Best image format for blog images
How to choose the right format for editorial hero images, in-article visuals, and share previews.
Blog imagery spans article heroes, screenshots, diagrams, and social previews. The answer changes by slot, but the best general web-delivery default is still usually WebP or AVIF.
Primary delivery
WebP with AVIF where supported
Social companion
Separate Open Graph export as needed
Watch closely
Editorial workflow and mixed asset types
Recommendation
For standard editorial photos and feature images, deliver WebP or AVIF. Keep PNG only for diagrams or UI captures that genuinely benefit from lossless handling.
Treat the article as a mix of assets
- Hero photography: AVIF or WebP.
- Diagrams with hard edges: test PNG versus WebP carefully.
- Screenshots: keep a cleaner source and test text legibility before delivery conversion.
Where teams usually lose quality
The common failure is using one export preset for every article asset. Editorial pages are mixed-media pages, not a single image class.
Checklist
- Use modern formats for photographic article art.
- Split screenshot and diagram handling from photo handling.
- Export a separate social card when the platform demands it.
- Keep article-image dimensions consistent across the publication.
Common mistakes
- Using PNG for all blog images because a few diagrams need it.
- Compressing screenshots until text becomes muddy.
- Forgetting that social-card crops often need a separate export.
Quick answers
What is the best format for blog images overall?
For most editorial photography and feature art, WebP or AVIF is the best delivery choice. PNG should be reserved for graphics that truly need it.
Should Open Graph images use the same file as the article hero?
Not always. Social crops and on-page crops often have different aspect-ratio needs.
Related pages
Reference
Open Graph image size guide
The practical dimensions, aspect ratio, and file-prep rules for social share images that need to preview cleanly.
Reference
Blog featured image size guide
Recommended dimensions and aspect-ratio rules for article featured images that need to work on-page and across social previews.
Comparison
AVIF vs WebP for website images
Which format to ship when the tradeoff is compression efficiency versus implementation safety on the web.
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