BMP to WebP

Convert BMP images to WebP in your browser. Nothing is uploaded.

Runs in your browser. Nothing is uploaded.

Your files are processed by your own browser and never sent to a server. Open your browser's network tab and convert one — there is no upload to see.

How to convert BMP to WebP

  1. Drop your BMP files onto the box above, or paste them with Ctrl+V.
  2. Pick a quality. Around 90% is indistinguishable from the original for most images.
  3. Your browser decodes and re-encodes each file on your own machine.
  4. Download them one at a time, or all at once.

About BMP

An uncompressed Windows format. Enormous files, no reason to keep them that way.

About WebP

Smallest of the three at the same visible quality, and keeps transparency.

Will the quality change?

WebP is lossy, so the image is decoded and re-encoded and a little detail is dropped. At high quality this is invisible. Convert once from your original rather than repeatedly, because each pass compounds.

Other conversions

Last updated August 2026

Privacy

Your files are never uploaded

Every conversion happens inside your browser, on your own device. No server receives your file, so there is nothing for anyone to store, sell, lose in a breach, or be compelled to hand over. You can check: open your browser’s Network tab and convert something — there is no upload. The site also keeps working with your connection switched off.

We collect nothing about you

There are no accounts, no sign-up and no contact form. We do not ask for your name or your email address, and there is no database here holding anything about you.

What is stored on your device

Only preferences, such as the output format you last chose. That stays in your browser, is readable only by this site, and is removed if you clear site data.

Hosting

The site is served by Cloudflare Pages, which processes the technical information every browser sends with a request — an IP address and user agent — to serve pages and block abuse. That applies to page requests only. Your files are never part of a request.

Analytics and advertising

There are currently none, and no cookies are set for either. We intend to add advertising to cover costs. This page will be updated to name the provider before that happens. Advertising can never see your files, because your files never leave your device.

Terms

Free to use

For personal and commercial work alike, with no account and no watermark. Please do not try to disrupt the site or interfere with how it works for other people.

Your files stay yours

They never reach us, so we claim no rights over them and hold no copy of them.

No warranty

The tools are provided as they are. Conversion can fail on unusual or damaged files, and converting between formats can lose quality or detail — compressing a PDF, for instance, turns its text into part of an image. Keep your originals, and do not rely on this as the only copy of anything that matters. We are not liable for any loss arising from using the site.

Changes

These terms may change. The date above shows when they last did.

Also available as a page.