Images · Best format for…
Best Image Format for Small File Size
Smallest file depends on content. Photos, flat UI, and vector logos each have a different winner.
Quick take: AVIF and WebP usually beat JPG for photos. Lossless WebP often beats PNG for simple graphics. SVG wins for simple logos. Compress smartly — do not just switch formats blindly.
Formats to consider
AVIF
Often smallest for photosTop-tier still compression on modern stacks.
Pros
- Tiny photos
Cons
- Encode time
- Fallbacks
WEBP
Best practical small web formatGreat savings with easier tooling than AVIF.
Pros
- Photos + graphics modes
- Alpha
Cons
- Legacy gaps
JPG
Small classic photosLower quality settings shrink fast — watch artifacts.
Pros
- Universal
Cons
- Beaten by WebP/AVIF often
SVG
Smallest for simple logosMath beats pixels for shapes.
Pros
- Tiny + sharp
Cons
- Not for photos
PNG
Not for smallest photosUse only when lossless/alpha matters.
Pros
- Lossless
Cons
- Heavy photos
Recommendations by situation
Photo gallery performance
Pick: AVIF or WebP
Biggest wins on continuous-tone images.
Simple logo
Pick: SVG
Orders of magnitude smaller than a big PNG.
Transparent UI icon
Pick: Lossless WebP or compact PNG
Alpha without a huge photo-style encode.
Must stay JPG
Pick: Recompress carefully + resize dimensions
Pixel dimensions often matter more than format myths.
Convert now
Turn the recommendation into a file — every converter between these formats is linked below. Processing stays in your browser.
All related converters (71)
Related comparisons
Related “best format” guides
FAQ
Is a 4000px AVIF always smaller than a 1200px JPG?
Not necessarily. Resize to displayed size first, then pick a modern format.
Browse all best format guides or jump to every converter.