How do I convert JPG to BMP?

Upload your JPG file above. It is converted to BMP automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.

Does converting JPG to BMP lose quality?

新たな劣化は生じません。BMPは画像をそのままの状態で保存します。JPGの圧縮で以前に失われたディテールは復元できません。

JPGファイルとは？

JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.

Is the JPG to BMP converter free?

Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

Convert JPG to BMP — Uncompressed Bitmaps

Convert JPG to BMP online for an uncompressed bitmap that older apps can read. No software to install. Preview one free or batch-convert with Premium.

Drop your JPG file or click to browse

Why convert JPG to BMP?

BMP is lossless, so the converted image loses no further detail when you edit and save it again.
BMP is made for older Windows programs, embedded devices and tools that need raw pixels.

What to expect when converting JPG to BMP

JPGの圧縮ですでに失われたディテールは、変換しても戻りません。BMPは現在の画像をそのまま正確にコピーしたもので、通常はファイルサイズが大きくなります。
元のJPGファイルは変更されません。新しいBMPのコピーをダウンロードします。

JPGとBMPの比較

機能	JPG	BMP
氏名	JPEG (Joint Photographic Experts Group)	Windowsビットマップ
由来	1992年に標準化	Created by Microsoft for Windows
圧縮	非可逆、画質を調整可能	非圧縮
透過	いいえ	No (in the 24-bit BMPs most apps read)
アニメーション	いいえ	いいえ
色	1,670万色（チャンネルあたり8ビット）	1,670万色（24ビット）
開けるアプリ	All browsers, phones, computers and photo apps	Windows and macOS apps, older software and browsers
こんな方に最適	photos you share, email, print or upload	older Windows programs, embedded devices and tools that need raw pixels
主な欠点	no transparency, and every re-save loses a little more detail	very large files and no transparency

In short: choose JPG for photos you share, email, print or upload; choose BMP for older Windows programs, embedded devices and tools that need raw pixels.

Frequently asked questions

How do I convert JPG to BMP?: Upload your JPG file above. It is converted to BMP automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.
Does converting JPG to BMP lose quality?: 新たな劣化は生じません。BMPは画像をそのままの状態で保存します。JPGの圧縮で以前に失われたディテールは復元できません。
JPG or BMP: which should I use?: Use JPG for photos you share, email, print or upload. Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Keep in mind the main drawback of BMP: very large files and no transparency.
JPGファイルとは？: JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.
Is the JPG to BMP converter free?: Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

JPGからBMPへでできること

始める前に、主な機能を確認してください。

Convert JPG files to BMP online
透明な部分を好きな背景色で塗りつぶします
Switch to any other output format in Settings
Batch-convert many JPG files into one ZIP
Preview the result before you download

このツールを使用する

設定リファレンス

JPGからBMPへで使用可能なコントロール。

設定

出力形式ドロップダウン: Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.オプション: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
品質スライダーレンジ: 20–100 · デフォルト: 90: For JPG, WebP, AVIF and image-to-PDF output: higher keeps more detail but makes a bigger file; 60–80 suits most photos. Documents (Publisher, XPS, EPS…) become PDFs with every page and sharp text, with no quality setting.
ロスレスモードオン/オフ: For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
背景の塗りつぶしカラーピッカー: 透過を保存できないJPG、BMP、画像からPDFへの出力用：透明な部分を塗りつぶす色（既定は白）。