Convert BMP to ICO

BMP to ICO converter that runs entirely in your browser. 100% free, no signup, no upload — your files never leave your device. One-click batch conversion.

Conversions

About formats

BMP

BMP (Bitmap) is a simple, largely uncompressed raster image format native to Windows. BMP stores pixel data with optional Run-Length Encoding, making it trivial to read and write, but produces very large files. It remains useful as an intermediate, loss-free working format.

Developer
Microsoft
Initial release
1985
Compression
Uncompressed
Color depth
up to 32-bit
Transparency
Yes
Animation
No

Best for

  • Lossless intermediate image storage
  • Windows-native graphics workflows
  • Simple pixel-data interchange
  • Uncompressed image working copies
  • Legacy Windows application images

Pros

  • +Trivial to read and write
  • +Lossless and uncompressed
  • +Supports up to 32-bit color
  • +No decoding complexity

Cons

  • −Very large file sizes
  • −No compression by default
  • −Not suited for web
  • −No modern features like animation

ICO

ICO is the image container format used for Windows icons and favicons. A single ICO file can bundle multiple sizes and color depths so that the operating system can select the best resolution. ICO is still essential for desktop application icons and website favicons.

Developer
Microsoft
Initial release
1985
Compression
Uncompressed
Color depth
up to 32-bit
Transparency
Yes
Animation
No

Best for

  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images

Pros

  • +Bundles multiple sizes and color depths in one file
  • +Essential for Windows app icons
  • +Supports transparency
  • +OS selects the best resolution automatically

Cons

  • −Limited to icon use cases
  • −Not suited for general photography
  • −Less universal outside Windows
  • −No modern compression

How to convert BMP to ICO

  1. 1

    Select BMP files from your computer, Google Drive, Dropbox, a URL, or by dragging them onto the page.

  2. 2

    Choose ico — or any other format you need as a result (more than 200 formats supported).

  3. 3

    Let the file convert, then download your ico file right away.

BMP vs ICO

PropertyBMPICO
CompressionUncompressedUncompressed
TransparencyYesYes
AnimationNoNo
Color depthup to 32-bitup to 32-bit
Open formatYesYes

When to use BMP vs ICO

BMP

  • Lossless intermediate image storage
  • Windows-native graphics workflows
  • Simple pixel-data interchange
  • Uncompressed image working copies
  • Legacy Windows application images

ICO

  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images

Use cases for BMP → ICO

  • Lossless intermediate image storage
  • Windows-native graphics workflows
  • Simple pixel-data interchange
  • Uncompressed image working copies
  • Legacy Windows application images
  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images

Frequently Asked Questions

Is converting BMP to ICO free?
Yes. This BMP → ICO converter runs entirely in your browser and is completely free — no account, no credits, no watermark.
Which devices and platforms can I use to convert BMP to ICO?
Any modern device with a current web browser: Windows, macOS, Linux, Android, iPhone and iPad. There is nothing to install — the conversion happens locally.
Are my BMP files uploaded to a server?
No. Files never leave your device. The entire BMP → ICO conversion runs locally in your browser, so your data stays private.
Can I convert multiple BMP files at once?
Yes — batch conversion is supported. Add as many BMP files as you like and convert them to ICO in one pass, then download the results together.
What is the maximum file size?
There is no fixed server-side limit because the conversion happens in your browser. Practical limits depend on the available memory and CPU of your device.
Will converting BMP to ICO lose quality?
No. ICO is a lossless format (or used in a lossless mode here), so the original data from your BMP file is preserved bit-for-bit in the converted result.
Will transparency be preserved when converting BMP to ICO?
Yes. Both BMP and ICO support alpha-channel transparency, so transparent areas of your file are kept unchanged in the ICO output.
How will the file size change after converting BMP to ICO?
Both formats use comparable compression, so the ICO output will be similar in size to your BMP file — typically within 10–20% of each other.

Related Conversions

Specific converters

FREE

100% Free

No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.

SIGNUP

No Signup Required

Start converting immediately without creating an account or sharing email address.

PRIVACY

Private & Secure

Your files never leave your device. All processing is completed locally for maximum privacy.

BATCH

Batch Conversion

Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.

LOCAL

Runs in Browser

Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.

FORMATS

200+ Formats

Supports a wide variety of formats including images, documents, audio, video, and more.

USER REVIEWS

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