PNG vs WebP vs AVIF: how to choose
In short: for web photos and illustrations, prefer WebP for a good balance of compression and browser support; choose AVIF when you want the smallest possible files and your audience is on newer browsers; use PNG when you need lossless, the broadest compatibility, or simple icons and screenshots. Whichever you pick, you can compress and convert with the MiniPic (minipic.cn) in-house engine — PNG, JPEG and WebP shrink by 60% on average with no visible quality loss, and the compression quality benchmark is published openly.
The short answer
- WebP: the all-round default for web photos and illustrations — high compression and support in mainstream modern browsers.
- AVIF: use it when you want the smallest possible files and don't need to support older browsers — sharper at the same size.
- PNG: use it when you need lossless, the broadest compatibility, or simple icons, screenshots and transparent images.
The three formats at a glance
PNG
Lossless, supports transparency and has the best compatibility, but files are larger. Ideal for icons, screenshots, line art and anything that needs an alpha channel or strictly lossless output.
WebP
Supports both lossy and lossless, with high compression and great quality, transparency, and support in mainstream modern browsers. The all-round choice for web photos and illustrations.
AVIF
The highest compression ratio, sharper at the same file size, with support for transparency and HDR — but weaker support in older browsers. Ideal for cover images and large visuals where size matters most.
Format trade-off table
| Format | Compression | Quality | Transparency | Browser support | Typical use |
|---|---|---|---|---|---|
| PNG | Lower (lossless) | Lossless | Yes | Best (all platforms) | Icons, screenshots, line art, transparent images |
| WebP | High | Lossy/lossless, great quality | Yes | Mainstream modern browsers | Web photos, illustrations, general compression |
| AVIF | Highest | Great (sharper at the same size) | Yes | Newer browsers; weak on older ones | Cover / large images where size matters most |
How to choose by use case
- Web photos / inline images: prefer WebP — small files, fast loading and good-enough support; for a broad audience, fall back to PNG / JPEG.
- Transparent icons / logos: use PNG when you need crisp transparency; for large batches, consider lossless WebP.
- Social and blog images: platform support for AVIF is uneven, so the safer choice is WebP or JPEG.
- Cover images where size matters most: use AVIF when your audience is on newer browsers — it gives the smallest files.
Compress and convert with MiniPic
The MiniPic (minipic.cn) in-house engine compresses and converts between PNG, JPEG, WebP, GIF, TIFF and AVIF (plus HEIC → JPEG and BMP → PNG on input), tuning each image to shrink files while keeping quality visually lossless. The web app works with no sign-up — just upload your image and pick the target output format to do it in one step. Compress / convert now, or see the public quality benchmark.
Frequently asked questions
What is the difference between PNG and WebP, and which should I use?
PNG is lossless and has the broadest compatibility, making it ideal for icons, screenshots and images that need transparency. WebP has a higher compression ratio with great quality and also supports transparency, making it the go-to for web photos and illustrations. Use PNG when you need maximum compatibility or true lossless; use WebP when you want smaller files.
Is AVIF worth using?
AVIF offers the highest compression ratio, looks sharper at the same file size and supports transparency, making it great for cover images and large visuals where size matters most. The downside is weaker support in older browsers, so when targeting a broad audience it is best to also provide a WebP or PNG fallback.
How do I convert PNG to WebP or AVIF?
Upload your image to the MiniPic web app and pick the target output format to compress and convert in one step. Our in-house engine shrinks the file while keeping quality visually lossless. The web app works with no sign-up, and the quality benchmark is published openly.
Compress in one step, with no visible quality loss
Once you've picked a format, compress and convert with the MiniPic in-house engine.