Convert BMP to PNG with Lossless Compression
Turn large BMP bitmap files into compact PNG images in your browser while preserving decoded pixels and dimensions.
Conversion runs locally. Your BMP files never leave this device.
No files selected
Choose BMP files to create PNG output.
How to turn BMP files into PNG
Create PNG files from BMP input in three steps, with clear limits and downloadable output.
Choose BMP files
Add one or more BMP files to the conversion queue.
Convert to PNG
Review the available settings, then start conversion and wait for each file to finish.
Download PNG
Download output files separately or save multiple completed files together as a ZIP.
BMP to PNG converter for .bmp files
Use the available controls to prepare PNG output for your target application.
| Control | Setting | Effect |
|---|---|---|
| Batch queue | Up to 10 files | Processes several source files without repeating the upload workflow |
| File handling | Local browser | Source files never leave this device |
| PNG encoding | Lossless | Reduces size without JPEG artifacts |
| Dimensions | Preserved | Keeps source width and height |
BMP vs PNG image formats
BMP commonly stores simple uncompressed pixels; PNG provides lossless compression and broader web use.
| Characteristic | Source | Output |
|---|---|---|
| Compression | Often uncompressed | Lossless compressed |
| File size | Usually large | Usually smaller |
| Transparency | Varies by BMP version | Alpha supported |
| Web support | Limited | Excellent |
| Best for | Legacy bitmap workflows | Sharing and web graphics |
Convert BMP to PNG without quality loss
Decoded bitmap pixels are re-encoded with PNG lossless compression.
Pixel colors are preserved
No lossy compression is applied.
File size usually drops
PNG compresses repeated and structured pixel data efficiently.
Browser BMP support is required
Unusual legacy BMP variants may not decode.
Metadata is not transferred
Application-specific BMP metadata is omitted.
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BMP to PNG converter FAQ
How do I turn BMP files into PNG?
Choose BMP files above, start the conversion, then download each PNG result or save multiple outputs as a ZIP.
Is this BMP to PNG converter free?
Yes. You can use the displayed file-size and batch limits without payment or account registration.
Are my BMP files uploaded?
No. BMP parsing and PNG encoding run locally in your browser.
Can I batch convert BMP files to PNG?
Yes. Add up to 10 BMP files, convert the queue and download completed PNG files individually or as a ZIP.
Does BMP to PNG lose quality?
No lossy compression is used; decoded pixel colors are stored losslessly.
Why is PNG smaller than BMP?
PNG uses lossless DEFLATE compression while many BMP files store raw pixels.
Does it preserve BMP transparency?
If the browser decoder exposes a valid alpha channel, PNG can preserve it; many BMP variants are opaque.
Can it convert old BMP files?
Common Windows BMP variants work, but uncommon compression modes may not be supported by the browser.
Are dimensions preserved?
Yes, subject to the 50-megapixel safety limit.
Can I use PNG on websites?
Yes. PNG has broad browser support.
Convert BMP to PNG now
Create downloadable PNG output from your BMP files.
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