Convert your .bmp files to .avif format online for free. No software to install. Fast, secure, and easy.
Free — 3 conversions per day
Drag and drop your .bmp file or click to browse.
Select AVIF as your output format.
Click Convert and download your .avif file.
BMP stores raw pixel data with zero compression, resulting in very large files. Converting to AVIF applies lossy compression to make the file dramatically smaller with minimal visual quality loss.
BMP (Bitmap Image File, introduced in 1986) uses None (RLE optional but rarely used) compression. AVIF (AV1 Image File Format, introduced in 2019) uses AV1 intra-frame (lossy and lossless) compression. AVIF adds transparency support that BMP lacks, which is valuable for logos, icons, and overlay graphics. AVIF supports animation, unlike BMP. However, converting a static image will not create animation. BMP browser support: All modern browsers. AVIF browser support: All modern browsers (Chrome 85+, Firefox 93+, Safari 16.4+).
The quality impact depends on the specific settings used during conversion. AVIF preserves full quality with lossless compression.
Typical BMP file size: A 12MP photo: ~36 MB (24-bit uncompressed). Typical AVIF file size: A 12MP photo at medium quality: ~1-2 MB. Expect a dramatic file size reduction — often 5-20x smaller — when converting from uncompressed BMP to AVIF.
Always keep your original BMP file as a master copy. Convert to AVIF only for distribution. If you need to make changes later, work from the lossless original to avoid compounding compression artifacts.
Convert BMP to AVIF completely free with no limits. No hidden fees, no watermarks.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Image conversions happen in your browser using the Canvas API. Your files never leave your device — zero server upload.
Convert files from any device — desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .avif file maintains the best possible quality. No unnecessary compression or quality loss.
Yes, BMP to AVIF conversion is completely free with no limits. Image conversions happen in your browser.
Image conversions are instant — they happen directly in your browser without uploading to any server.
Absolutely. BMP to AVIF conversion happens entirely in your browser. Your files never leave your device.
Currently, SquishConvert converts one file at a time. Batch conversion is coming soon — stay tuned!
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.