How do I convert BMP to PNG?

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

No. Both formats are lossless, so every pixel is kept exactly.

BMP or PNG: which should I use?

Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Use PNG for screenshots, logos, text graphics and cut-outs. Keep in mind the main drawback of PNG: large files for photographs.

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 PNG 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 PNG — Lossless, With Transparency

Convert BMP to PNG online for a lossless copy that stays sharp when re-saved. No software to install. Preview one free or batch-convert with Premium.

Drop your BMP file or click to browse

Why convert BMP to PNG?

PNG files are usually smaller than BMP for the same picture, so pages load faster and uploads finish sooner.
PNG is supported far more widely than BMP, so the file is easier to open, share and upload.
PNG is made for screenshots, logos, text graphics and cut-outs.

What to expect when converting BMP to PNG

元のBMPファイルは変更されません。新しいPNGのコピーをダウンロードします。
The PNG keeps the pixel dimensions of your BMP.

BMPとPNGの比較

機能	BMP	PNG
氏名	Windowsビットマップ	Portable Network Graphics
由来	Created by Microsoft for Windows	Published as a W3C standard in 1996
圧縮	非圧縮	ロスレス
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	いいえ
色	1,670万色（24ビット）	チャンネルあたり最大16ビット
開けるアプリ	Windows and macOS apps, older software and browsers	All browsers, phones, computers and image editors
こんな方に最適	older Windows programs, embedded devices and tools that need raw pixels	screenshots, logos, text graphics and cut-outs
主な欠点	very large files and no transparency	large files for photographs

In short: choose BMP for older Windows programs, embedded devices and tools that need raw pixels; choose PNG for screenshots, logos, text graphics and cut-outs.

Frequently asked questions

How do I convert BMP to PNG?: Upload your BMP file above. It is converted to PNG 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 PNG lose quality?: No. Both formats are lossless, so every pixel is kept exactly.
BMP or PNG: which should I use?: Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Use PNG for screenshots, logos, text graphics and cut-outs. Keep in mind the main drawback of PNG: large files for photographs.
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 PNG 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PNG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 PNG online
Keep every pixel with lossless PNG output
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PNG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）。