Why is PPM output so large?

This tool writes binary P6 PPM — a short text header followed by raw, uncompressed RGB bytes, with no compression or palette reduction applied to the decoded HEIC pixels at all.

What happens with a multi-image HEIC file?

Each image inside a multi-image HEIC — a burst or Live Photo — becomes its own PPM file. A single-photo HEIC downloads one .ppm; a burst or Live Photo downloads a ZIP with one PPM 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 PPM Converter

Convert HEIC and HEIF photos to binary PPM directly in your browser — a simple, lossless RGB format for developer and scientific workflows.

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HEIC to PPM processes files locally in your browser.

What HEIC to PPM conversion does

Convert a HEIC photo from your iPhone into binary PPM directly in your browser. PPM (Portable Pixmap, part of the Netpbm family) is a trivially simple, uncompressed RGB format that computer-vision, image-processing, and academic tooling can read with a few lines of code — no HEVC decoder or HEIC parser required.

How to convert HEIC to PPM

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

Why use this conversion

Many computer-vision libraries, image-processing pipelines, and academic tools read PPM directly with minimal code, sidestepping the need to link a HEIC/HEIF decoder just to load one photo — which is exactly why the format stays popular in that space.

Transparency and output quality

PPM has no alpha channel at all. Any transparent pixels in the decoded HEIC image are flattened onto a white background, the same convention used for JPG output. This tool writes binary P6 PPM: a short text header followed by raw, uncompressed RGB bytes — the largest of the output formats on this site, since it applies no compression or palette reduction on top of the already-decoded HEIC pixels.

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.
PPM rarely opens in everyday photo software without a plugin — it's intended for developer, scientific, and academic pipelines, not as a general replacement for viewing HEIC photos.
A multi-image HEIC — a burst or Live Photo — produces one PPM 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 PPM FAQ

Why convert HEIC to PPM?: Many computer-vision libraries, image-processing pipelines, and academic tools read PPM directly with minimal code, sidestepping the need to link a HEIC/HEIF decoder just to load one photo — which is exactly why the format stays popular in that space.
Does PPM output keep transparency?: No. PPM has no alpha channel at all. Any transparent pixels in the decoded HEIC image are flattened onto a white background, the same convention used for JPG output.
Why is PPM output so large?: This tool writes binary P6 PPM — a short text header followed by raw, uncompressed RGB bytes, with no compression or palette reduction applied to the decoded HEIC pixels at all.
What happens with a multi-image HEIC file?: Each image inside a multi-image HEIC — a burst or Live Photo — becomes its own PPM file. A single-photo HEIC downloads one .ppm; a burst or Live Photo downloads a ZIP with one PPM 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.