How to Convert TIFF to WebP in Your Browser

How TIFF becomes WebP

1. The browser parses the TIFF container's byte-order header and reads its first IFD (image file directory), the metadata block describing how the first page's pixel data is laid out.
2. Pixel data from that first page is decoded into standard 8-bit-per-channel RGBA, regardless of the bit depth or compression scheme the original TIFF used.
3. Any additional pages in a multi-page TIFF are left unread — the conversion works from the first page only.
4. That decoded page is drawn to canvas and passed through the browser's WebP encoder at your chosen quality, producing a single compressed, web-ready file.

What changes when you convert

TIFF files are frequently uncompressed or only lightly compressed, since the format prioritizes archival fidelity over delivery size — so converting to WebP typically produces a large size reduction, the same kind of dramatic drop you'd see moving any raw or archival bitmap to a modern codec. That makes this a natural move for a scanned document or archival photo that needs to become web-deliverable without carrying its full archival weight.

The multi-page behavior deserves a deliberate callout: TIFF is one of the few formats on this site that commonly holds more than one image, such as a multi-page scan, and this conversion reads only the first page — any additional pages simply aren't part of the output. Alpha channel data, if the source carries one, is decoded and can be preserved in the WebP output when the encoder supports it, but any bit depth beyond 8 bits per channel in the source is reduced to standard 8-bit during decoding, so a high-bit-depth archival TIFF loses that extra precision here.

When WebP is the right choice — and when it isn't

WebP makes sense once a TIFF's job shifts from archiving or print toward being viewed on the web: broad compatibility with current browsers, combined with a large size reduction from TIFF's typically uncompressed data, makes it a natural fit for publishing a scanned document or photo online. It's the wrong move if the TIFF is still doing archival or print work — TIFF's higher bit depth, multi-page structure, and often-lossless storage exist specifically to preserve detail that WebP's 8-bit, single-image, lossy-leaning pipeline isn't built to retain.

If you need every page of a multi-page TIFF represented, or need to preserve bit depth beyond 8 bits per channel, converting that file to WebP isn't the right step for this purpose — that data doesn't survive the trip.

Limitations and privacy

This conversion reads only the first page of a multi-page TIFF and decodes to standard 8-bit canvas data — any higher bit depth or additional pages in the source aren't carried into the WebP output, and there's no setting here to change either behavior.

Conversion happens entirely in your browser: the TIFF is parsed, its first page decoded, and the WebP written locally, without the file being sent to a server.