Multiple source images
Only one image is decoded; a concatenated image sequence is not exported as a complete set.
Convert PGM to PPM
- In your browser
- No upload
- Private by design
What happens when you convert PGM to PPM?
No new colour information
The source stores grayscale or bitonal values. A colour-capable PPM can represent these tones, but conversion cannot infer original scene colours or recover missing intermediate shades. Colourisation would be a separate image-editing operation.
Lossless sample storage
Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PPM can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
PGM
Source
PGM
Portable Graymap
Compression: UncompressedTransparency: NoMetadata: Header, Comments
Portable Graymap: simple uncompressed raster samples for image-processing pipelines.
Explore PGM format →PPM
Target
PPM
Portable Pixmap
Compression: UncompressedTransparency: NoMetadata: Header, Comments
Portable Pixmap: simple uncompressed raster samples for image-processing pipelines.
Explore PPM format →Is PGM → PPM right for you?
Good choice when
- PPM fits your delivery use: RGB processing & debugging.
- You can choose the source image or part needed for delivery.
- You need the existing gray or binary image in a compatible delivery format.
- You need lossless storage of the rendered samples supported by PPM.
Probably not when
- You require a complete collection, page set or multipart round trip.
- You expect automatic colourisation or reconstruction of absent tones.
- You expect lossless encoding to restore lost details or editing structure.
- You require identical samples without a defined colour and precision policy.
PGM to PPM conversion details
- Multiple source images
- Only one image is decoded; a concatenated image sequence is not exported as a complete set.
- No new colour information
- The source stores grayscale or bitonal values. A colour-capable PPM can represent these tones, but conversion cannot infer original scene colours or recover missing intermediate shades. Colourisation would be a separate image-editing operation.
- Lossless sample storage
- Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PPM can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
- Sample precision & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Metadata & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Compression
- PGM: Uncompressed → PPM: Uncompressed PGM: Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PPM: Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning.
- Colour depth
- PGM: maxval up to 65535 → PPM: maxval up to 65535
- Dimensions
- Rendered image dimensions are retained within the converter limits; this tool does not offer resizing. Orientation handling depends on the source decoder.
- Metadata
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Common questions
Will every source image be exported?
Only one image is decoded; a concatenated image sequence is not exported as a complete set.
Can conversion restore colour or missing shades?
The source stores grayscale or bitonal values. A colour-capable PPM can represent these tones, but conversion cannot infer original scene colours or recover missing intermediate shades. Colourisation would be a separate image-editing operation.
Does lossless output mean an unchanged source?
Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PPM can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
Are bit depth and colour values guaranteed to match?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Will metadata and colour profiles be retained?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.