All tools

Focused utilities for everyday technical work.

Seven clear, account-free tools for security, networking, documents, hashing, and Unix timestamps.

Password Generator

Create strong, unique passwords using the cryptographic random generator built into your browser.

Generate RFC 6238 time-based codes locally from a Base32 secret.

Check the public address and request metadata visible to the application server.

Write Markdown, preview it safely, download the source, or create a polished A4 PDF.

Calculate a normalized IPv4 network, masks, address range, broadcast address, and usable hosts.

Calculate lowercase hexadecimal hashes for text or a local file using Web Crypto.

Convert Unix seconds or milliseconds into ISO 8601, UTC, local time, and a relative description.

Browser-only tools keep their calculation inputs on your device. Server-assisted tools identify exactly what is transmitted and why.