Image Format Recommender
Recommend the right image format (WebP, AVIF, PNG, JPEG) for your use case.
The same picture can be several times larger or smaller depending on the format you save it in. Tell this tool what the image is (photo, illustration, logo, or screenshot), whether it needs transparency or animation, and whether you care more about the smallest file size or the widest compatibility. It then recommends the best format with the reasoning and generates a ready-to-paste <picture> snippet.
AVIF, WebP, PNG, JPEG, GIF and SVG each have different strengths: lossy formats shine for photos, while vectors win for logos and simple shapes. The wrong choice means wasted bytes and a slower LCP (Largest Contentful Paint). Based on simple heuristics, the tool favors modern formats first and suggests fallbacks for older browsers.
| Recommended | AVIF |
|---|---|
| Fallback order | AVIF → WebP → JPEG |
Why: Continuous-tone photos are smallest in AVIF (strong lossy compression), with WebP as a broad fallback and JPEG as the final legacy fallback.
<picture> <source srcset="image.avif" type="image/avif" /> <source srcset="image.webp" type="image/webp" /> <img src="image.jpg" alt="image" width="800" height="600" loading="lazy" decoding="async" /> </picture>
When to use AVIF, WebP, JPEG and PNG
Each format was built for a purpose. Photos with smooth color gradients suit lossy compression, while graphics with crisp text and lines suit lossless or vector formats.
- AVIF: The highest compression. At equal quality it is typically 50%+ smaller than JPEG and ~20% smaller than WebP. Strong for both photos and graphics, with transparency and animation support.
- WebP: Broader compatibility than AVIF and smaller than JPEG/PNG. Supports lossy, lossless, transparency and animation, making it an all-round fallback.
- JPEG: The legacy photo standard. No transparency, but it opens everywhere — ideal as a final fallback.
- PNG: Lossless with transparency. Use it as a fallback for simple graphics and icons, but it is inefficient for photos.
- GIF: An old animation format. Its 256-color limit and large size mean you should replace it with AVIF/WebP animation when possible.
- SVG: Vector. Logos, icons and simple shapes stay crisp at any resolution and stay tiny as SVG.
Browser support and fallback strategy
WebP is supported in every major browser since 2020, and AVIF is broadly supported in Chrome, Firefox, Safari (16+) and Edge. Some older browsers and email/design tools still cannot read AVIF, so in practice you use a <picture> element to offer the newest format first and gracefully fall back when a browser cannot decode it.
- Put the newest format (AVIF) in the first
source. - Put WebP in the next
source. - Put the most compatible fallback (JPEG/PNG) in the final
imgsrc.
The browser picks the first candidate it supports from the top, so a single bit of markup serves a small file to modern clients and a safe file to old ones.
Things to watch when applying the recommendation
After switching formats, compare the actual file sizes. Very small icons can grow due to AVIF header overhead. For above-the-fold images where loading priority matters, also set proper width/height and a loading attribute to avoid Cumulative Layout Shift (CLS). To see how many image and script references a page carries, check it with the page weight analyzer.