Open multiple URLs at once.

Free online HTML editor with real-time preview. Write HTML, CSS, and JavaScript and see the results instantly in a live iframe.

Convert numbers between binary, decimal, hexadecimal, and octal. See all bases simultaneously. Supports large numbers. Free online number base converter.

Test your network connection speed.

Find out your public IP address and device information.

Calculate Mean Time Between Failures (MTBF), Mean Time to Repair (MTTR), Mean Time to Detect (MTTD), failure rate lambda, and operational system availability.

Calculate nanoscale MOSFET subthreshold swing (SS), Drain-Induced Barrier Lowering (DIBL), OFF-state leakage current (Ioff), and transfer characteristics.

Searchable database of common file extensions and their corresponding MIME types.

Generate MD5 hash from any string online. Fast, secure, and private hashing in your browser.

Convert Markdown to PDF online. Parse markdown text and export to a downloadable PDF file.