BMP to PNG Converter
Convert large BMP bitmaps to compact, lossless PNG files in your browser. Your files are never uploaded to our servers. ToolkitPoint processes them on your own computer, so confidential documents stay with you.
Processed in your browser. Your files are not uploaded.
How to use BMP to PNG Converter
- "Convert All To" is preset to PNG.
- Select one or more BMP files.
- Convert the files.
- Download each PNG or all of them as a ZIP.
What BMP to PNG Converter does
Convert large BMP bitmaps to compact, lossless PNG files in your browser.
The browser decodes the image and performs the change on a Canvas. ToolkitPoint does not receive the pixels. For BMP to PNG Converter, the operation is specifically to convert large BMP bitmaps to compact, lossless PNG files in your browser.
Worked example
A 1920 x 1080 screenshot.bmp of about 6 MB converts to a lossless screenshot.png that is typically well under 1 MB, pixel for pixel identical.
When BMP to PNG Converter is the right tool
- Shrinking old Windows screenshots and scans before emailing them.
- Converting Paint bitmaps for websites that do not accept BMP.
How to verify the result
Open the download at 100% zoom and confirm dimensions, crop boundaries, transparency, text, and file type. The final BMP to PNG Converter output should visibly match this goal: Convert large BMP bitmaps to compact, lossless PNG files in your browser.
Important limitations
Browser decoding support varies by format. Re-encoding can remove metadata and may change color profiles or introduce lossy compression. This matters here because BMP to PNG Converter is designed to convert large BMP bitmaps to compact, lossless PNG files in your browser, not to repair unrelated source problems.
A free BMP to PNG Converter alternative
People looking for BMP to PNG Converter often compare products such as Canva, Squoosh, TinyPNG. ToolkitPoint is not affiliated with those services. This page keeps convert large bmp bitmaps to compact, lossless png files in your browser free and available without an account; features, limits, and policies on other products can change, so compare their current product pages before choosing.
Last updated: September 28, 2026
Frequently asked questions
Is BMP to PNG lossless?
Yes. PNG compresses without losing any pixel information, so the image looks exactly the same.
Why is the PNG so much smaller?
Most BMP files are stored uncompressed, three bytes for every pixel. PNG packs the same pixels much more tightly.
Are all BMP types supported?
The common 24-bit and 32-bit bitmaps work in every modern browser. Rare compressed or OS/2 variants may not decode; the tool reports which file failed.
Can I convert a whole folder?
Select all the BMP files at once; they convert in a batch and download as a ZIP.
Is it private?
Yes. Everything runs in your browser.