Convert HEIC images to PNM online with ImageHQ.
or drag and drop images here
Fast async jobs
No install required
Temporary files
Batch uploads
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.heic
pnm
/v1/convert
Submit files to /v1/convert, poll the job endpoint, then download outputs programmatically.
PNM does not support alpha transparency. Transparent HEIC areas must be flattened onto a background color.
Animated, sequence, or multipage inputs need explicit frame/page handling.
Converting HEIC to PNM decodes the source image and writes a PNM output. Use this route when PNM is a better fit for compatibility, file size, editing, or delivery.
Quality behavior depends on PNM compression: uncompressed.
Choose conversion targets based on PNM compression, transparency, animation, metadata, and compatibility requirements.
Known metadata support: Exif, XMP, HEIF item properties, thumbnails, derived images.
Supported by ImageMagick, Netpbm, and technical imaging tools.
ISO - standards_body
Nokia Technologies - developer_documentation
Apple Support - official_vendor_doc
ImageMagick - library_documentation
Netpbm - official_project_documentation
Netpbm - official_project_documentation