Convert BMP to PNG
Store a bitmap in a lossless compressed format for ordinary viewing and editing. Actual size savings depend on the image content.
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How to convert BMP to PNG online
- Select a supported BMP file from your device and check its detected type and size.
- Review the output details and file limits. This tool uses fixed settings, so no settings dialog is needed.
- Choose Convert and wait for the result. A queued job is waiting for a processing slot; a processing job is being handled.
- Download the result and open it in the application where you will use it. Keep the original and remove the server copy when finished.
What you will download
One still PNG image. The first frame or TIFF page is used; source metadata is removed.
Route-specific checks
This route is useful when a bitmap must become a lossless, broadly editable PNG. Repeated pixels can compress well, but no size reduction is guaranteed and BMP color data is normalized into the ordinary still-image output. Verify dimensions and transparency expectations in the receiving editor.
Available settings
This tool uses fixed output settings; there are no optional settings to change.
Understand your file formats
- BMP is a bitmap format used by some older desktop applications.
- PNG is a lossless format useful for screenshots, diagrams and transparent artwork.
BMP vs PNG: what changes?
- Use BMP mainly for legacy bitmap workflows; convert to a compressed format when compatibility allows and file size matters.
- Use PNG when lossless pixels, screenshots, interface graphics or supported transparency matter more than the smallest possible file.
Technical format comparison: BMP vs PNG
These properties describe the formats and the behavior implemented by this route. They are a decision aid, not a promise that two applications render every file identically.
| Format or operation | Format category | Compression behavior | Transparency support | Multi-page or animation behavior in ConverterZap | Typical best use |
|---|---|---|---|---|---|
| BMP | Raster image | Typically uncompressed bitmap | No in ConverterZap BMP output | Still image; first frame/page is used | Use BMP mainly for legacy bitmap workflows; convert to a compressed format when compatibility allows and file size matters. |
| PNG | Raster image | Lossless DEFLATE compression | Yes; supported alpha is kept except when output is flattened to PDF/JPEG | Still image; the first frame is used | Use PNG when lossless pixels, screenshots, interface graphics or supported transparency matter more than the smallest possible file. |
Explore the file formats
Need another direction or a different output? Use the format guides to see only the conversion routes that are currently published.
About your output
BMP files often occupy more storage than compressed image formats. PNG preserves pixel detail but photographs can produce large files. Up to 24 megapixels. The first frame/page is used. EXIF orientation is applied; metadata is removed. JPEG has a white background. HDR and wide-gamut colors are converted to 8-bit RGB; color appearance may change.
Questions about BMP to PNG
Will converting BMP to PNG always make the file smaller?
No fixed reduction is guaranteed. PNG compresses pixel patterns, and the result depends on the image and original bitmap encoding. Compare the output size after conversion.
What format detail changes from BMP to PNG?
BMP uses Typically uncompressed bitmap; PNG uses Lossless DEFLATE compression. The conversion writes a new encoded file, so compare transparency, color and file size in the destination workflow.
Which real-world check matters before I share this PNG file?
Open the downloaded result in the application that will receive it and check the behavior described in the limits: Up to 24 megapixels. The first frame/page is used. EXIF orientation is applied; metadata is removed. JPEG has a white background. HDR and wide-gamut colors are converted to 8-bit RGB; color appearance may change.