Use JPEG for ordinary photographs, PNG when lossless detail or transparency matters, WebP for a broadly supported modern web default, and AVIF when smaller delivery is worth extra encoding and fallback work. Test the real image instead of choosing by format reputation alone.

What current primary sources establish

  • MDN: Image file type and format guide: Compares JPEG, PNG, WebP, and AVIF, including transparency and compression tradeoffs.
  • Apple: Using HEIF or HEVC media: Explains when Apple devices preserve HEIF and when sharing may convert it to a more compatible format.

Recommended workflow

  • Classify the source as a photograph, screenshot, logo, illustration, animation, or transparency-dependent asset before choosing a format.
  • Export comparable JPEG, PNG, WebP, or AVIF derivatives from the same original and record dimensions, settings, bytes, and encoder.
  • Inspect edges, gradients, text, alpha, color, and decoding in the real browser and content-delivery path.
  • Choose the smallest acceptable output with suitable compatibility, and keep a fallback only when the audience or workflow requires it.

Choose the next action

  • Keep the source format when the destination accepts it and no delivery problem exists.
  • Create a derivative when the destination needs different dimensions, transparency, compatibility, or byte size.
  • Use a specialist color or print workflow when profiles, spot colors, proofs, or contractual reproduction quality matter.

Decision boundary

Pixel dimensions, format, transparency, metadata, and byte size are separate decisions. A smaller file is successful only when the destination accepts it and the image still communicates the required detail.

Final quality checks

  • Record the destination's required format, pixels, aspect ratio, transparency, and byte limit.
  • Inspect edges, text, faces, gradients, and color at 100% zoom; keep the source image.
  • Test the actual upload or rendered placement rather than relying on an estimated compression percentage.

Common mistakes to avoid

  • Changing format when a simple resize would solve the problem.
  • Ignoring transparency, orientation metadata, color profiles, or crop behavior.
  • Upscaling a weak source and treating invented pixels as recovered detail.
  • Judging quality from a thumbnail instead of checking the final placement.

Retargeted to a decision guide. Keep png-vs-jpg-vs-webp.tsx as the format-by-format technical comparison.

Where LoveMyFile fits

Use the LoveMyFile image converter for the bounded task described here. Keep any authoritative source or original when applicable, inspect the output, and use the official destination or an approved specialist system for requirements outside that task.

Sources and review date

Sources below were reviewed on September 2, 2026. Reopen time-sensitive requirements, limits, prices, policies, and interfaces before acting.

This article provides technical and editorial guidance. It is not legal, medical, tax, immigration, or compliance advice.