AVIF to BMP Converter

About AVIF to BMP

Opens an AVIF image and saves it as a genuine 24-bit bitmap, aimed at older Windows programs that recognize only bitmaps. A BMP holds raw uncompressed pixels, so it is far larger than an AVIF.

How to use it

1. Drop an AVIF file onto the drop zone, or click to browse for a .avif file.
2. Look at the Source preview to confirm your browser decoded the image.
3. Press Convert to BMP. There are no options for this target.
4. Study the Output panel, then press Download BMP.
5. Press Reset to work on a different file.

The raw size a genuine BMP would have

An AVIF of 800 x 600 pixels, around 30 KB.

A real 24-bit BMP of it would be 2,400 x 600 + 54 = 1,440,054 bytes, about 1.4 MB. This tool writes a file of exactly that size, since the pixels are stored raw.

When to use it

• Giving an AVIF picture to an old utility that lists only bitmap files in its open dialog.
• Testing how a Windows program deals with a bitmap-named file.
• Handling a workflow that renames everything to .bmp before further processing.

Questions about AVIF to BMP

Does this write a genuine BMP header?

Yes. Canvas encoders in current Chrome produce only PNG, JPEG and WebP, so the tool writes the bitmap itself. It begins with BM, carries a 40-byte info header and stores bottom-up 24-bit rows padded to four bytes.

Why choose BMP for an AVIF at all?

Rarely by preference. It is for legacy compatibility where software only lists bitmaps. For everything else, PNG is smaller, lossless and readable almost everywhere.

Will an AVIF with transparency keep it?

No. A 24-bit bitmap has no alpha channel, so transparent pixels are blended onto white when the file is written. Convert to PNG or ICO if you need to keep transparency.

What should I do if the AVIF does not preview?

That means your browser cannot decode AVIF. Update to Chrome 85, Firefox 93 or Safari 16.4 or newer, then try again.

Related tools

• BMP to AVIFConvert BMP images to AVIF format in your browser — no upload required.
• PNG to AVIFConvert PNG images to AVIF format in your browser — no upload required.
• JPG to AVIFConvert JPG images to AVIF format in your browser — no upload required.
• ICO to AVIFConvert ICO images to AVIF format in your browser — no upload required.
• GIF to AVIFConvert GIF images to AVIF format in your browser — no upload required.
• WEBP to AVIFConvert WEBP images to AVIF format in your browser — no upload required.