PureKit
Your data never leaves your device

Free Browser-Based Developer Tools

Privacy-first tools that run entirely in your browser. No uploads, no tracking, no signup required.

Formatters

JSON Formatter & Validator
Format, validate, and minify JSON data instantly in your browser.

Encoders & Decoders

Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
URL Encode / Decode
Encode or decode URL components instantly in your browser.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) instantly in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.

Generators

UUID Generator
Generate random UUIDs (v4) instantly in your browser.
QR Code Generator
Generate QR codes for URLs, text, or any data instantly in your browser.

Converters

Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly.
Color Converter
Convert colors between HEX, RGB, HSL, and other formats instantly.

Text Tools

Diff Checker
Compare two texts and highlight the differences line by line.
Markdown Preview
Write Markdown and preview the rendered HTML output in real-time.

Data Tools

CSV Data Cleaner
Parse, clean, and transform CSV data with deduplication and filtering.

Image Tools

Image Format Converter
Convert images between PNG, JPEG, and WebP formats in your browser.
Image Compressor
Compress images to reduce file size while maintaining visual quality.