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
- Your original BMP file isn’t changed: you download a new PNG copy.
- The PNG keeps the pixel dimensions of your BMP.
BMP vs PNG
| 機能 | BMP | PNG |
|---|---|---|
| 氏名 | Windows Bitmap | Portable Network Graphics |
| Origin | Created by Microsoft for Windows | Published as a W3C standard in 1996 |
| 圧縮 | Uncompressed | Lossless |
| Transparency | 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 | 16.7 million colours (24-bit) | Up to 16 bits per channel |
| Where it opens | 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 |
| Main drawback | 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.
- What is a BMP file?
- BMP stores pixels with no compression at all. Files are large, but very old or simple software that can’t read modern formats can usually read a BMP.
- 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 to PNG 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
設定リファレンス
5 設定
BMP to PNG 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
- For JPG, BMP and image-to-PDF output, which can’t store transparency: the colour that fills transparent areas (white by default).
モード
- 単一ファイル / バッチドロップダウン
- 共有設定を使用して 1 つのファイルまたはバッチを処理します。バッチ結果は 1 つの ZIP としてダウンロードされます。オプション: 単一ファイル一括処理
無料で利用可能 · 登録不要 · 透かしなしアップロードは転送中に暗号化されます保持ポリシーに基づいて削除されました
Related tools for BMP to PNG
Tools for common next steps after BMP to PNG.
変換結果を一つずつ確認
すべての写真はスラッシュをそのまま通過し、反対側が完成して出てきます。
