guides 2025-05-10 · 6 min read

Bedste billedformater for webben i 2025

JPEG, PNG, WebP, AVIF, HEIC — hvilket format skal du bruge? En datadrevet sammenligning med benchmarks for filstørrelse, kvalitet og kompatibilitet.

Best Image Formats for Every Use Case in 2025

Choosing the right image format in 2025 isn’t about picking one winner — it’s about matching the format to your specific needs.

Quick Decision Tree

Need transparency?
  Yes → Need animation?
    Yes → WebP or APNG
    No  → WebP lossless or PNG (fallback)
  No → Photo or graphic?
    Photo → Need max compression?
      Yes → AVIF (slow encode)
      No  → WebP (fast encode, great compression)
    Graphic → WebP lossless or PNG

Format Deep Dive

JPEG (1992)

  • Best for: Legacy compatibility
  • Avoid: When you need transparency or small file sizes
  • Quality: Lossy only

PNG (1996)

  • Best for: Graphics with text, screenshots
  • Avoid: Photographs (10x larger than WebP)
  • Quality: Lossless

WebP (2010)

  • Best for: Default choice for web
  • Avoid: When you need IE11 support
  • Quality: Both lossy and lossless

AVIF (2019)

  • Best for: Maximum compression
  • Avoid: When encode speed matters
  • Quality: Both lossy and lossless

HEIC/HEIF (2015)

  • Best for: iPhone storage
  • Avoid: Web delivery (limited browser support)
  • Quality: Excellent, but convert to WebP for web

iPhone HEIC to WebP Workflow

  1. Export HEIC from iPhone
  2. Convert with our HEIC to WebP tool
  3. Use <picture> element for fallback
  4. Profit from 50% smaller files

Convert any format to any other with AmberPic.

#formater #webp #avif #sammenligning

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