valsec.pro

All tools

Fast, private utilities that run entirely in your browser.

Security & Privacy

Passwords, hashes and what your browser leaks

Password Generator with Breach Check Generate strong, random passwords and instantly check if they’ve appeared in a data breach — privately, in your browser. Password Strength Checker See how strong your password really is and how long it would take to crack — nothing leaves your device. Hash Generator (MD5, SHA-1, SHA-256, SHA-512) Generate cryptographic hashes of any text with the Web Crypto API, entirely client-side. WebRTC Leak Test Check whether WebRTC exposes your local or public IP address behind a VPN.

Encoders & Formatters

Encode, decode and prettify data

JSON Formatter & Validator Beautify, minify and validate JSON with clear error messages — fast and private. Base64 Encode / Decode Convert text to and from Base64, with full Unicode support. JWT Decoder Decode and inspect JSON Web Tokens — header, payload and expiry — without sending them anywhere. URL Encode / Decode Percent-encode or decode URLs and query components correctly.

Generators

IDs, QR codes and more

UUID & ULID Generator Generate v4 UUIDs and ULIDs in bulk, using a cryptographically secure random source. QR Code Generator Create high-resolution QR codes for links, text or Wi-Fi and download them as PNG or SVG.

Developer Utilities

Everyday tools for building software

Regex Tester Test regular expressions live with match highlighting, groups and flags. Cron Expression Parser Translate a cron expression into plain English and preview the next run times. Unix Timestamp Converter Convert between Unix timestamps and human-readable dates in any time zone.