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AVIF vs PNM

AVIF vs PNM

A detailed comparison of AVIF Image and Portable Anymap — file size, quality, compatibility, and which format to choose for your workflow.

Convert AVIF → PNM Convert PNM → AVIF
AVIF

AVIF Image

Raster & Vector Images

AVIF is a next-generation image format based on the AV1 video codec. It offers significantly better compression than JPEG and WebP while maintaining excellent visual quality, including HDR and wide color gamut support.

About AVIF files
PNM

Portable Anymap

Raster & Vector Images

PNM (Portable Anymap) is a family of simple image formats comprising PBM, PGM, and PPM. These formats store pixel data in straightforward ASCII or binary layouts, making them easy to generate and parse programmatically.

About PNM files

Strengths Comparison

AVIF Strengths

  • Best-in-class compression efficiency — 30-50% smaller than JPEG for the same quality.
  • Royalty-free and patent-unencumbered (unlike HEIC).
  • Supports alpha transparency, HDR, wide gamut (BT.2020), and up to 12-bit color.
  • Progressive decoding: a blurry preview appears while the file is still downloading.
  • Supported in all major browsers since late 2022 — no polyfills needed.

PNM Strengths

  • Stupidly simple — a 50-line parser handles every variant.
  • ASCII variant is human-readable and diff-able.
  • Universal Unix tooling support.
  • 40+ years of stability.
  • Wildcard extension covers three related formats.

Limitations

AVIF Limitations

  • Encoding is CPU-expensive — an AVIF export can take 10-30× longer than JPEG.
  • Older software (pre-2022) cannot open AVIF without plugins.
  • Email clients still largely ignore it — stick to JPEG for attachments.
  • Metadata support (EXIF, XMP) exists but tooling is less mature than for JPEG.

PNM Limitations

  • No compression — files are huge.
  • No color profile, metadata, or transparency.
  • Strictly a pipeline intermediate, not a delivery format.

Technical Specifications

Specification AVIF PNM
MIME type image/avif image/x-portable-anymap
Container HEIF (ISOBMFF) —
Codec AV1 (intra-only) —
Max dimensions 65 536 × 65 536 px —
Color depth Up to 12-bit per channel —
Color spaces sRGB, Display-P3, BT.2020, arbitrary ICC —
Extension — .pnm (umbrella), .pbm, .pgm, .ppm
Variants — P1-P6 (ASCII or binary × bitmap/graymap/pixmap)
Toolkit — Netpbm
Creator — Jef Poskanzer (1988)

Typical File Sizes

AVIF

  • Thumbnail (400px) 10-30 KB
  • Web photo (1920px) 80-300 KB
  • 4K photo (3840px) 300 KB - 1.2 MB
  • Lossless copy of 24MP photo 8-15 MB

PNM

  • 512×512 grayscale (binary) ~256 KB
  • 1920×1080 RGB (binary) ~6 MB

Ready to convert?

Convert between AVIF and PNM online, free, and without installing anything. Encrypted upload, automatic deletion after 2 hours.

Convert AVIF to PNM Convert PNM to AVIF

Frequently Asked Questions

AVIF (AV1 Image File Format) is a cutting-edge image format derived from the AV1 video codec, backed by the Alliance for Open Media. It delivers up to 50% smaller files than JPEG with equal or better visual quality, plus HDR and transparency support.

PNM (Portable Anymap) is an image format used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family and designed around a specific trade-off between file size, visual fidelity, and feature support (transparency, colour depth, compression type). Photographers, web designers, and content creators choose PNM when its particular strengths match the publishing target.

AVIF files open in Chrome, Firefox, Safari (from macOS Ventura), Edge, and GIMP 2.10+. Support is growing rapidly, but some older image editors may not yet handle AVIF natively.

Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) open PNM natively. On mobile, iOS Photos and Google Photos display PNM in the gallery when supported by the OS. If the format is rare or new, convert to JPG or PNG first — both are universally readable — using our PNM to JPG or PNM to PNG converter.

AVIF provides better compression and quality than WebP, especially for photographs. However, WebP has broader software support today. Use AVIF for maximum performance on modern browsers and WebP as a reliable fallback.

Upload the PNM to KaijuConverter and pick a target format (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in the browser via ImageMagick and returns a download in seconds. No account or installation required; both input and output delete automatically within two hours.