Why is the TIFF file so much larger than the source?

HEIC photos are already compressed with Apple's efficient HEVC codec; this tool writes raw, uncompressed RGBA TIFF pixel data instead, which is why the output typically runs several times larger than the source file — a deliberate tradeoff for fidelity, not a bug.

What happens with a multi-image HEIC file?

Each image inside a multi-image HEIC — a burst or Live Photo — becomes its own TIFF file. A single-photo HEIC downloads one .tiff; a burst or Live Photo downloads a ZIP with one TIFF per captured image, never just the first one.

Are my files uploaded?

No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.

What is validated before conversion?

The file must actually be a HEIC/HEIF container — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.

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HEIC to TIFF Converter

Convert HEIC and HEIF photos to TIFF directly in your browser — useful for print, scanning, publishing, and archival workflows.

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HEIC to TIFF processes files locally in your browser.

What HEIC to TIFF conversion does

Convert a HEIC photo from your iPhone into TIFF directly in your browser. TIFF is the format print shops, scanning software, and long-term archives ask for instead of a phone-native, lossily-compressed format like HEIC.

How to convert HEIC to TIFF

Choose a HEIC file.
Select Convert & download.
Save the .tiff file from your browser downloads.

Why use this conversion

Archival, scanning, and print-production workflows often specifically require TIFF rather than a compressed consumer format straight off a phone, since TIFF stores pixel data without any further lossy recompression and is universally supported by professional imaging software.

Transparency and output quality

Output is uncompressed 8-bit RGBA, so any alpha channel present in the decoded HEIC image carries over intact. This tool writes uncompressed TIFF pixel data with no compression scheme applied, so the file is typically several times larger than the source HEIC — though note that switching to a lossless format like TIFF can't restore detail already lost to HEIC's own lossy HEVC compression, it only stops any further generation loss from here on.

Privacy and local processing

Processing occurs locally in the browser.
Files are not uploaded to Looty Tools for conversion.
Converted files remain on your device.

Limits and known issues

Input: HEIC/HEIF (.heic, .heif) only, up to 25.0 MB and 8,192 px per side.
This is a standard baseline uncompressed TIFF. Software expecting a specific compressed TIFF variant (LZW, ZIP) should still be able to open it, since compression is optional in the TIFF spec.
A multi-image HEIC — a burst or Live Photo — produces one TIFF per captured frame, delivered as a ZIP when there's more than one; every decoded image is kept.
Metadata is not preserved in the downloaded file.

Related tools

Guides

HEIC to TIFF FAQ

Why convert HEIC to TIFF?: Archival, scanning, and print-production workflows often specifically require TIFF rather than a compressed consumer format straight off a phone, since TIFF stores pixel data without any further lossy recompression and is universally supported by professional imaging software.
Does TIFF output keep transparency?: Yes. Output is uncompressed 8-bit RGBA, so any alpha channel present in the decoded HEIC image carries over intact.
Why is the TIFF file so much larger than the source?: HEIC photos are already compressed with Apple's efficient HEVC codec; this tool writes raw, uncompressed RGBA TIFF pixel data instead, which is why the output typically runs several times larger than the source file — a deliberate tradeoff for fidelity, not a bug.
What happens with a multi-image HEIC file?: Each image inside a multi-image HEIC — a burst or Live Photo — becomes its own TIFF file. A single-photo HEIC downloads one .tiff; a burst or Live Photo downloads a ZIP with one TIFF per captured image, never just the first one.
Are my files uploaded?: No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.
What is validated before conversion?: The file must actually be a HEIC/HEIF container — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.