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Free online converter for converting files to PPM.

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How to convert files to PPM?

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Click the 'Choose File' button or drag and drop your file into the upload area. Supported formats include PNG, JPG, WEBP and more.

Select the output format

Make sure PPM is selected as the conversion format. Adjust additional settings if needed.

Start the conversion process

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Download the result

Once the process is complete, click the 'Download' button and save the file in PPM format.

.PPM

PPM

Portable Pixmap Format

Data type	Image
MIME type	image/x-portable-pixmap
Developer	Jef Poskanzer / Netpbm (Pbmplus) community
Primary use cases	Interchange and intermediate format in image processing pipelines, teaching/computer graphics demos, simple dumps from renderers, quick conversions to/from other formats.

What is the PPM file format?

PPM is a simple, uncompressed Netpbm image format for RGB raster data, widely used as an easy-to-parse interchange and intermediate format (P3 ASCII or P6 binary).

PPM file characteristics

Data type	Image
MIME type	image/x-portable-pixmap
Compression	None (uncompressed); P3 is ASCII text, P6 is raw binary
Color depth	Per-channel depth depends on Maxval: commonly 8-bit (Maxval 255), can be up to 16-bit (Maxval up to 65535)
Color space	RGB
Transparency support	No
Animation support	No
Resolution support	Stores pixel dimensions (width/height). No standardized physical DPI; any physical sizing is external.
Metadata	No Exif; header contains only basic image parameters (dimensions, Maxval). Comments via '#'.
Standard / Specification	Netpbm PPM format specification
Typical file size	Usually large: roughly 3 bytes/pixel for 8-bit P6 (plus header), or much larger for P3 ASCII; 16-bit doubles raster size.
Year introduced	1988

Advantages

The PPM file format offers several advantages that make it suitable for common use cases.

Extremely simple to parse and generate;
Supports both human-readable (P3) and efficient binary (P6);
Lossless pixel storage;
Good as an intermediate format.

Limitations

The PPM file format has certain limitations that may affect its use in specific scenarios.

Not an IANA-registered MIME type;
Support varies by software. Many older tools expect Maxval ≤ 255 and a single image per file;
High Maxval (16-bit) and multiple-image streams may break legacy decoders.

Compatibility

PPM images are widely supported and can be viewed on most devices and platforms.

Supported platforms: Windows, macOS, Linux (via Netpbm tools, ImageMagick, GIMP and many libraries)
Supported devices: Computers and servers (intermediate/pipeline use); not common in consumer devices
Browser support: No
Mobile support: No
Cloud support: No
Backward compatibility: Yes

Security considerations

Treat as untrusted input: huge dimensions can cause resource exhaustion; malformed headers/raster can trigger decoder bugs. Strip comments if you need deterministic parsing.

License

Open, publicly documented format (Netpbm documentation)

PPM (Portable Pixmap Format) is part of the Netpbm family (PBM/PGM/PPM, often called PNM). A PPM file contains a small ASCII header and an RGB raster. There are two common encodings: P3 (plain/ASCII) stores samples as decimal text, and P6 (raw/binary) stores samples as 1 or 2 bytes per channel depending on Maxval. The format is intentionally “lowest common denominator”: easy to write and read, but typically very large and not web-friendly.