JPG vs PNG vs WebP: Which Image Format Should You Use?
Choosing the right image format can make a file ten times smaller or ten times bigger without any visible difference. Here is a clear, practical comparison of the three formats you will use most, and a simple rule for when to use each.
The short answer
- Photos → JPG (or WebP on websites)
- Logos, icons, screenshots and graphics with text → PNG (or WebP on websites)
- Anything on a website → WebP, if your platform supports it
Comparison table
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| File size (photos) | Small | Very large | Smallest |
| Transparency | No | Yes | Yes |
| Animation | No | No (APNG is rare) | Yes |
| Browser support | Universal | Universal | All modern browsers |
| Software support | Universal | Universal | Good, but some older apps lack it |
| Best for | Photos, print, email | Logos, UI, text | Websites |
JPG (JPEG)
JPG has been the standard photo format since 1992. It uses lossy compression tuned to human vision: it discards fine colour detail that we barely notice, which makes photos dramatically smaller. You control the trade-off with a quality setting. Around 75–85% looks identical to the original for most photos.
Weaknesses: no transparency, and sharp edges or text can get fuzzy “halos” at low quality. Re-saving a JPG repeatedly loses a little more detail each time.
PNG
PNG is lossless: every pixel is stored exactly. That makes it ideal for logos, icons, diagrams and screenshots, where sharp edges and flat colours matter, and it supports full transparency. The downside is size: a photo saved as PNG is often 3–10 times larger than the same photo as JPG.
Rule of thumb: if it came from a camera, it probably should not be a PNG. Convert it with PNG to JPG.
WebP
WebP, created by Google, supports both lossy and lossless compression, plus transparency and animation. Lossy WebP photos are typically 25–35% smaller than JPG at the same visual quality, and lossless WebP graphics are often 25% smaller than PNG. Chrome, Safari, Firefox and Edge all support it, and WordPress accepts WebP uploads natively.
Weaknesses: some older desktop programs, printing services and upload forms still do not accept WebP. For those, convert back with WebP to JPG or WebP to PNG.
What about AVIF, GIF and SVG?
- AVIF: even smaller than WebP in many cases and supported by modern browsers, but encoding is slower and tool support is still catching up.
- GIF: an old format limited to 256 colours. Use it only for simple animations, and prefer WebP or short videos where possible.
- SVG: a vector format for logos and icons. It stays perfectly sharp at any size and is often tiny. If you have your logo as SVG, use it.
Which format is best for SEO?
Search engines do not rank formats directly, but they do reward fast pages. Using WebP (or well-compressed JPG) for photos and correctly sized images improves Largest Contentful Paint, a Core Web Vital. Google’s PageSpeed Insights even suggests “serve images in next-gen formats”. The practical recipe:
- Resize images to their display size with the image resizer.
- Convert photos to WebP with JPG to WebP, and graphics with PNG to WebP.
- Compress with the image compressor if they are still large.
Quick decision guide
- Uploading to a website? WebP.
- Emailing or printing a photo? JPG.
- Need a transparent background? PNG, or WebP for the web.
- Editing an image many times? Keep a PNG master and export JPG or WebP at the end.
- Form only accepts JPG? Convert and compress to the required size.
