Step 1: Supply your AVI files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted BMP files.
AVI to BMP Conversion FAQ
What does the AVI to BMP converter do?
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It converts a AVI file into BMP format.
Will background and colour fidelity be preserved?
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Neither AVI nor BMP carries an alpha channel, so the background renders as a solid colour and pixel colour data is preserved end-to-end.
Is the AVI to BMP conversion reversible?
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You can convert the BMP back to AVI on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
Will the BMP be larger than the AVI?
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Yes — lossless containers store every byte. Expect the BMP to be 3-8x the size of the AVI. The benefit is no further quality loss on editing or re-encoding.
Why do my extracted frames have horizontal lines through them?
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Because the source is interlaced. AVI content from the broadcast and DVD era stores two half-height fields per frame, captured a fiftieth of a second apart, and a still pulled straight out shows both woven together as combing on anything that moved. Enable deinterlacing before extraction and each still is built from a single reconstructed progressive frame. AVI is Microsoft’s Audio Video Interleave, introduced in 1992 on top of the RIFF chunk format — one of the oldest containers still in circulation.
Which frame of the AVI do I actually get as a BMP?
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The one you point at, not just the first. A timestamp picks a single moment out of the AVI; an interval setting walks the whole video and returns one BMP per step, delivered as a ZIP. The default grabs a frame a few seconds in rather than at 00:00, because the opening frame of a video is very often black.
How big will the BMP files be?
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Larger than you might expect, because BMP keeps every pixel exactly rather than approximating. A 1080p still lands around 2-5 MB and a 4K still around 6-15 MB, so a long extraction run adds up quickly. That is the right trade when the images feed further processing, and the wrong one when they are going straight onto a web page. BMP usually stores completely uncompressed pixel rows with a small header, which is why it is so simple to parse.
Will a very large AVI file upload successfully?
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Free accounts cap at 100 MB per file, and AVI sources run large because the format carries substantial per-chunk overhead on top of the video data. Premium lifts the cap considerably. If the file is split into numbered parts because of the format ceiling, upload them together and they are treated as one job. AVI has no native support for modern codecs, variable frame rate, soft subtitles or files over 4 GB without hacks, and its per-chunk overhead bloats the file.
Is there a file-size limit when converting AVI to BMP?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several AVI files to BMP at once?
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Yes. Drop or pick multiple AVI files in one upload — the converter processes them in parallel and returns a ZIP of the BMP results. There is no need to repeat the upload step per file.
What happens to my AVI files after the conversion?
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Uploaded files and BMP outputs are auto-deleted after a short retention window. We do not inspect, share, or train on user files. Direct download links are time-limited and tied to your session.
Where can I open a BMP file?
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BMP opens in mainstream image viewers and editors. For web embedding, consider converting to PNG or WebP first since BMP is not always natively supported in browsers.
