BMP to PNG Converter

Why use this BMP to PNG?

Convert BMP to PNG online with secure cloud processing. Replace bulky bitmap storage with a lossless, widely supported PNG. Free to start; no software needed.

Best source settings for the BMP to PNG

Choose settings that match the result you need.

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Upload your BMP file

Drag and drop or browse to a .bmp file — up to 20 MB for anonymous use, 50 MB with a free account, or 200 MB on a paid plan. The upload is sent over HTTPS.

Automatic lossless conversion

There is nothing to configure. The uncompressed BMP bitmap is decoded — including both standard bottom-up and top-down (negative-height) variants — and re-encoded as a lossless PNG, shrinking the file dramatically while keeping every pixel.

BMP to PNG input and output

Review what the tool accepts, how it processes the file, and what it produces.

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Where to use files from the BMP to PNG

The output is ready for common workflows supported by its format.

Dramatic size reduction, zero quality loss

BMP stores pixels with no compression at all, so converting to lossless PNG typically shrinks files by 50–90% while keeping every pixel exactly the same.

Fully automatic, no settings

There are no options to configure — upload your bitmap and get a converted PNG back in seconds, including files saved bottom-up or top-down.

Your files stay private

Uploads travel over HTTPS, converted outputs are auto-deleted within 24 hours, and uploaded BMPs are removed within 6–24 hours.

Free to use

Anonymous visitors get 1 free server conversion up to 20 MB; a free account adds 3 conversions every 30 days at 50 MB with batches of 5.

BMP to PNG troubleshooting

My file won't upload

Check that the file really is a Windows bitmap with a .bmp extension. Files renamed from other formats are rejected — re-export as BMP from your editor if unsure.

Upload rejected for being too large

BMP files are uncompressed and get big fast. Anonymous uploads are capped at 20 MB; sign in for 50 MB free, or upgrade for files up to 200 MB.

Colors look wrong in the PNG

Rare BMP variants (16-bit or exotic palette encodings) can decode with shifted colors. Open the file in an image editor, re-save it as a standard 24-bit BMP and convert again.

FAQ

Why convert BMP to PNG?

BMP is an uncompressed Windows bitmap format, so files are huge. PNG stores the exact same pixels with lossless compression, typically shrinking files massively while staying web-friendly.

Does the conversion lose quality?

No. PNG is lossless, so every pixel of your BMP is preserved exactly — only the file size changes.

Is my BMP file private?

Yes. Files are uploaded over HTTPS, converted outputs are auto-deleted within 24 hours, and uploaded inputs are removed within 6–24 hours.

What are the size and usage limits?

Anonymous users get 1 free server conversion up to 20 MB. A free account allows 50 MB files, 3 conversions per 30 days and batches of 5. Paid users get 200 MB files and batches of 100.

How much smaller will the PNG be than my BMP?

It depends on the image, but BMP stores every pixel with no compression at all, so PNG — which compresses losslessly — is very often 50–90% smaller, especially for images with flat colors or large plain areas.

I had trouble with a BMP before — will it convert now?

Yes. Our decoder correctly handles both standard bottom-up BMP files and top-down (negative-height) BMP files, a variant that trips up many converters.

Can I convert several BMP files to PNG at once?

Yes, in a batch. Free accounts can batch up to 5 files at a time; paid accounts up to 100. Anonymous users convert one file per free server conversion.