214 tools · Open source · Runs 100% in your browser

Browser-based tools that respect your privacy

Every tool runs locally in your browser. Your data never leaves your device.

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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.

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JSON Formatter

Format and prettify JSON with proper indentation. Paste JSON or import a file; preview, copy, and download.

QR Code Generator

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.

UUID v4 Generator

Generate a random RFC 4122/RFC 9562 UUID v4 locally in your browser.

Base64 Encoder and Decoder

Encode plain text to Base64 and decode Base64 back to Unicode text directly in your browser.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports auto-detection of seconds, milliseconds, and nanoseconds.

Random Password Generator

Generate passwords, passphrases, grouped codes, and PINs in your browser.