Free Online Developer & Generator Tools

Free Online Tools Suite

A curated collection of free developer and testing tools. No signup required — just open and use.

Generate test data for development and QA

Generate valid credit card numbers for testing and development purposes.

Look up bank identification numbers to verify card details and issuer info.

Generate valid IMEI numbers for mobile device testing and QA.

Generate and validate IBAN numbers for banking and payment testing.

Generate random MAC addresses for network testing and configuration.

Generate UUIDs v1, v4, v5 and more for databases and APIs.

Passwords, hashing, and encryption utilities

Generate strong, secure random passwords with customizable options.

Generate MD5, SHA-1, SHA-256 and other cryptographic hashes online.

Convert and transform data formats

Encode and decode Base64 strings instantly in your browser.

Convert hexadecimal strings to ASCII text and vice versa.

Essential tools for everyday development

Format, validate, and minify JSON data with syntax highlighting.

Generate placeholder text for design mockups and prototypes.