Convert APNG to BMP Online
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Supports: APNG, PNG
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Need help?Convert APNG to BMP Online
APNG (Animated PNG) packs a whole animation into a single PNG-compatible file, while BMP (Windows Bitmap) is a single, uncompressed still image. This converter grabs one frame from your animated APNG — by default the first frame, which is the same image any non-animating viewer shows — and writes it out as a Windows BMP bitmap, the format some legacy Windows apps and imaging SDKs still require.
What Happens When You Convert APNG to BMP
BMP cannot store animation: it holds exactly one static raster image. So an APNG-to-BMP conversion is really a frame grab. Every APNG is a valid PNG whose first embedded frame is the fallback still — that is the frame you get unless you point the conversion at a different one. The animation timing, the extra frames, and any APNG transparency all drop away, because common BMP output is a flat, opaque bitmap. If you need a small lossless still that keeps the alpha channel, convert to PNG instead; pick BMP only when a tool or workflow specifically demands an uncompressed Windows bitmap.
APNG Format at a Glance
| Property | Value |
|---|---|
| Full name | Animated Portable Network Graphics |
| Released | 2004 (Mozilla extension to PNG) |
| Compression | Lossless (DEFLATE), per frame |
| Animation | Yes — multiple frames + timing chunks |
| Transparency | Full 8-bit alpha channel |
| Fallback | First frame renders as a normal PNG in non-APNG viewers |
| Best for | Short lossless animations, animated icons and stickers |
BMP Format at a Glance
| Property | Value |
|---|---|
| Full name | Windows Bitmap (Device-Independent Bitmap) |
| Origin | Microsoft, for Windows and OS/2 (late 1980s) |
| Compression | Usually none; optional RLE on indexed-color images |
| Animation | No — single still image only |
| Bit depth | 1, 2, 4, 8, 16, 24, or 32 bits per pixel |
| Transparency | Alpha exists in V4/V5 headers but most viewers ignore it; treat BMP as opaque |
| Best for | Legacy Windows apps, imaging SDKs, and pipelines that need raw uncompressed pixels |
How to Convert APNG to BMP
- Upload Your APNG File: Drag and drop your
.apngonto the page or click "Upload" to pick it from your computer, Google Drive, or Dropbox. - Confirm BMP as the Output: BMP is already set as the target format for this tool, so the first frame of your APNG becomes a Windows bitmap.
- Set Quality Preset and Image Resolution (Optional): Under Advanced Options, use the Quality preset and Image resolution controls (Keep original, a preset size, or a width/height) to scale the still down — BMP files are large, so resizing is the main way to shrink the output.
- Convert and Download: Click Convert and save your BMP. No sign-up, no watermark. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours.
Frequently Asked Questions
Why does my BMP only show one frame of the animation?
BMP is a single-image format with no way to store animation, so the conversion extracts one frame. By default that is the first frame — the same still a non-animating viewer would display — and the remaining frames are discarded.
Can I keep the transparent background when converting APNG to BMP?
Usually no. Although the BMP V4/V5 headers can technically carry an alpha channel, most Windows apps and viewers ignore it and treat the bitmap as opaque, so an APNG's transparent areas typically flatten to a solid background. If transparency matters, convert to PNG instead, which keeps the full alpha channel.
Why is my BMP file so much larger than the APNG?
BMP stores raw pixels with little or no compression, while APNG uses lossless DEFLATE compression. A single uncompressed 1080p frame can be several megabytes on its own, so a one-frame BMP often dwarfs the entire compressed animation it came from. Lowering the resolution under Advanced Options is the most effective way to keep the file manageable.
Is any image quality lost converting APNG to BMP?
No quality is lost on the extracted frame itself — both APNG frames and a 24-bit BMP are lossless pixel data, so the still is an exact copy. What you lose is everything BMP cannot represent: the other frames, the animation timing, and the alpha transparency.
Which frame does the converter pick, and can I choose a different one?
It defaults to the first frame, which is the APNG's built-in fallback image. In our testing, a typical animated-icon APNG converts to a BMP that matches its opening frame pixel-for-pixel. To capture a later moment instead, convert the APNG to a series of PNG frames first, then turn the frame you want into BMP.
What can actually open a BMP file?
Native Windows tools like Paint and Photo Viewer open BMP, as do cross-platform editors such as GIMP and Photoshop, and browsers including Chrome, Firefox, Edge, and Safari. BMP's main use today is feeding legacy Windows software and imaging SDKs that expect raw, uncompressed bitmaps rather than a compressed format.
Are my uploaded APNG files kept private?
Yes. Files upload over an encrypted (TLS) connection, are processed on our servers, and are deleted automatically after a few hours. There is no sign-up, no watermark, and your images are never shared or made public.