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    Reduce a HTM file

    Compress HTM files (shortened HTML extension inherited from Windows).

    Accepted source formats

    HTM

    How it works

    1

    Drop your HTM.

    2

    Choose minification (whitespace/comment removal) and/or Gzip compression.

    3

    Download the optimized HTM, still perfectly readable by all browsers.

    Common mistakes

    • Using a source file of poor quality.
    • Publishing without checking the final result.
    • Confusing file size, dimensions and quality.
    • Overwriting the original file without keeping a copy.

    Pro tips

    • Always keep an original version.
    • Test several settings before downloading.
    • Use WebP for the web when possible.
    • Choose descriptive file names for SEO.

    Privacy and file handling

    File handling depends on the selected tool and format. For sensitive files, review the tool information before starting the operation.

    How to convert a HTM file to Reduce a HTM file?

    Drag and drop or select your HTM file from your device. Click "Convert" and wait a few seconds. Get your converted Reduce a HTM file file instantly. Current quotas and higher plans are shown on the Pricing page. The result depends on what the HTM and Reduce a HTM file formats can preserve.

    Supported formats

    Source format: HTM. Target format: Reduce a HTM file. A quick check can prevent problems later. Always check the output file before sharing it. After processing, open the output and review its content, pages, layout and other important elements before continuing with the rest of your work.

    What is the maximum HTM file size?

    The practical file-size limit depends on the format, browser and memory available on your device. If a file fails, try a smaller version or split it when the tool supports that workflow. Some elements may change during conversion, so open the output and check it before using or sharing it.

    Which browsers are compatible?

    Use a recent, up-to-date browser. Behaviour can vary with the file format, available memory and the features supported by your device. Always check the output file before sharing it. The final format should match how you plan to use it. Keep the original until you have approved the result.

    Can I use the tool on mobile?

    You can try the tool on a phone or tablet with a recent browser. Large files may require more memory or be easier to process on a desktop computer. The final format should match how you plan to use it. A quick check can prevent problems later. Convert HTM files to Reduce a HTM file online.

    Discover all our tools

    Convert, compress, merge and edit your files in a few clicks.

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    Complementary tools

    Guides and tutorials

    Learn how to use our tools with our detailed guides.

    Frequently asked questions

    No, technically identical. HTM is simply the shortened 3-char extension used on Windows 3.x/95 when longer extensions weren't supported.

    No, browsers ignore multiple whitespace and HTML comments: the rendered page is visually identical. Minification saves 20-40% of weight based on source verbosity.

    Yes, our tool keeps the original extension by default. You can optionally change to .html if you prefer the modern name.

    Minification alone: 15-30%. Minification + Gzip: 60-80% on a full HTML (with inline CSS/JS). It's what any modern web server (Nginx, Apache) does automatically in production.

    A minified HTM stays openable by direct double-click in the browser. A Gzip HTM needs a server sending the `Content-Encoding: gzip` header — for local use, prefer minification alone.
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