QRix
Open a TIFF your browser normally refuses to display and save it as a PNG — losslessly, and without the file ever leaving your device.
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TIFF is the format scanners, fax servers and print shops hand you, and it is almost the only common image format no web browser can display natively. That is why nearly every other "TIFF to PNG" site makes you upload the file to their server. This one decodes the TIFF locally instead: the compression schemes that matter — LZW (Photoshop's default), ZIP/Deflate, PackBits, uncompressed and CCITT Group 3/4 fax used by scanned black-and-white documents — are all handled in the page. PNG is the right destination when the TIFF is a scan, a diagram or line art you intend to keep editing, because both formats are lossless, so nothing degrades in the move. If your TIFF is a multi-page scan, a page selector appears and you convert whichever page you need. Expect the PNG to be smaller than the TIFF but still large; use TIFF to JPG instead when size matters more than fidelity.
No major browser ships a TIFF decoder, so a .tiff either downloads or shows a broken image. This page carries its own decoder, which is why it can display and convert the file locally.
No. Both TIFF and PNG are lossless containers here, so the PNG holds exactly the pixels the TIFF decoded to.
Yes. When a TIFF contains more than one page a selector appears and you choose which page to convert. Convert once per page you need.
Uncompressed, LZW, ZIP/Deflate, PackBits and CCITT Group 3/4 fax. JPEG-compressed and tile-based TIFFs are refused with an explanation rather than converted incorrectly — re-save those as LZW first.
No. Decoding and encoding both run in your browser, which matters because TIFFs are so often scanned contracts, IDs and medical documents.
It's free, private and works right in your browser — no signup, no watermark.