Bytelify
Small utilities that run entirely in your browser. No signup required.
Credit Card Number Generator
Generate valid-format test credit card numbers for QA and development. Runs entirely in your browser, nothing is sent anywhere.
Credit Card Validator
Check whether a card number passes the Luhn checksum and see which network it belongs to, instantly as you type.
MongoDB ObjectId ↔ Timestamp Converter
Convert between a MongoDB ObjectId and its embedded creation timestamp, both directions, live as you type.
Text Repeater
Repeat any text a set number of times, with an optional separator, instantly as you type.