Lab
Tools.
Fast and lightweight daily utilities. Running 100% client-side in your browser with zero server uploads.
QR Code Generator & Reader (with Pix)
Generate QR codes for links, Pix BR Code or Wi-Fi and decode images directly.
Image Compressor & Converter
Convert between PNG, JPEG and WebP and compress without sending files to any server.
Merge & Split PDF
Merge multiple PDF files into one or extract specific page ranges safely.
JSON Formatter & Validator
Format, minify and detect syntax errors in JSON payloads in real-time.
Text & Code Diff Checker
Compare two versions of text or code and visualize additions and removals.
CPF / CNPJ Validator & Generator
Validate Brazilian CPF and CNPJ documents or generate valid test numbers.
Password, UUID & Hash Generator
Cryptographically secure passwords, UUIDs v4 and SHA-256 hashes generated client-side.
Compound Interest Calculator
Simulate wealth accumulation with monthly contributions and compound interest.
Real-time Regex Tester
Test JavaScript regular expressions and inspect matches in real time.