BMP to ICO converter: free, fast and secure
This free BMP to ICO converter turns your BMP images into ICO files in seconds, right in your browser. BMP files are uncompressed and very heavy. ICO gives you the same picture at a fraction of the size. ICO is the format browsers use for favicons and Windows uses for app and folder icons.
Unlike most converters, ConvertKaro never uploads your images. The conversion happens on your own device, so it is quicker, there are no file limits, and your photos stay private.
How to convert BMP to ICO in 3 steps
- Add your BMP files. Tap “Select files” or drag and drop one or more .bmp images into the box above. You can also paste a screenshot with Ctrl+V.
- Adjust the options. Nothing to set: every common icon size is included automatically.
- Download your ICO. Conversion starts instantly. Download each ICO file, or all of them at once as a ZIP.
Why use ConvertKaro BMP to ICO? Free, fast and secure
There are many BMP to ICO websites, but most of them upload your files, add watermarks or ask you to pay. Here is why this one is better.
100% Free
BMP to ICO on ConvertKaro costs nothing. There is no trial, no premium plan and no hidden limit, so you can use it as often as you like.
Fast results
Because nothing travels to a server, results appear almost instantly. Large files are limited only by the speed of your own phone or computer.
Secure and private
Nothing is uploaded. Sensitive files like Aadhaar, PAN, salary slips or contracts stay on your own phone or laptop the whole time.
No signup, no watermark
No account, no email and no watermark on your result. Open the page and start.
Works on every device
Designed for mobile first, so it works just as well on your phone as on a desktop computer.
Quality you control
The ICO output keeps the full resolution of your BMP, with high-quality resizing and correct colours.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
BMP vs ICO: what is the difference?
Both formats store images, but they are built for different jobs. Here is a quick comparison.
| BMP | ICO | |
|---|---|---|
| Full name | Bitmap Image File | Windows Icon |
| Type | Raster, uncompressed | Raster container |
| Compression | None | PNG inside |
| Transparency | No | Yes |
| Animation | No | No |
| File size | Very large | Small |
| Support | Windows and most editors | Browsers (favicons), Windows |
| Best for | Legacy Windows software, some printers and machines | Website favicons, Windows app and folder icons |
What is BMP?
BMP is the classic Windows bitmap format. It stores every pixel without compression, so the quality is perfect but the files are huge: a normal phone photo can become 10–30 MB. Today BMP is mostly used by older Windows programs, embroidery and printing machines, and some industrial software that expects raw pixel data.
What is ICO?
ICO is the icon format used for website favicons and Windows icons. One .ico file can contain several sizes of the same picture (16, 32, 48 up to 256 pixels) so the system can pick the right one for tabs, bookmarks, the taskbar or the desktop.
When should you convert BMP to ICO?
- Website favicons for the browser tab
- Windows app and shortcut icons
- Folder icons
- Bookmarks and pinned sites
Tips for the best ICO results
- Use a square logo of at least 256×256 pixels with a transparent background. For a full favicon package with Apple and Android icons, use the Favicon Generator.
- You can convert many BMP files at once. They are processed one after another and can be downloaded together as a ZIP.
- Keep your original BMP files until you have checked the converted ICO images.
How BMP to ICO keeps your photos and images private
When you add a file to BMP to ICO, it is opened with your browser’s own engine, processed in memory and offered back to you as a download. ConvertKaro never receives a copy. This is why the tool is fast even on 4G, why there is no daily limit, and why it is safe for confidential photos and images like ID proofs, bank documents, contracts and family photos.
Using BMP to ICO on your phone
On a phone, open this page in Chrome or Safari, tap the main button and pick files from your gallery, Files app or Google Drive. Results download straight to your phone, usually into the Downloads folder or Files app. You can also add this page to your home screen for one-tap access next time.
Who uses BMP to ICO?
Here are some of the people who find this tool most useful:
- Students uploading photos and signatures to exam and admission forms
- Online sellers preparing product photos for Instagram, Meesho, Amazon and Shopify
- Office staff handling ID cards, scans and screenshots
- Bloggers and web designers who need fast-loading images
- Anyone sharing pictures on WhatsApp, email or social media
Supported input: JPG, JPEG, PNG, WEBP, HEIC/HEIF (iPhone), AVIF, GIF, BMP, TIFF and SVG.
Frequently asked questions
Will converting BMP to ICO reduce quality?
Each icon size is resized with high-quality smoothing. Start from a large, square image for the sharpest favicon.
Does ICO keep transparency from BMP?
BMP images do not have transparent areas, so there is nothing to lose. ICO can hold transparency if you edit the image later.
Can I convert multiple BMP files to ICO at once?
Yes. Select or drop as many BMP images as you like. Each one is converted separately, and you can download them all together as a ZIP file.
Which sizes are inside the ICO file?
The icon contains 16, 32, 48, 64, 128 and 256 pixel versions, which covers browser tabs, bookmarks, the Windows taskbar and desktop shortcuts.
Is BMP to ICO really free?
Yes, completely free. You can use it as many times as you want, and every option on the page is included at no cost.
Is it safe to use BMP to ICO online?
Yes. Your files are processed inside your own browser and are never uploaded to our servers, so nobody else can see them.
Does BMP to ICO work on mobile?
Yes, the tool is built mobile-first. Open this page on your phone, add your files and download the result directly.
Is there a file size limit in BMP to ICO?
There is no fixed limit set by us because files are not uploaded. Very large files depend on your device’s memory; most phones handle files of 100 MB or more without problems.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does BMP to ICO work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.