Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your PPM images to QOI format. This tool works for both professionals and casual users. Convert your images to QOI in seconds.
Portable Pixel Map
The standard uncompressed color format of the Netpbm suite.
PPM (Portable Pixel Map) is the color counterpart to PGM and PBM. It is the most widely used format in the Netpbm library for storing full-color RGB images. Like its siblings, it is designed for extreme simplicity and ease of interchange between Unix tools.
PPM files come in two flavors: P3 (ASCII) and P6 (Binary). - **ASCII (P3)**: Pixels are written as readable RGB triplets (e.g., `255 0 0` for red). - **Binary (P6)**: Pixels are raw byte triplets. The header is minimal: Magic Number, Width, Height, Maxval. It does not support alpha channels (use PAM for that) or compression.
Developed by Jef Poskanzer in 1991 to bring color support to the pbmplus (Netpbm) toolkit. It became the lingua franca for Unix graphics utilities.
Quite OK Image Format
Lossless compression that is incredibly fast.
QOI (Quite OK Image Format) is a modern lossless image format created by Dominic Szablewski in 2021. It was designed to be a simpler, faster alternative to PNG, prioritizing encoding and decoding speed over maximum compression ratio.
The QOI specification fits on a single page of paper. It achieves compression ratios similar to PNG but encodes 20x-50x faster and decodes 3x-4x faster. It uses a simple streaming algorithm with a running array of previously seen colors.
Released in 2021 as a reaction to the complexity of formats like PNG and the slowness of their reference implementations. It quickly gained viral popularity in the developer community.
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Convert images files between over 20 formats. We support popular formats like PNG, JPG, WebP, HEIC and more.
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