Compress BMP Online

A BMP is raw pixels written to disk with essentially no codec behind them, which makes it the single most compressible image format in common use — a modern re-encode routinely removes ninety percent or more of the weight. That number is not the encoder being clever; it is the format having never compressed anything in the first place. The only genuine question is which container the pixels land in next.

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Current limit: up to 50 files · 1024 MB per file. Options vary by format.

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Frequently Asked Questions About Image Compression

Why are BMP files so huge?

The format stores pixels directly with little or no compression: a 12-megapixel photo is roughly 36 MB before any encoder gets a chance at it.

Does converting a BMP lose quality?

To PNG, no — that is a lossless repack. To WebP or AVIF the picture is requantised, so keep the BMP as the master copy.

Will my original file be changed?

The result is downloaded as a separate file. Keep your original until you have checked the Smaller BMP.

What should I check before using the result?

Open the Smaller BMP in the application that consumes it and spot-check the parts that matter to you; the original file stays untouched if you need to re-run with different options.

Is Compress BMP Online free?

Yes. The compress JPG is free with no trial limit, subscription, or watermark on downloads. Use it for personal and commercial projects without creating an account.

Are my files safe when I compress online?

Many tools on FileCompress process files in your browser so data never leaves your device. When server processing is used, files travel over encrypted connections and are deleted after the job completes.