Free BMP to WebP converter online
Need a WebP instead of a BMP? This free converter turns BMP files into WebP images right in your browser. Add as many files as you like, adjust the settings and download the results individually or together as a ZIP.
BMP is an uncompressed bitmap format from early Windows. Because it stores every pixel raw, BMP files are enormous (a 12 megapixel photo is about 36 MB) but they are trivially simple, so old software, microcontrollers, label printers and some games still require them.
WebP is a modern format created by Google for the web. It is typically 25 to 35 percent smaller than an equivalent JPG and supports transparency and animation, which is why so many websites now serve it. The downside is compatibility: older versions of Photoshop, Windows Photo Viewer, many printers and lots of upload forms still cannot open WebP files.
About BMP and WebP files
New to these formats? These pages explain what each one is for and how to open it on Windows, Mac, iPhone and Android.
Why convert BMP to WebP?
- WebP files are much smaller than JPG and PNG at the same visual quality, which makes web pages load faster and improves Core Web Vitals and SEO.
How to convert BMP to WebP
- Click the upload box or drag and drop your BMP files (you can select several at once).
- Conversion to WebP starts automatically. Change the quality or background colour if you like.
- Download each WebP file or click 'Download all' for a ZIP.
Features
- Batch conversionConvert hundreds of BMP files at once.
- No uploadFiles never leave your device, so it is fast and private.
- Strips metadataThe WebP files contain no EXIF or GPS data.
- Any deviceWorks on iPhone, Android, Windows, Mac and Chromebook.
BMP vs WebP: what's the difference?
| Feature | BMP | WebP |
|---|---|---|
| Full name | Bitmap Image File | WebP (Google) |
| Released | 1990 | 2010 |
| Compression | None (uncompressed) | Lossy and lossless |
| Transparency | Rarely supported | Yes (full alpha) |
| Animation | No | Yes |
| Typical file size | Huge | Very small |
| Best for | legacy Windows software, embedded devices and some printers | websites, because it is 25-35% smaller than JPG at the same quality |
| Compatibility | Windows apps and most editors; inefficient for the web | All modern browsers; some older desktop apps and upload forms still reject it |
| File extensions | .bmp, .dib | .webp |
| MIME type | image/bmp | image/webp |
Frequently asked questions
How do I convert BMP to WebP?
Open this page, add your BMP files, and FileStripe converts them to WebP in your browser. Then download the files one by one or as a ZIP. It takes a few seconds and you don't need to install anything.
Will converting BMP to WebP reduce quality?
WebP is a lossy format, so there is a small, usually invisible, loss. Use the quality slider: 90 or above is visually identical for almost all images, but note that BMP graphics with sharp text may look slightly softer.
Can I convert multiple BMP files to WebP at once?
Yes. Select or drop as many BMP files as you like; there is no limit on the number or size of files.
Is the BMP to WebP free?
Yes. The BMP to WebP is completely free with no sign-up, no watermarks, no daily limits and no premium tier.
Are my files uploaded to a server?
No. FileStripe processes your files locally in your web browser using JavaScript. Nothing is uploaded, so the BMP to WebP is safe for private photos and confidential documents and even works offline once the page has loaded.
Does it work on iPhone and Android?
Yes. The BMP to WebP works in Safari, Chrome, Firefox, Edge and Samsung Internet on phones, tablets and computers. On a phone you can pick files from your photo library or files app and share the result straight to another app.
Last updated · Processing happens locally in your browser.