---
title: PNG Image Properties
framework: imageio
role: collectionGroup
role_heading: API Collection
path: imageio/png-image-properties
---

# PNG Image Properties

Metadata keys for the Portable Network Graphics (PNG) format.

## Topics

### Dictionary

- [kCGImagePropertyPNGDictionary](imageio/kcgimagepropertypngdictionary.md)

### Properties

- [kCGImagePropertyPNGSource](imageio/kcgimagepropertypngsource.md)

### Image Properties

- [kCGImagePropertyAPNGCanvasPixelHeight](imageio/kcgimagepropertyapngcanvaspixelheight.md)
- [kCGImagePropertyAPNGCanvasPixelWidth](imageio/kcgimagepropertyapngcanvaspixelwidth.md)
- [kCGImagePropertyPNGXPixelsPerMeter](imageio/kcgimagepropertypngxpixelspermeter.md)
- [kCGImagePropertyPNGYPixelsPerMeter](imageio/kcgimagepropertypngypixelspermeter.md)
- [kCGImagePropertyPNGGamma](imageio/kcgimagepropertypnggamma.md)
- [kCGImagePropertyPNGInterlaceType](imageio/kcgimagepropertypnginterlacetype.md)
- [kCGImagePropertyPNGsRGBIntent](imageio/kcgimagepropertypngsrgbintent.md)
- [kCGImagePropertyPNGChromaticities](imageio/kcgimagepropertypngchromaticities.md)

### Sequence Timing

- [kCGImagePropertyAPNGFrameInfoArray](imageio/kcgimagepropertyapngframeinfoarray.md)
- [kCGImagePropertyAPNGDelayTime](imageio/kcgimagepropertyapngdelaytime.md)
- [kCGImagePropertyAPNGUnclampedDelayTime](imageio/kcgimagepropertyapngunclampeddelaytime.md)
- [kCGImagePropertyAPNGLoopCount](imageio/kcgimagepropertyapngloopcount.md)

### Descriptive Information

- [kCGImagePropertyPNGTitle](imageio/kcgimagepropertypngtitle.md)
- [kCGImagePropertyPNGDescription](imageio/kcgimagepropertypngdescription.md)
- [kCGImagePropertyPNGComment](imageio/kcgimagepropertypngcomment.md)
- [kCGImagePropertyPNGDisclaimer](imageio/kcgimagepropertypngdisclaimer.md)
- [kCGImagePropertyPNGWarning](imageio/kcgimagepropertypngwarning.md)
- [kCGImagePropertyPNGAuthor](imageio/kcgimagepropertypngauthor.md)
- [kCGImagePropertyPNGCopyright](imageio/kcgimagepropertypngcopyright.md)
- [kCGImagePropertyPNGCreationTime](imageio/kcgimagepropertypngcreationtime.md)
- [kCGImagePropertyPNGModificationTime](imageio/kcgimagepropertypngmodificationtime.md)
- [kCGImagePropertyPNGSoftware](imageio/kcgimagepropertypngsoftware.md)

### Pre-Compression Filters

- [kCGImagePropertyPNGCompressionFilter](imageio/kcgimagepropertypngcompressionfilter.md)
- [IMAGEIO_PNG_NO_FILTERS](imageio/imageio_png_no_filters.md)
- [IMAGEIO_PNG_FILTER_NONE](imageio/imageio_png_filter_none.md)
- [IMAGEIO_PNG_FILTER_SUB](imageio/imageio_png_filter_sub.md)
- [IMAGEIO_PNG_FILTER_UP](imageio/imageio_png_filter_up.md)
- [IMAGEIO_PNG_FILTER_AVG](imageio/imageio_png_filter_avg.md)
- [IMAGEIO_PNG_FILTER_PAETH](imageio/imageio_png_filter_paeth.md)

## See Also

### Format-Specific Properties

- [CIFF Image Properties](imageio/ciff-image-properties.md)
- [DNG Image Properties](imageio/dng-image-properties.md)
- [GIF Image Properties](imageio/gif-image-properties.md)
- [HEIC Image Properties](imageio/heic-image-properties.md)
- [JFIF Image Properties](imageio/jfif-image-properties.md)
- [TGA Image Properties](imageio/tga-image-properties.md)
- [TIFF Image Properties](imageio/tiff-image-properties.md)
- [8BIM Image Properties](imageio/8bim-image-properties.md)