BMP to PNG Converter
Convert BMP bitmap images to PNG online for free. Get smaller, web-ready files with lossless quality, converted in your browser - no upload, no sign-up.
Image Studio
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About this tool
Modernize old BMP bitmaps into compact, universally accepted PNGs with zero quality loss. Scans and graphics from the Paint-and-Windows-XP era shrink dramatically and become usable in web pages, documents, and modern editors that treat BMP as a relic.
How to Convert BMP to PNG
- 1
Select the BMP file — an old scan, a Paint drawing, or an export from legacy software.
- 2
The uncompressed bitmap is re-encoded as PNG in your browser; PNG's lossless compression preserves every pixel while collapsing the file size.
- 3
Download the PNG — identical image, small file, accepted everywhere modern.
Why Convert BMP to PNG with Wrklyst
- Old Files Handled Privately
- Vintage scans are often personal — family photos, old documents — and the conversion keeps them on your device throughout.
- Massive Size Reduction, Zero Loss
- PNG compression is lossless, so a 6MB bitmap can become a few hundred kilobytes with pixel-perfect fidelity.
- Bulk Modernization, Free
- Clear out a whole folder of legacy bitmaps without paying per file or creating an account.
Archive Modernization Tips
- Convert your whole legacy folder in one session and reclaim the disk space immediately.
- Verify one converted file opens correctly before deleting any originals — then verify a few more.
- Old scans often carry huge blank margins; crop after converting to save even more space.
- For photos you'll only ever view, a further PNG-to-JPG pass shrinks them again.
Frequently asked questions
Why should I convert my old BMP files?
Three practical wins: storage (PNG is typically 5–20x smaller with identical pixels), compatibility (websites, messaging apps, and CMSs accept PNG but often reject or mishandle BMP), and future-proofing (BMP support keeps shrinking in modern software while PNG is a permanent web standard).
Is any image quality lost in the conversion?
None whatsoever — this is a lossless-to-lossless conversion, the safest kind. PNG's compression works like ZIP: it finds redundancy and encodes it efficiently, reconstructing the exact original pixels on every open. Your scan looks identical down to the last pixel; only the file size changes.
How much smaller will the PNG be?
Content-dependent: graphics, screenshots, and documents with flat areas compress spectacularly — often 90%+ smaller. Photographic scans with continuous grain compress least, perhaps 40–60% smaller. Either way the PNG never exceeds the BMP, since BMP stores everything raw.
Can I convert BMPs saved by very old software?
Almost certainly — BMP's core format has been stable since early Windows, and files from Paint, nineties scanners, and legacy applications decode fine. The rare exceptions are exotic variants like RLE-compressed or unusual bit-depth BMPs from specialized software; standard files, which is nearly all of them, convert without issue.