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カテゴリ 11 カテゴリ

BMP File Format

Bitmap Image category

BMP は Windows の無圧縮ビットマップです。構造が単純で編集しやすい反面、ファイルが非常に大きくなります。レガシーな印刷・産業ソフトで今も使われます。

Typical use: 容量を減らしたい、Web で使いたいときは BMP を PNG や JPG に変換します。

About the BMP format

BMP は無圧縮のビットマップ形式です。構造が単純で画素をそのまま読めるため、画像処理の教材やレガシー機器で今も使われます。

圧縮しないぶん容量は大きく、Web や共有には向きません。扱いやすさを優先して PNG へ変換するのが一般的です。

Strengths

  • ✓ 構造が単純で読み書きしやすい
  • ✓ 画素をそのまま保持
  • ✓ レガシー機器と相性が良い

Limitations

  • ✗ ファイルが非常に大きい
  • ✗ 透明や圧縮に弱い
  • ✗ No role in modern web or print workflows
Compression
Usually none (RLE optional)
Transparency
Rarely (V5 header only)
Animation
Not supported
Metadata
Minimal
Best for
Legacy software and scanner output

Convert BMP to…

54 direct directions plus 15 workflows, sorted A–Z; 🔥 marks popular targets.

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Frequently asked questions

What is a BMP file?

BMP is Windows’ native uncompressed bitmap format. Every pixel is stored exactly as captured, which makes files large but trivially simple to read — common in older software and scanners.

How do I convert BMP files online?

Pick a target format from the "Convert BMP to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.

Is it safe to convert BMP files here?

Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.

Which formats can BMP convert to?

This page lists all 69 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.