Free developer tools, open source and coding tips
Small, well-tested tools you can use in the browser or drop into your code, from Sylvester Das and the team behind MiniFyn.
Open-source projects
MIT-licensed, zero-dependency and free forever.
Caesar Cipher Decoder & Encoder
Encrypt, decrypt, ROT13 and brute-force all 25 shifts in your browser, or use the Node.js package with Strings, Buffers, Streams and TypeScript types.
Vigenère Cipher Decoder & Encoder
Encrypt and decrypt with a keyword, or paste a secret message and crack the unknown key live with frequency analysis. Also a zero-dependency Node.js package.
Random Cat Facts
A random cat fact, the fact of the day, or search 108 curated facts in your browser. Also an offline, zero-dependency Node.js package and CLI.
Free privacy & sharing tools from MiniFyn
The simplest way to shorten, share, and track your links, plus privacy-first apps that run on your device.
MiniFyn: URL Shortener & Hub
Lightning-fast edge link shortening, custom bio-links, QR code generator and link analytics with built-in threat protection.
ScamGuard: Link Checker
Inspect suspicious links, QR codes and redirect chains before opening them to stay safe from phishing.
CensorFyn: Offline Media Redact
Auto-detect and irreversibly redact faces, passports, credit cards, PII text and QR codes, 100% offline.
ClipFyn: Video Preparation
Inspect, crop, fit and prepare videos on-device for compatible sharing, with no quality loss or server uploads.