AVIF to TIFF Converter

AVIF is efficient for the web, but print shops, archives, scanners' software and many document systems only take TIFF. This converter decodes each AVIF in your browser and writes a lossless TIFF with LZW, Deflate or no compression, a print resolution and transparency kept as an alpha channel — or several pictures combined into one multi-page TIFF.

How to use this tool

1. Drop one or more .avif files.
2. Pick the compression: LZW is the safe default.
3. Keep the default 72 DPI or set the print resolution; keep or fill transparent areas.
4. Optionally combine everything into a multi-page TIFF, then download.

Formula

Print size (inches) = pixels ÷ DPI. TIFF = 8-byte header + per page an image directory (size, 8-bit RGB or RGBA, compression, strip offsets and sizes, resolution) + ~64 KB strips.

The browser decodes AVIF (including 10-bit and HDR files) to 8-bit sRGB, which is what the TIFF stores. LZW and Deflate use predictor 2 (differences between neighbouring pixels) and are lossless. AVIF has no standard print resolution, so 72 DPI is written unless you choose one.

Example

A 1600 × 1200 px AVIF saved at 300 DPI prints at 1600 ÷ 300 = 5.33 × 4 inches (13.5 × 10.2 cm). Uncompressed its pixels take 1600 × 1200 × 3 = 5,760,000 bytes; LZW and Deflate make the file smaller without changing a pixel.