BMP → AVIF Converter

Drag & Drop your .bmp file here, or pick a file below. Nothing is uploaded.

AVIF quality

Higher = larger file, better quality.

Encoder effort (speed)

0 = fastest, 10 = slowest/best compression (WASM only).

Chroma subsampling

Bit depth

Load a BMP or use an example to preview.

Input: -

Output: -

BMP → AVIF - Quick Cheat Sheet

Local only: Everything runs in your browser; files aren't uploaded.
Quality: 70-90 is a good range. Higher = bigger file.
Effort: Higher effort compresses better but is slower,
Chroma: 4:2:0 is smallest; 4:4:4 preserves color best.
Bit depth: 8-bit is widely compatible; 10-bit may be larger and requires encoder support.
Transparency: BMP has no alpha; AVIF will be opaque unless you add transparency in the pipeline.