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.

ファイルをここにドロップ、または

ファイルは端末内に残ります

JPG · PNG · WebP · GIF · AVIF · SVG

アップロード不要完全無料ブラウザ内で動作
仕組み

Compress BMP Online ブラウザ内のプライベートな作業向け

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.

よくある用途

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
FAQ

Compress BMP Online よくある質問

このツール、対応ワークフロー、ローカル処理についてのよくある質問です。

アップロード不要無料ブラウザ内処理
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.