01
Right-sized output for the use case
Converting from ICO to BMP aligns the file with the encoding choices the downstream pipeline expects. The result is a deliverable that fits naturally into the destination workflow.
100% local
IMAGE
Convert ICO
to BMP
Right-sized output for the use case.
Converting from ICO to BMP aligns the file with the encoding choices the downstream pipeline expects. The result is a deliverable that fits naturally into the destination workflow.
— Drop area
WHY CONVERT
Why convert ICO to BMP
02
Broader cross-platform support
BMP is accepted by a wider range of image viewers, editors, and content systems than ICO. The conversion removes a recurring compatibility friction without changing what the file actually contains.
03
Portable, predictable file format
BMP is well documented and decodable by long-lived tooling, which matters for archives, deliverables, and any file that needs to outlive the software that created it.
— How to convert
ICO to BMP in three steps.
- 01
Open LocalConvert
Visit this page on any modern browser — no install, no signup, no plugin.
- 02
Drop or select your ICO file
Drag your ICO into the drop area, or click to pick one from your device.
- 03
Click Convert
Conversion runs entirely in your browser. When it's done, your BMP file downloads to your device.
QUALITY & FIDELITY
Quality and fidelity
- Lossless to lossless: conversion is mathematically reversible in principle.
- Transparency is lost: alpha is flattened against a solid background.
- Metadata is dropped: the target format does not carry it natively.
Transparency ICO
✓ BMP
✗
Color depth 8-bit RGBA 24-bit RGB
Metadata preserved ✗
FORMAT SPECS
Format specifications
| ICO | BMP | |
|---|---|---|
| Extensions | .ico | .bmp .dib |
| MIME types | image/vnd.microsoft.icon image/x-icon | image/bmp |
| Introduced | 1985 | 1990 |
| Maintainer | Microsoft | Microsoft / IBM |
| Magic # | 00 00 01 00 | 42 4D |
| Spec | View spec ↗ | View spec ↗ |
COMPATIBILITY
Where these formats work
| Platform | Windows | macOS | iOS | Android | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|---|---|---|---|
| ICO | Native | App | App | App | Native | Native | Native | Native |
| BMP | Native | Native | Native | App | Native | Native | Native | Native |
ICO
- Windows
- Native
- macOS
- App
- iOS
- App
- Android
- App
- Chrome
- Native
- Firefox
- Native
- Safari
- Native
- Edge
- Native
BMP
- Windows
- Native
- macOS
- Native
- iOS
- Native
- Android
- App
- Chrome
- Native
- Firefox
- Native
- Safari
- Native
- Edge
- Native
Why LocalConvert
How LocalConvert compares
| Category | LocalConvert | Cloud converters |
|---|---|---|
| PRIVACY | Files never leave your device. The whole pipeline runs in your browser via WebAssembly. | Files travel to a remote server, sit in queue storage, and may be retained for analytics or moderation. |
| COST | Free, no signup, no daily quotas. | Often free for small files; paid tiers for batch / large / commercial use. |
| LIMITS | Limited only by your device's memory and CPU. Multi-GB files OK on desktop. | Typical 100 MB to 1 GB per-file caps, plus rate limits. |
— The formats
From · ICO
Windows Icon
A container that can hold multiple sizes and bit depths of an icon image. Used for application icons and browser favicons.
Typical uses
Favicons, Windows app icons.
To · BMP
Bitmap Image File
A simple, uncompressed raster format from Windows. Large file sizes but easy to read and write.
Typical uses
Legacy Windows software, ICO source assets, simple bitmap exchange.
— FAQ
Frequently asked.
Is ICO to BMP conversion free?
Yes. LocalConvert is completely free, with no signup and no per-file or per-day limits.
Do my files get uploaded anywhere?
No. ICO to BMP conversion happens entirely inside your browser using WebAssembly — your file never leaves your device.
What's the maximum file size?
There's no fixed cap — the practical limit is your device's available memory. Very large files may take longer or fail on low-RAM devices.
Does it work offline?
Yes — once the page has loaded, ICO to BMP conversion works without an internet connection. Re-open the page once to cache it.
Will conversion preserve quality?
LocalConvert uses the industry-standard tools (FFmpeg, ImageMagick, Pandoc) — quality matches what professionals use on the command line. Lossy formats will still lose some quality on each re-encode.
— Related
Or convert these.
Browse all conversionsREFERENCES
Format references
Last verified:
100% local conversion.
ICO to BMP is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.