Turn BMP images into AVIF. It is converted in your browser, so the file never leaves your device.
Drop BMP files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop BMP files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the AVIF, or download everything as one ZIP if you converted several files.
The BMP to AVIF converter is part of this page and runs inside your browser. Your images are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
BMP files are uncompressed, so they are many times larger than they need to be. AVIF gives the smallest files of any widely supported image format. BMP is at home in legacy Windows software and embedded devices; AVIF is the usual choice for the smallest images for websites.
The defaults suit most files. Under Options you can set the quality, aim for a target file size and resize the result.
The AVIF encoder is a WebAssembly module that downloads the first time you convert to AVIF and is cached afterwards.
BMP is the plain Windows bitmap: pixels written out with little or no compression. The files are enormous compared with PNG or JPG, but the format is so simple that old software, printers and microcontroller displays still ask for it.
Opens in Windows, macOS and most image apps; too large for the web
BMP converterAVIF stores a still image using the AV1 video codec. It usually beats both JPG and WebP on file size and supports transparency, HDR and wide colour. Current browsers display it, but many image editors, viewers and upload forms still do not.
Opens in Chrome, Firefox, Edge and Safari 16 or later; few desktop apps
AVIF converter| BMPBitmap image | AVIFAVIF image | |
|---|---|---|
| Stands for | Bitmap | AV1 Image File Format |
| Type | Raster image | Raster image |
| Compression | Usually none | Lossy or lossless (AV1) |
| Transparency | Rarely (32-bit variants only) | Yes |
| Animation | No | Yes |
| Introduced | The late 1980s, by Microsoft | 2019, by the Alliance for Open Media |
| Opens in | Windows, macOS and most image apps; too large for the web | Chrome, Firefox, Edge and Safari 16 or later; few desktop apps |
| Best for | Legacy Windows software and embedded devices | The smallest images for websites |
| File extension | .bmp, .dib | .avif |
No. The BMP to AVIF conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
A little: ToAny writes AVIF in its lossy mode, so a small amount of detail is traded for a much smaller file. At the default setting the difference is hard to notice. You can raise the quality under Options; there is no lossless setting.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the BMP file, press Convert and save the AVIF. There is nothing to install.
Pictures of up to 120 megapixels are accepted (for example 12,000 by 10,000 pixels); a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.