Image guides
How to Convert AVIF to BMP in Your Browser
Converting an AVIF image to BMP produces an uncompressed 24-bit bitmap that older Windows software and some print or legacy pipelines expect. This guide covers the steps and what to know about transparency and file size.
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Step-by-step conversion
- Open /tools/avif-to-bmp.
- Choose an AVIF file — the content is validated before conversion, not just the filename or extension.
- Select Convert & download.
- Save the .bmp file from your browser downloads.
Transparency and file size
BMP output here is 24-bit RGB with no alpha channel, so transparent pixels are flattened onto a white background, the same convention used for JPG output. Because BMP is uncompressed, the resulting file is usually larger than the source.
Source-specific behavior
Animated AVIF files convert as a still image — only the first decodable frame is used, and AVIF decoding itself depends on your browser.
Privacy
Conversion runs locally in your browser. The file is not uploaded to Looty Tools servers for this workflow.
Convert AVIF to BMP FAQ
- Why would I need BMP instead of AVIF?
- Some older Windows software, print workflows, or legacy tooling specifically expects an uncompressed BMP file.
- Does every browser support AVIF?
- No. AVIF decoding depends on your browser. Unsupported browsers show a clear decode error instead of a mislabeled download.
- Does BMP output keep transparency?
- BMP output here is 24-bit RGB with no alpha channel, so transparent pixels are flattened onto a white background, the same convention used for JPG output. Because BMP is uncompressed, the resulting file is usually larger than the source.
- Are my files uploaded?
- No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.
- What is validated before conversion?
- The file must actually be an AVIF — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.