HTM Converter
Convert files to and from HTM online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
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Convert & download
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What is an HTM file?
An HTM file is a HyperText Markup Language document used to structure web content, functionally identical to HTML files but utilizing a three-letter extension to accommodate legacy file system restrictions. This naming convention originated from the MS-DOS and Windows 3.x FAT file systems, which enforced an 8.3 filename limit (eight characters for the name, three for the extension). The file contains plain text adhering to W3C standards, utilizing tags to define the Document Object Model (DOM) elements such as headers, paragraphs, and embedded media references.
How to open an HTM file
All modern web browsers, including Google Chrome, Mozilla Firefox, Microsoft Edge, and Apple Safari, provide native support for rendering HTM files on any operating system. For editing purposes, the files can be opened in text editors or Integrated Development Environments (IDEs) such as Microsoft Visual Studio Code, Sublime Text, or Adobe Dreamweaver, which offer syntax highlighting for the markup.
HTM Technical Info
- Full Name
- HyperText Markup Language File
- Developed By
- W3C / WHATWG
- Initial Release
- 1991
- MIME Type
- text/html
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