BMP to PNG
Convert BMP images to PNG format online. Lossless conversion with smaller file size — fast, private, no upload.
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Use our Universal Image Converter to convert BMP to PNG — supports BMP, AVIF, GIF, ICO, WebP, JPG, and more.
Open Universal Image ConverterWhy Convert BMP to PNG?
Smaller File Size
PNG files are much smaller than BMP.
No Upload
All conversion happens locally in your browser.
Fast Conversion
Convert BMP to PNG in seconds.
Lossless Quality
PNG preserves BMP quality without any loss.
Private
Your images never leave your device.
Transparency
PNG supports transparency if needed.
Last updated
This page doesn't run its own converter — pressing "Open Universal Image Converter" takes you to TryDocsy's shared multi-format tool, where you drop your BMP and pick PNG as the output. That's a deliberate difference from BMP to JPG on this site, which has its own dedicated uploader: converting to PNG instead of JPG matters because PNG is lossless and supports transparency, so a BMP that carries an alpha channel keeps it, whereas the JPG route always flattens transparency to white.
Two practical notes about landing on the shared converter. First, its output format defaults to JPG, not PNG, so you have to click the PNG option in the "Convert To" row before converting — it isn't preselected just because you arrived from this page. Second, its upload limit is 20 MB per file, noticeably smaller than the 100 MB the dedicated BMP to JPG tool allows, because it's built to handle many different formats rather than being tuned for BMP's larger files specifically.
How it works
1. Open the Universal Image Converter
Click "Open Universal Image Converter" — this is the tool that actually performs the BMP-to-PNG conversion.
2. Drop your BMP
Use the "Drop any image here" upload area to add one or more .bmp files, up to 20 MB each.
3. Choose PNG as the output
Click "PNG" in the Convert To row. It isn't selected by default — JPG is.
4. Convert and download
Press "Convert N Image(s) to PNG," then download each result or grab them all as one ZIP.
When you'd use it
Archiving a scanned diagram losslessly
A technical drawing or document scanned as BMP loses fine lines to compression artifacts if you convert it to JPG. Converting to PNG keeps every pixel intact while still shrinking the file from BMP's uncompressed size.
Keeping a transparent icon transparent
If your BMP was exported from an icon or logo tool with a genuine alpha channel, PNG is the format on this page that actually preserves it, since converting to JPG here would flatten it to white instead.
Preparing a BMP screenshot for a wiki or document
Many documentation platforms and content editors accept PNG uploads but not BMP directly. Converting first avoids a rejected embed.
Keeping full pixel fidelity for a diagram or chart
Charts, UI mockups, and line art with sharp edges show JPG's compression artifacts clearly around those edges. Converting the same BMP to PNG avoids introducing any artifacts at all.
Why this page opens a different tool
Rather than building a separate uploader for every possible format pairing, TryDocsy routes less common conversion combinations like BMP to PNG through one shared Universal Image Converter that handles JPG, PNG, and WEBP as output for any of several input formats. The trade-off is that you land on a more general interface than the dedicated BMP to JPG page, and need to pick your output format explicitly rather than have it chosen for you.
Transparency is kept here, unlike converting to JPG
The converter only paints a solid background before drawing your image for output formats that can't represent transparency, such as JPG. PNG isn't one of those formats, so when you pick PNG as the output, the canvas starts fully transparent and stays that way wherever your BMP had an alpha channel. That's the main reason to choose this page over BMP to JPG when your source file actually has transparent areas worth keeping.
Lossless output means no quality slider
Because PNG doesn't compress lossily, the quality slider that appears for JPG or WEBP output on the Universal Image Converter doesn't show up once you select PNG — there's nothing for it to control. The trade-off for that lossless fidelity is file size: a PNG of a photographic BMP will generally be larger than the same image saved as a JPG, since nothing about the pixel data is thrown away during encoding.
Frequently asked questions
Why do I end up on a page called Universal Image Converter?
BMP to PNG doesn't have its own dedicated uploader on this site; it shares the same multi-format converter used for several other format pairs, so clicking through takes you there instead of a standalone tool.
Do I need to change anything after uploading my BMP?
Yes — click "PNG" in the Convert To row. The converter opens with JPG selected by default regardless of which page linked you there.
Will my BMP's transparency be kept in the PNG?
Yes. Choosing PNG as the output leaves the canvas transparent wherever your source image had an alpha channel, unlike converting to JPG, which always fills transparent areas with white.
How large a BMP file can I upload here?
Up to 20 MB per file through the Universal Image Converter — smaller than the 100 MB the dedicated BMP to JPG tool allows, since this converter is built for many formats at once rather than tuned for BMP specifically.
Can I convert several BMP files to PNG in one batch?
Yes. Upload multiple files, convert them together, and download the results individually or as a single ZIP archive.
Should I convert to PNG or to JPG?
Pick PNG when you need lossless quality or transparency, such as diagrams, icons, or scanned text. Pick JPG when file size matters more than perfect fidelity, such as photographic BMPs you just need to shrink.