Convert TIFF to PNG — Lossless, With Transparency

TIFF to PNG or TIFF to JPG

What changes in conversion

16-bit and CMYK TIFFs are converted to 8-bit RGB, because that is what browsers and screens use. Layers are flattened. Everything else, including the exact pixel values of an 8-bit RGB image and its transparency, carries over.

Resolution in pixels does not change. The DPI tag that tells a printer how large to print the image is a separate setting; a 2550 × 3300 pixel scan is still 8.5 × 11 inches at 300 DPI after conversion. Check or change it with the DPI tools if a print form insists on a value.

Why the PNG can be bigger or smaller than the TIFF

Both formats can be lossless, so size depends on the compression each one uses. An uncompressed TIFF usually shrinks a lot as PNG, because PNG's DEFLATE compression is better than no compression at all. A TIFF that was already LZW or ZIP compressed may come out about the same size. A photographic TIFF stays large as PNG because noise and fine texture do not compress losslessly; that is the case where JPG is the better target.

Scans of black-and-white documents are the best case for PNG: large areas of flat white compress extremely well, and text edges stay crisp enough for OCR and for zooming in on a screen.

Privacy

Nothing is uploaded. The file is decoded and re-encoded by your own browser using the Canvas API, so the image never leaves your device and there is no queue, no size cap and no account.