Choose a BMP file
Drop a BMP into the converter, or open the built-in demo. The browser decodes the file locally.
Lossless, compressed PNG from BMP
BMP to PNG Converter
Convert BMP to PNG online to keep every pixel while cutting the file size. This BMP to PNG converter runs locally in your browser — no upload, no signup.
No uploadNo signupNo watermarkJPG · PNG · WebP
Drop a BMP image here
BMP · Up to 100 MB · Max 24 MP
Output—
Format—
Saved—
Real converted output
See what this bmp to png converter produces
These examples show the same 1200 × 800 source before and after conversion. Captions state the real file sizes produced locally with the settings described.
Three quick steps
How to convert BMP to PNG online
The converter keeps the common path visible and previews the real result before you download. No upload, no queue, no account.
Convert losslessly
PNG output is lossless, so no quality slider is used. The pixels from the BMP are preserved exactly.
Download the PNG
Verify the preview and download a separate PNG file. The original BMP remains unchanged.
Format comparison
BMP vs PNG: what changes
Understanding the tradeoff prevents surprises. This table shows what the conversion changes and what stays the same.
| Feature | BMP | After conversion to PNG |
|---|---|---|
| Compression | Uncompressed | Lossless |
| Transparency | No | Yes |
| Typical file size | Very large | Largest |
| Best for | Legacy files and exact pixels | Graphics, logos, sharp text |
| Format | Compression | Transparency | Best starting use |
|---|---|---|---|
| JPG | Lossy with quality control | No | Photos, compatibility, small files |
| PNG | Lossless | Yes | Graphics, logos, sharp text, edits |
| WebP | Lossy or lossless | Yes | Compact modern web images |
Honest answer
Why convert BMP to PNG if both are lossless?
Both formats keep every pixel, but PNG compresses the data while BMP stores it almost raw. Converting BMP to PNG keeps the exact same pixels in a file that is usually much smaller.
PNG is also supported everywhere BMP is, and it adds features like true alpha transparency that BMP rarely uses. For graphics and screenshots, PNG is the better lossless format.
Practical jobs
When converting BMP to PNG is the right move
These are the common situations where the conversion actually saves time, bandwidth, or compatibility headaches.
Smaller lossless files
PNG compresses BMP data well. Convert BMP to PNG when you need lossless pixels without the BMP bloat.
Icons and screenshots
PNG keeps crisp edges and supports transparency. Convert BMP to PNG for modern interface assets.
Edit-friendly masters
PNG re-encodes without adding artifacts. Convert BMP to PNG for a portable lossless master.
Web graphics
PNG opens everywhere. Convert BMP to PNG before placing a graphic on a web page.
Know the limits
What this bmp to png converter does not promise
The BMP-to-PNG converter works on the pixels you provide; it does not repair damaged sources, upscale small files, or add detail. Re-encoding to a lossy format removes information, and converting the same file repeatedly never makes it cleaner.
Browser encoders vary slightly, and very large images can strain memory on older phones. Keep your original, inspect text and edges in the preview, and never rely on a format conversion to hide or redact private content.
Continue the workflow
More image tools and converters
Researched questions
bmp to png converter FAQ
Direct answers about cost, privacy, file size, quality, transparency, mobile use, and when to keep the original format.
Is this BMP to PNG converter free?
Yes. The converter is free with no account, subscription, watermark, or daily limit, and it runs entirely in your browser.
Does converting BMP to PNG lose quality?
No. PNG is lossless, so every pixel from the BMP is preserved exactly.
Why is the PNG smaller than the BMP?
BMP stores pixels with little compression. PNG compresses the same lossless data, so it is usually much smaller.
How do I convert BMP to PNG online?
Drop the BMP into the converter and download the PNG. Processing happens locally in this browser tab, and no quality slider is needed because PNG is lossless.
Can BMP to PNG keep transparency?
Most BMP files are opaque. If the BMP stores an alpha channel, PNG preserves it; otherwise the output is fully opaque.
Are my images uploaded to a server?
No. The BMP is decoded and re-encoded inside this browser tab. There is no upload endpoint.
What is the maximum file size?
BMP files up to 100 MB are accepted. Because BMP is uncompressed, even a moderate image can already be large.
Can I convert several BMP files at once?
This converter handles one file at a time. Local processing makes a short batch quick.
When should I use BMP to JPG instead?
Use JPG for photos where a much smaller file matters more than lossless pixels. Use PNG for graphics, edits, and anything needing transparency.
Ready when you are
Convert BMP to PNG privately
Choose a file, adjust the output, and download the converted image. No upload, no signup, no watermark.