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convertexa

BMP → PNG

BMP to PNG converter

convertexa converts BMP files to PNG locally in your browser using a dedicated image-canvas engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.

  • Free, no sign-up
  • Nothing is uploaded
  • Works offline
Quality
Lossless
Runs
In your browser
Max input
40 MB
Status
stable

Drop a file to convert

Everything happens on your device — nothing is uploaded.

or paste with Ctrl+V

How to convert BMP to PNG

  1. 1 Drop your BMP file here.
  2. 2 Choose PNG as the output format and adjust the options.
  3. 3 Convert and download the result.

About BMP and PNG

BMP is an uncompressed format, so files are large but universally readable.

PNG output is lossless and keeps the alpha channel intact.

BMP files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.

Limitations

  • The conversion runs in your browser, so very large files can exhaust the memory available to the tab.

Frequently asked questions

How do I convert a BMP file to PNG?

Add your BMP file to the box above. convertexa detects the format from the file content, applies the BMP to PNG conversion and gives you the result to download. The whole operation runs inside your browser.

Are my BMP files uploaded anywhere?

No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.

Is the BMP to PNG conversion lossless?

Yes. This conversion preserves all of the source data, so the PNG file is equivalent to the original BMP file.

Is there a size limit?

For reliable results keep the input under 40 MB. Very large files run out of memory in the browser rather than failing quietly.

Which browsers are supported?

Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.