No servers
Everything computes locally — open source and auditable.
Works offline
Installable as a PWA — tools keep working without a network.
Format and prettify JSON with proper indentation. Paste JSON or import a file; preview, copy, and download.
Generate QR codes for text, links, Wi-Fi credentials, contacts, phone actions, locations, and calendar events. Download the result as PNG, JPG, WebP, or SVG.
Generate a random RFC 4122/RFC 9562 UUID v4 locally in your browser.
Encode plain text to Base64 and decode Base64 back to Unicode text directly in your browser.
Convert Unix timestamps to human-readable dates and vice versa. Supports auto-detection of seconds, milliseconds, and nanoseconds.
Generate passwords, passphrases, grouped codes, and PINs in your browser.