Compress BMP Online

Reduce BMP file size for email, web publishing and storage. BMP files are uncompressed and very large. LessMB converts and compresses them locally in your browser.

拖放文件到此处，或

文件保留在你的设备上

JPG · PNG · WebP · GIF · AVIF · SVG

无需上传永久免费浏览器内运行
工作方式

Compress BMP Online 适合私密的浏览器工作流

Massive size reduction

BMP files store uncompressed pixel data, making them 10-20x larger than equivalent JPEG. Converting to modern formats saves significant space.

Choose the right output

Use JPEG for photos, WebP for modern web delivery, or PNG for lossless quality with transparency.

Local browser processing

Your BMP file is processed entirely in your browser. No server upload is needed.

常见用途

Convert old BMP files from Windows applications to compressed modern formats.

Legacy files

Make BMP images web-ready by converting to JPEG or WebP.

Web publishing

Reduce BMP file sizes to fit email attachment limits.

Email sharing

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常见问题

Compress BMP Online 常见问题解答

关于此工具、支持流程和本地浏览器处理的常见问题回答。

无需上传免费工具浏览器处理
Can I compress BMP files for free?

Yes. LessMB processes BMP files for free in your browser without requiring an account.

How much smaller will the file be?

Converting BMP to JPEG typically reduces file size by 90-95% because BMP stores uncompressed data.

Are files uploaded?

No. Processing runs locally in your browser session.