BMP to AVIF Converter
Convert BMP to AVIF entirely in your browser — private, fast, and free, with no file size limit. Drop a BMP file below — conversion happens locally on your device, so the file never leaves your computer.
Drop files, or click to browse
BMP files only — any size, any number of files
Frequently asked questions
Is this BMP to AVIF converter really free?+
Yes. There's no file limit, no watermark, and no account required. Because the conversion runs in your browser instead of on a server, there's no processing queue to pay for.
Is my file uploaded anywhere?+
No. Orbfile decodes and re-encodes the image locally using ImageMagick compiled to WebAssembly, running entirely inside your browser tab. The bytes never leave your device.
Will converting to AVIF lose quality?+
There's a quality slider so you can balance file size against visual quality. At high quality settings the difference is usually invisible.
Can I convert more than one file at once?+
Yes — drop as many files as you like and download them individually or as a single ZIP.
Is there a maximum file size?+
There's no fixed upload limit — Orbfile isn't uploading anything. The practical ceiling is your device's own memory, which comfortably handles even large, high-resolution photos.
How do I convert BMP to AVIF?+
Drop your BMP file into the box above — it's automatically converted to AVIF and a download link appears in seconds. No settings are required, though you can adjust quality if the tool offers a slider.
About BMP and AVIF
What is BMP?
BMP is an old Windows bitmap format that stores pixel data with little or no compression — simple, but large.
Full BMP format guide →What is AVIF?
AVIF is a newer, next-generation image format built on the AV1 video codec, delivering some of the smallest file sizes available today.
Full AVIF format guide →People usually reach for this conversion because AVIF offers often 50% smaller than PNG or JPG at visually similar quality, sidestepping a real BMP weak spot: huge file sizes compared to almost any modern format. It's especially useful for performance-focused websites.
How it works
- 1
Drop your file in
Drag your image onto the box above, or click it to browse — there's no account to create and no upload to wait on.
- 2
Pick your settings
The output format is already set for this page — just adjust any extra options shown, if there are any.
- 3
Download the result
Your browser processes everything locally and hands you a download link the moment it's done — nothing was ever sent to a server.
Is it private?
Everything happens locally, inside this browser tab. Your image is read from disk, processed with WebAssembly running on your own device, and handed back to you as a download — it's never transmitted anywhere, so there's nothing to intercept and nothing stored on a server.
Common use cases
- Performance-focused websites
- Archiving large photo libraries in less space
- Preparing images for a website or online store
- Attaching a photo to an email with a size limit
Supported formats
This is one of many pairings the image toolkit handles. In total it covers:
Related conversions
Format details
About BMP files+
BMP is an old Windows bitmap format that stores pixel data with little or no compression — simple, but large.
BMP dates back to the earliest versions of Microsoft Windows, where it was used as the native format for storing raw pixel grids with minimal processing overhead — appropriate for the modest CPUs of the era, but wasteful by modern standards. Because it stores pixels close to as-is, a BMP file opens instantly and never introduces compression artifacts, but it can be five to ten times larger than a JPEG of the same image. Today it mostly survives in legacy Windows software and a few specialized pipelines that specifically want uncompressed pixel data.
How to open a BMP file
Opens readily in Windows Photos, macOS Preview, Any web browser. For real editing, use Photoshop, GIMP, MS Paint.
Good for
- dead-simple, well-documented structure
- no compression artifacts
Watch out for
- huge file sizes compared to almost any modern format
About AVIF files+
AVIF is a newer, next-generation image format built on the AV1 video codec, delivering some of the smallest file sizes available today.
AVIF takes the intra-frame compression from the royalty-free AV1 video codec and repurposes it for still images, and the result is often noticeably smaller than an equivalent WebP or JPEG at the same visual quality. It also supports wide color gamuts, HDR, and transparency, making it one of the more technically complete image formats available. The tradeoff is encoding speed and, until recently, patchier software support — both are improving quickly as browsers and operating systems catch up.
How to open a AVIF file
Opens readily in Chrome, Firefox, Edge, Safari (recent versions). For real editing, use GIMP (recent versions), Affinity Photo.
Some older photo viewers and editors need an add-on or a recent update to open AVIF directly.
Good for
- often 50% smaller than PNG or JPG at visually similar quality
- supports transparency and HDR
Watch out for
- slower to encode
- not yet supported everywhere older software runs
Need a different format? Try the full Image Converter, or explore all image tools.