How do I convert BMP to WebP?

Upload your BMP file above. It is converted to WebP 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 BMP to WebP lose quality?

WebP is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.

BMPファイルとは？

BMPはピクセルをまったく圧縮せずに保存します。ファイルは大きくなりますが、最新の形式を読み込めない非常に古いソフトや簡易なソフトでも、たいていBMPなら読み込めます。

Is the BMP to WebP 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 BMP to WebP — Smaller Images for Faster Sites

Convert BMP to WebP online for smaller, faster-loading web images. No software to install. Preview one free or batch-convert with Premium.

Drop your BMP file or click to browse

Why convert BMP to WebP?

WebP files are usually smaller than BMP for the same picture, so pages load faster and uploads finish sooner.
WebP is made for websites, online stores and blogs that need fast-loading images.

What to expect when converting BMP to WebP

WebP uses lossy compression by default; raise the quality or switch on lossless in Settings for a closer copy.
元のBMPファイルは変更されません。新しいWebPのコピーをダウンロードします。

BMPとWebPの比較

機能	BMP	WebP
氏名	Windowsビットマップ	WebP
由来	Created by Microsoft for Windows	Released by Google in 2010
圧縮	非圧縮	非可逆または可逆
透過	No (in the 24-bit BMPs most apps read)	Yes — smooth, partial transparency
アニメーション	いいえ	はい
色	1,670万色（24ビット）	チャンネルあたり8ビット
開けるアプリ	Windows and macOS apps, older software and browsers	All current browsers; some older desktop apps and upload forms reject it
こんな方に最適	older Windows programs, embedded devices and tools that need raw pixels	websites, online stores and blogs that need fast-loading images
主な欠点	very large files and no transparency	古いアプリや一部のアップロードフォームでは受け付けられない

In short: choose BMP for older Windows programs, embedded devices and tools that need raw pixels; choose WebP for websites, online stores and blogs that need fast-loading images.

Frequently asked questions

How do I convert BMP to WebP?: Upload your BMP file above. It is converted to WebP 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 BMP to WebP lose quality?: WebP is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.
BMP or WebP: which should I use?: Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Use WebP for websites, online stores and blogs that need fast-loading images. Keep in mind the main drawback of WebP: older apps and some upload forms don't accept it.
BMPファイルとは？: BMPはピクセルをまったく圧縮せずに保存します。ファイルは大きくなりますが、最新の形式を読み込めない非常に古いソフトや簡易なソフトでも、たいていBMPなら読み込めます。
Is the BMP to WebP 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.

BMPからWebP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 BMP files to WebP online
Choose WebP quality or switch to lossless
Switch to any other output format in Settings
Batch-convert many BMP 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

BMPからWebP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）。