Convert BMP to WebP to Speed Up Your Site
Convert BMP images to WebP — right in your browser. Turn a huge, uncompressed bitmap into a tiny, modern file with excellent quality. Your images never leave your device. No watermarks, no sign-ups.
Your images never leave your device
Nothing to delete later
Secure connection
Works in every modern browser
How it works
- 1
Add your BMPs
Drop your BMP files onto the page or click to browse and select them.
- 2
Convert
Press Convert — each BMP is re-encoded as a WebP in your browser.
- 3
Download
Save the WebP files instantly, individually or all at once.
Why use this tool
Smallest modern file
WebP is more efficient than JPG or PNG, so a bulky BMP becomes a tiny file.
Great quality
WebP keeps the picture looking excellent at a fraction of the BMP’s size.
Supports transparency
If the BMP has an alpha channel, WebP keeps the transparency intact.
Private by design
The BMP is decoded locally in your browser — your images are never uploaded.
Free & unlimited
No account, no trial, no per-file charges — convert as many BMPs as you like.
Works on any device
Phone, tablet, or computer — it runs in the browser you already have.
What does converting BMP to WebP do?
BMP (Bitmap) is an old, uncompressed image format from the Windows world: it stores every pixel raw, so files are enormous. WebP is a modern format built for the web that compresses far more efficiently than older formats, producing a very small file at excellent quality, with support for transparency. Converting BMP to WebP takes that huge bitmap and turns it into a compact, modern file that loads fast and is easy to share. Because this tool runs entirely in your browser, the image is decoded on your own device and is never uploaded.
When should you convert BMP to WebP?
Convert whenever you want the smallest possible modern file from a BMP and the destination supports WebP — websites, modern apps, and messaging all display WebP natively. It is the most efficient choice, usually smaller than both JPG and PNG at comparable quality. If you need the widest possible compatibility with older software instead, convert to JPG for photos or PNG for graphics; but for a small, high-quality file on the modern web, WebP is the best target.
How WebP compares to JPG and PNG here
For a photographic BMP, WebP usually produces a smaller file than JPG at the same visible quality, and it can be lossy or lossless. For a graphic or screenshot, WebP can match PNG’s crisp, lossless look while being smaller, and it keeps transparency like PNG does. In short, WebP tends to give you the best of both worlds — the small size of JPG and the transparency and sharpness of PNG — as long as everywhere you use the file supports it, which modern browsers and apps do.
How to get the best results
For photos, a high WebP quality keeps the picture looking essentially identical while the file stays tiny. If you need it even lighter for the web, lower the quality a little — WebP degrades gracefully. For graphics, screenshots, or anything with sharp edges and text, use a high quality (or lossless if the tool offers it) so the edges stay crisp. If the BMP has transparency, WebP preserves it, so you do not need PNG just to keep the alpha channel.
Limitations to be aware of
The main thing to check is support at the destination. Every modern browser and most apps handle WebP, but a few older programs or very old devices may not open it — in those cases, JPG or PNG is safer. Converting also cannot restore detail a low-quality BMP never had; it preserves what is there while making the file smaller. And at very low quality settings, a lossy WebP can show artefacts just like a JPG, so keep quality high for anything important.
Using it on mobile and desktop
On a phone, convert a BMP into a small WebP that a modern app or website will accept, with no app to install — everything runs locally. On a computer, drop a batch of BMPs from old software or a scanner and convert them all to WebP at once, turning a folder of huge bitmaps into tiny, web-ready files. Because there is no app to install, the same link works on every device, and nothing you add is ever uploaded.
Why convert here instead of another site?
Most online BMP-to-WebP converters upload your files to a server, convert them there, and promise to delete them later. This tool never uploads anything — the BMP is decoded inside your browser, so images that may be personal or work-related stay on your device from start to finish. There are no watermarks, no sign-up wall, and no cap on how many files you convert. It is faster too, with no upload-and-wait step, and it works offline once the page has loaded.
How it compares
| Feature | This tool | Typical online converters |
|---|---|---|
| Files uploaded to a server | Never — decoded in your browser | Usually uploaded |
| Smaller than JPG/PNG | Usually yes | Yes |
| Keeps transparency | Yes | Yes |
| Watermark on output | No | Sometimes |
| Account or sign-up | Not required | Often required |
| Price | Free | Free / paid tiers |
Features
BMP to .webp
Turns a bulky bitmap into a modern WebP that is small and looks great.
Quality you control
Choose how hard to compress — smaller file or higher fidelity.
Keeps transparency
Alpha in the BMP is preserved, unlike a JPG conversion.
Batch convert
Add several BMPs and turn them all into WebP in one go.
Keeps dimensions
The picture stays the same width and height — only the format changes.
No installation
Nothing to download or install — it works on the web page.
Arabic & RTL friendly
Full interface in eight languages, including right-to-left Arabic.
Secure by default
Served over HTTPS, with no file tracking and no third-party upload.
Who uses it
Web developers
Turn bulky BMP assets into tiny WebP for fast-loading pages.
Windows users
Shrink huge BMP exports into small, modern WebP files.
Content creators
Get the smallest high-quality version of a BMP for the web.
Everyday users
Make an old BMP small and modern as WebP — privately, on their own device.
Frequently Asked Questions
WebP is a modern format that delivers excellent quality at a much smaller size than JPG or PNG, so pages load faster and use less bandwidth. The whole conversion happens locally in your browser, so it is instant and private.
Yes. Adjust the quality slider from 1 to 100; a value around 80 gives a great balance of small size and high quality for most images.
No. The conversion runs entirely in your browser using the Canvas API — your images are never uploaded, stored, or shared.
Yes. Add as many BMP images as you like and convert them in one pass; download each result individually or all together as a ZIP.