BMP to PNG

Turn BMP files into lossless PNG images, right in your browser.

Drop BMP files here or click to browse

Processing happens on your device. Nothing is uploaded.

100% Private

Files are processed locally in your browser. They never touch our servers.

Smart Defaults

Sensible settings are applied automatically. Fine tune them only if you want to.

Batch Processing

Drop multiple images at once and download everything together as a ZIP.

How to use BMP to PNG

Drop your images onto the page, or click to pick them from your device
Use the default settings, or adjust the options for your file type and target result
Download the finished images one by one, or save the full batch as a ZIP

What BMP to PNG is for

Use this tool when a BMP file is too large or will not load where you need it. It decodes the bitmap in your browser and saves a lossless PNG that is far smaller and opens in every app and browser, with nothing uploaded.

Turn a large BMP bitmap into a smaller, lossless PNG that opens everywhere.
Shrink uncompressed BMP files without losing a single pixel of quality.
Prepare BMP screenshots or graphics for the web as lightweight PNGs.
Batch-convert a folder of BMP files and download them together.

Privacy note: This tool runs locally in your browser. Your selected image files are not uploaded to CompressImage.ca. Read more on our promise page.

Best practices for better results

Image optimization works best when you choose the right balance between file size, visual quality, dimensions, format compatibility and privacy. These tips help you get a cleaner result.

PNG is the best all-round replacement for BMP: lossless and far smaller.
Use PNG when you need to keep transparency or exact pixels.
For photos headed to the web, JPG or WebP will be smaller still.
Keep the BMP original if a workflow ever needs the raw bitmap again.

Convert BMP to PNG in your browser

BMP to PNG is the conversion most people want: a BMP bitmap is uncompressed and often huge, while PNG keeps the exact same pixels losslessly at a fraction of the size. The converted PNG opens in every app, editor and browser, and your files never leave your device.

HOW TO CONVERT BMP TO PNG

Drop one or more .bmp files onto the upload area, or click to browse
Remove anything from the batch list you did not mean to add
Click Convert; PNG is lossless, so there are no settings to tweak
Download each PNG on its own, or grab the whole batch at once

BMP vs PNG at a glance

	BMP	PNG
Compression	None	Lossless
Typical size	Very large	Much smaller
Quality	Perfect	Perfect (identical)
Transparency	No	Yes
Web friendly	No	Yes

When PNG is the right choice

You want a smaller file with no quality loss at all
You need transparency, which standard BMP cannot store
The image is a screenshot, logo or graphic headed for the web

For photos where the smallest possible file matters more than perfect pixels, BMP to JPG or BMP to WebP go smaller still. Need to go the other way? Use PNG to BMP.

Related image tools

These tools solve similar image optimization problems and work the same way: locally in your browser, with no required upload.

JXL to JPG: Convert JPEG XL files to widely supported JPG
JXL to PNG: Convert JPEG XL files to lossless PNG
JXL to WebP: Convert JPEG XL files to small WebP images
JPG to JXL: Convert JPG photos to next-gen JPEG XL

BMP to PNG FAQ

Does converting BMP to PNG lose quality?

No. PNG is lossless, so every pixel of the BMP is kept exactly. You simply get a much smaller file at identical quality.

Why is the PNG so much smaller than the BMP?

BMP stores pixels with no compression, while PNG applies lossless compression. The image looks identical, but the PNG is typically several times smaller.

Does the PNG keep transparency?

If the source has transparency it is preserved. Standard BMP files are opaque, so most converted images simply have no transparent areas.

Can I convert several BMP files at once?

Yes. Drop a batch and each file is converted locally in your browser, with its own download button plus a download-all option.