Multiple source images
Only one image is decoded; a concatenated image sequence is not exported as a complete set.
Convert PAM to JPEG
- In your browser
- No upload
- Private by design
What happens when you convert PAM to JPEG?
Opaque output
Transparency is replaced with white by default. Change the background in Advanced options.
Quality
Typical JPEG files are lossy. The original standard also defines a separate lossless mode; it is not the usual web or camera JPEG. Quality defaults to 82; adjust it in Advanced options. File size depends on the image and encoder.
PAM
Source
PAM
Portable Arbitrary Map
Compression: UncompressedTransparency: YesMetadata: Header, Comments
Portable Arbitrary Map: simple uncompressed raster samples for image-processing pipelines.
Explore PAM format →JPEG
Target
JPEG
Joint Photographic Experts Group
Compression: LossyTransparency: NoMetadata: Exif, ICC
A familiar format for photographs. JPEG keeps files compact by trading a little image detail for broad compatibility.
Explore JPEG format →Is PAM → JPEG right for you?
Good choice when
- JPEG fits your delivery use: Photographs & sharing.
- You can choose the source image or part needed for delivery.
- An opaque image is acceptable for your destination.
- You accept lossy encoding for photographic delivery.
Probably not when
- You require a complete collection, page set or multipart round trip.
- You need cutouts or translucent edges for compositing.
- You need an exact pixel reference or repeated lossless editing.
- You require identical samples without a defined colour and precision policy.
PAM to JPEG conversion details
- Multiple source images
- Only one image is decoded; a concatenated image sequence is not exported as a complete set.
- Opaque output
- Transparency is replaced with white by default. Change the background in Advanced options.
- Quality
- Typical JPEG files are lossy. The original standard also defines a separate lossless mode; it is not the usual web or camera JPEG. Quality defaults to 82; adjust it in Advanced options. File size depends on the image and encoder.
- 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
- PAM: Uncompressed → JPEG: Lossy PAM: 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. JPEG: Typical JPEG files are lossy. The original standard also defines a separate lossless mode; it is not the usual web or camera JPEG.
- Transparency
- Transparency is replaced with white by default. Change the background in Advanced options.
- Colour depth
- PAM: 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.
What happens to transparent areas?
Transparency is replaced with white by default. Change the background in Advanced options.
Can converting PAM to JPEG reduce quality?
Typical JPEG files are lossy. The original standard also defines a separate lossless mode; it is not the usual web or camera JPEG. Quality defaults to 82; adjust it in Advanced options. File size depends on the image and encoder.
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.