How to convert BMP to WebP
- Drop your BMP files or tap to choose them.
- Select WebP as the output and set quality if needed.
- Click Convert — processing happens on your device.
- Download each file or all of them as a ZIP.
Why convert BMP to WebP?
BMP is excellent for legacy Windows software, embedded devices and raw pixel workflows, but it has some limitations:
- Huge file sizes
- Poor web support
- No transparency in common variants
Converting to WebP gives you:
- Much smaller than JPG and PNG
- Transparency and animation
- Supported by all modern browsers
- Great for website speed and SEO
BMP vs WebP: side-by-side comparison
| Feature | BMP | WebP |
|---|---|---|
| Full name | Bitmap Image File | Web Picture format |
| File extension | .bmp | .webp |
| Type | Image | Image |
| Compression | Uncompressed | Lossy & lossless |
| Transparency | No | Yes |
| Animation / multi-frame | No | Yes |
| Introduced | 1985 | 2010 |
| Developed by | Microsoft | |
| MIME type | image/bmp | image/webp |
| Best for | legacy Windows software, embedded devices and raw pixel workflows | websites, blogs, e-commerce product images |
What are BMP and WebP files?
BMP (.bmp)
BMP is an old uncompressed bitmap format from Microsoft Windows. It stores raw pixel data, so quality is perfect but files are very large.
WebP (.webp)
WebP is a modern image format by Google that makes files 25–35% smaller than JPG or PNG at similar quality. It supports transparency and animation, and is used heavily by websites — which is why images saved from the web often end up as .webp.
Tips for the best WebP results
- A quality of 85–92% gives excellent results at a fraction of the size. Use the Image KB Converter if a form requires a specific file size.
- Bookmark this page or install the app to convert BMP files offline next time.
Private by design: how this converter works
Unlike typical online converters that upload your file to a remote server, this BMP to WebP converter processes everything on your own device using the HTML5 Canvas API and native image decoders built into your browser. Your file is read into browser memory, converted, and offered back as a download — it is never sent to us.
- No upload wait — conversion starts instantly, even on slow mobile data.
- Private — safe for NID copies, certificates, bank statements and personal photos.
- No limits — no daily quota, no queue and no watermark.
- Offline-ready — once loaded, many tools keep working without internet.
Frequently asked questions
Is this BMP to WebP converter free?
Yes — free, unlimited and without watermarks or sign-up.
Are my BMP files uploaded to a server?
No. Conversion happens inside your browser on your own device, so your files stay private.
Will I lose quality converting BMP to WebP?
WebP uses lossy compression, so a tiny amount of detail is discarded. At the default high quality setting the difference is practically invisible. Increase the quality slider for maximum fidelity.
Can I convert several files at once?
Yes. Drop multiple files and download them individually or together as a ZIP.
Does it work on iPhone and Android?
Yes. It works in Chrome, Safari, Edge and Firefox on phones, tablets and computers. You can also install the site as an app.
What is the difference between BMP and WebP?
BMP (Bitmap Image File) is uncompressed and best for legacy Windows software, embedded devices and raw pixel workflows, while WebP (Web Picture format) is lossy & lossless and best for websites, blogs, e-commerce product images.