BMP to ICO Converter
Convert BMP to ICO in your browser. Free, no signup. Conversion files are not uploaded to Format Convertly servers. Learn the formats, then convert when your workflow needs ICO.
Exported at icon sizes, ready to use as a favicon or app tile.
Choose a file or drag and drop
Drop your BMP file here or
Choose file · Drag & drop · Public file link
- Processed on your device
- No conversion file stored on our servers
- Maximum file size: 100 MB
Conversion runs in your browser. Files are not uploaded to Format Convertly servers.
Format comparison
BMP → ICO
- Transparency
- No alpha channel
- No alpha channel
This is a format comparison, not a live conversion preview. Convert a file above to see the real output.
Conversion Settings
Customize the output to match your needs.
Convert Quality
92%Quality slider applies when the target is JPG, WebP, or AVIF.
Resize Image (Optional)
Advanced settings
Additional Options
- Maintain aspect ratio
- Remove metadata (EXIF)Browser re-encoding writes a new file without the original EXIF block.
How to Convert BMP to ICO
Add your BMP
Drop a BMP file into the browser panel. Nothing is sent to a remote queue.
Confirm settings
Review optional quality/size settings, then confirm ICO as the output.
Download ICO
Convert locally and download the ICO file when processing finishes.
Why Convert BMP to ICO?
Private by design
BMP → ICO runs in your browser. Files are not uploaded to a remote conversion queue.
Ready for the next step
Convert when a site, editor, or teammate expects ICO instead of BMP.
Preserve detail
ICO: varies. Typically lossless or lightly transformed for editing and archival use.
Transparency aware
ICO can keep transparent pixels when the source supports them.
BMP vs ICO
A quick side-by-side before you convert — deeper comparison lives on the full guide.
| Feature | BMP | ICO |
|---|---|---|
| Kind | raster image | raster image |
| Compression | varies | varies |
| Lossy / lossless | Lossless / not lossy | Lossless / not lossy |
| Transparency | Not supported / N/A | Supported |
| Best for | Legacy Windows assets; Simple pixel-perfect game or UI sprites from old toolchains | Windows application icons; Classic favicon.ico for websites |
| Typical size | Very large — megabytes even for modest resolutions | Small — usually under a few hundred KB |
| Browser / web support | Technically displayable in some browsers but never preferred — convert first | Favicon ICO is widely requested; not used as a general <img> format |
| Compatibility | Opens everywhere on Windows desktops and in most desktop editors; convert before web or mobile sharing because files are huge | Native on Windows; browsers still request /favicon.ico on many sites |
Choose BMP when…
- Legacy Windows assets
- Simple pixel-perfect game or UI sprites from old toolchains
- Teaching raw bitmap concepts
- Quick conversion source into PNG/JPG
Choose ICO when…
- Windows application icons
- Classic favicon.ico for websites
- Shortcut and installer branding
- Multi-resolution desktop icons
What happens to image quality?
ICO compatibility: Native on Windows; browsers still request /favicon.ico on many sites Exported at icon sizes, ready to use as a favicon or app tile.
Tip
Keep an original copy of your BMP file if you may need to reconvert later.
Does ICO support transparency?
ICO can store transparent pixels — ICO supports transparency (including alpha where the codec/container allows). Keep a format with alpha when you need soft edges or overlays.
ICO format guide →BMP · ICO
Related converters BMP
Related converters ICO
Frequently Asked Questions
More on quality loss: conversion quality guides · problem-solution guides
Does converting BMP to ICO reduce quality?
Often no for lossless or remux-style paths. Quality drops when you re-encode with lossy settings, downscale, or flatten features like transparency.
Can you recover quality after converting?
Not from a lossy output alone. Return to the original master (or a better source). Converting to a lossless format does not resurrect discarded detail.
Where can I learn more about conversion quality?
Browse Format Convertly’s Quality guides for topics like whether conversion reduces quality, JPG↔PNG myths, WebP/MP3/MP4 tradeoffs, recovery limits, and generational loss — each links to the right converter.
What is a BMP file?
BMP is an uncompressed (or lightly packed) Windows bitmap raster image. BMP is a simple pixel grid historically tied to Windows Paint and older games. Files are easy to decode but enormous compared with PNG or JPG, so convert BMP when you need to share, archive, or publish the image.
Is BMP lossy or lossless?
BMP is typically lossless or non-destructive in common use (varies).
What is a ICO file?
ICO is a Windows icon container that can hold multiple raster sizes for app and favicon use. ICO packages one or more bitmaps (and sometimes PNGs) so Windows and browsers can pick the right resolution for a shortcut or favicon. Design in PNG/SVG first, then build an ICO when a platform still requires the classic container.
Is BMP to ICO private?
Yes. The file is processed locally in your browser and is not uploaded to Format Convertly servers.
Will quality always be perfect?
It depends on the formats. Lossy sources cannot regain discarded detail; complex documents may need cleanup after conversion.
Ready to Convert Your Files?
BMP to ICO privately in your browser.