Add your AVIF file
Drop one or more .avif files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
AVIF to PGM
Converting a .avif image to .pgm re-encodes the pixels for a different balance of size, quality, and support. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop AVIF files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting AVIF image to Portable graymap
Converting a .avif image to .pgm re-encodes the pixels for a different balance of size, quality, and support. An .avif file stores a still image (or sequence) coded with the AV1 video codec inside a HEIF-derived container. It is currently among the most efficient image formats deployed on the web, routinely beating JPEG by half at similar quality while adding HDR, wide gamut, and alpha.
A .pgm file is a Portable Graymap: a single-channel greyscale image storing one intensity value per pixel, with the maximum value declared in the header. It is the middle rung of the Netpbm ladder — richer than a one-bit bitmap, simpler than a colour pixmap. For this route the practical draw is raw samples in a declared range — no codec, no colour management, nothing to misinterpret and supports 16-bit depth, which most consumer formats do not — balanced against uncompressed, so files are large relative to PNG for the same data, which is worth knowing before you commit a large batch.
Why convert AVIF to PGM?
The practical trigger for this conversion is usually a mismatch: with .avif, encoding is much slower than JPEG or WebP, especially at high effort settings. Switching to .pgm buys you raw samples in a declared range — no codec, no colour management, nothing to misinterpret, which is why it is the better fit for machine vision and image-processing pipelines that operate on intensity alone. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
AVIF vs PGM at a glance
| Aspect | AVIF image (.avif) | Portable graymap (.pgm) |
|---|---|---|
| Format type | Lossy — discards detail it judges invisible to shrink files | Lossless — every pixel or sample is preserved exactly |
| How it stores data | encodes AV1 intra frames; both lossy and a mathematically lossless mode are defined | p2 stores samples as whitespace-separated ASCII integers; P5 stores them as raw bytes |
| Strongest at | serving hero images and photo galleries where bandwidth savings are significant | machine vision and image-processing pipelines that operate on intensity alone |
| Weak spot | encoding is much slower than JPEG or WebP, especially at high effort settings | uncompressed, so files are large relative to PNG for the same data |
| Metadata | eXIF and XMP are stored as metadata items in the HEIF container alongside ICC profiles or CICP color signaling, and mainstream encoders preserve them on conversion | none beyond header comments. No colour profile, no EXIF, no acquisition metadata — anything an instrument recorded alongside the pixels has to travel in a separate file |
Pick PGM as the output
Select .pgm in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if PGM is selectable, the route is real and validated.
Convert on your device
Press Convert. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid PGM file. Outputs keep the original filename with the .pgm extension.
AVIF to PGM questions, answered
Will converting AVIF to PGM lose quality?
No new loss is introduced — since avif is lossy-oriented and pgm is lossless-oriented, everything the .avif file still contains is carried over exactly. What was already discarded by the original lossy encode cannot be recovered, though; converting to .pgm does not "restore" quality.
Is it private to convert AVIF files here?
Yes — the .avif file is processed inside your browser tab and never uploaded. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders. Close the tab and the file is gone from memory.
Where will the PGM file work?
Standard in scientific and machine-vision toolchains — OpenCV, ImageMagick, MATLAB and Netpbm all read it — and absent from consumer software and browsers. Novus Convert decodes both ASCII and binary PGM locally, honours the declared maximum value when scaling to 8-bit output, and converts to the standard raster formats.
Will the PGM file be bigger or smaller than my AVIF?
Larger, sometimes much larger. A lossless .pgm must store every pixel or sample the decoder produced, without the perceptual shortcuts .avif used. Use this route for editing headroom, not for saving space.
What happens to the metadata in my AVIF file?
In .avif, eXIF and XMP are stored as metadata items in the HEIF container alongside ICC profiles or CICP color signaling, and mainstream encoders preserve them on conversion. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.
Can I convert PGM back to AVIF?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .avif → .pgm → .avif is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.