How do I convert ICO to BMP?

Upload your ICO 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 ICO to BMP lose quality?

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

Will the BMP keep the transparent background?

No. BMP can’t store transparency, so transparent areas are filled with the background colour you pick in Settings (white by default).

An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.

Is the ICO 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 ICO to BMP — Uncompressed Bitmaps

Convert ICO 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 ICO file or click to browse

Why convert ICO to BMP?

BMP is made for older Windows programs, embedded devices and tools that need raw pixels.
BMP needs no decoding, so very simple or older software can display it.

What to expect when converting ICO to BMP

BMP can’t store transparency, so transparent areas are filled with the background colour you pick in Settings (white by default).
Your original ICO file isn’t changed: you download a new BMP copy.

ICO vs BMP

機能	ICO	BMP
氏名	Windows Icon	Windows Bitmap
Origin	Created by Microsoft for Windows icons	Created by Microsoft for Windows
圧縮	Lossless images at several sizes	Uncompressed
Transparency	Yes — smooth, partial transparency	No (in the 24-bit BMPs most apps read)
アニメーション	いいえ	いいえ
色	Full colour with transparency	16.7 million colours (24-bit)
Where it opens	Browsers (as favicon.ico), Windows and icon editors	Windows and macOS apps, older software and browsers
こんな方に最適	website favicons and Windows app or shortcut icons	older Windows programs, embedded devices and tools that need raw pixels
Main drawback	icons are square and at most 256 × 256 pixels	very large files and no transparency

In short: choose ICO for website favicons and Windows app or shortcut icons; choose BMP for older Windows programs, embedded devices and tools that need raw pixels.

Frequently asked questions

How do I convert ICO to BMP?: Upload your ICO 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 ICO to BMP lose quality?: No. Both formats are lossless, so every pixel is kept exactly.
Will the BMP keep the transparent background?: No. BMP can’t store transparency, so transparent areas are filled with the background colour you pick in Settings (white by default).
ICO or BMP: which should I use?: Use ICO for website favicons and Windows app or shortcut icons. 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.
What is a ICO file?: An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.
Is the ICO 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.

ICO to BMP 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 ICO files to BMP online
Fill transparent areas with a background colour of your choice
Switch to any other output format in Settings
Batch-convert many ICO 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

ICO to BMP 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).