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Convert BMP to AVIF

Source · BMP
Target · AVIF

Drop a BMP file here

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Advanced options
55
  • Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

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What happens when you convert BMP to AVIF?

Encoding mode

AVIF can use lossy or lossless AV1 coding. Chroma subsampling, RGB↔YUV conversion and reduced bit depth can change source values even when the AV1 coding stage is lossless. Quality defaults to 55; adjust it in Advanced options. File size depends on the image and encoder.

Sample precision & colour

Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

BMP

Source

BMP

Windows Bitmap

Compression: Depends on variantTransparency: YesMetadata: DIB header, ICC (V5)

Windows raster storage with several DIB header versions. Simple uncompressed pixels are common, but alpha and compression vary.

Explore BMP format →
AVIF

Target

AVIF

AV1 Image File Format

Compression: Lossy & losslessTransparency: YesMetadata: Exif, XMP, ICC, CICP

AV1-compressed pictures in an image container, with optional alpha, sequences and high-dynamic-range colour.

Explore AVIF format →

Is BMP → AVIF right for you?

Good choice when

  • AVIF fits your delivery use: Photo delivery & HDR images.
  • You need a transparency-capable destination and will check its supported variant.
  • Your receiving application supports the required AVIF variant.
  • You can validate the destination’s sample precision and colour interpretation.

Probably not when

  • You assume format-level alpha support guarantees matching transparent edges.
  • You need a guaranteed output file size or archival pixel equality. Encoder settings do not guarantee either.
  • You require identical samples without a defined colour and precision policy.

BMP to AVIF conversion details

Transparency representation
The implemented target supports alpha. Display-pixel processing can round translucent samples; archival sample equality is not promised.
Encoding mode
AVIF can use lossy or lossless AV1 coding. Chroma subsampling, RGB↔YUV conversion and reduced bit depth can change source values even when the AV1 coding stage is lossless. Quality defaults to 55; adjust it in Advanced options. File size depends on the image and encoder.
Sample precision & colour
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Metadata & colour
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Compression
BMP: Depends on variant → AVIF: Lossy & lossless BMP: BMP may be uncompressed or use a header-selected encoding. Alpha is header-dependent; 32 bits alone do not establish transparency support in the receiving application. AVIF: AVIF can use lossy or lossless AV1 coding. Chroma subsampling, RGB↔YUV conversion and reduced bit depth can change source values even when the AV1 coding stage is lossless.
Transparency
Transparency is replaced with white by default. Change the background in Advanced options.
Animation
Still image output. Animated files use only the first frame; animation is not preserved.
Colour depth
BMP: 1 / 4 / 8 / 16 / 24 / 32 bpp → AVIF: 8 / 10 / 12 bits
HDR
AVIF: Optional; colour properties
Dimensions
Rendered image dimensions are retained within the converter limits; this tool does not offer resizing. Orientation handling depends on the source decoder.
Metadata
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

Common questions

Which compression mode will AVIF use?

AVIF can use lossy or lossless AV1 coding. Chroma subsampling, RGB↔YUV conversion and reduced bit depth can change source values even when the AV1 coding stage is lossless. Quality defaults to 55; adjust it in Advanced options. File size depends on the image and encoder.

Are bit depth and colour values guaranteed to match?

Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

Will metadata and colour profiles be retained?

Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

Explore related BMP and AVIF conversions.

Other targets for BMP

BMP→PNG
BMP → PNG
BMP→TIFF
BMP → TIFF
BMP→JPEG
BMP → JPEG

Other sources for AVIF

JPEG→AVIF
JPEG → AVIF
WebP→AVIF
WebP → AVIF
HEIC→AVIF
HEIC → AVIF