The website OneConvert is a versatile online platform designed primarily for various types of conversions, including files and units of measurement, catering especially to professionals in engineering, finance, and science. It offers a broad array of tools, allowing users to convert, edit, protect, merge, and compress PDF files, among other functionalities. The site supports conversion between many different document formats like Word, Excel, and PowerPoint to PDF and vice versa. Additionally, it provides over 50,000 tools for converting units across numerous categories such as length, temperature, volume, and more.