Choosing the wrong image format can cost you significantly in page load speed, storage costs, and visual quality. JPG, PNG, and WebP each have distinct strengths — and knowing when to use each one is one of the most impactful skills for anyone who manages a website.
This guide breaks down every difference that matters, with a clear recommendation for every use case.
Bottom Line: Use WebP for almost everything on the web in 2025. It is smaller than JPG, supports transparency like PNG, and all major browsers have supported it since 2020.
JPG (JPEG) — The Web Standard Since 1992
JPG is the most widely used image format in the world. It uses lossy compression, meaning it permanently discards some image data to achieve smaller file sizes. The human eye generally cannot detect this loss at quality settings of 70% or above.
When to use JPG
- Photographs and realistic images with complex gradients
- When maximum compatibility is required (very old browsers or devices)
- Social media thumbnails where platforms will re-compress anyway
Limitations of JPG
- No transparency support — backgrounds are always solid
- Quality degrades each time you save (avoid re-saving JPGs multiple times)
- Not ideal for images with sharp edges, text, or flat colors
PNG — Lossless Quality for Graphics
PNG uses lossless compression, preserving every pixel exactly. This makes it the right choice for graphics, logos, and any image where precision matters more than file size.
When to use PNG
- Logos, icons, and brand assets that need sharp edges
- Screenshots and UI graphics with text
- Images that require a transparent background
- Anything that will be edited further (keep the original in PNG)
Limitations of PNG
- Much larger file sizes than JPG or WebP for photographs
- Not ideal for large hero images or background photos
WebP — The Modern Standard
WebP was developed by Google and released in 2010. It has been widely supported by all major browsers since 2020. It supports both lossy and lossless compression, plus transparency — making it a direct upgrade over both JPG and PNG in most scenarios.
WebP advantages
- 25–35% smaller than JPG at equivalent visual quality
- Supports transparency like PNG but with smaller file sizes
- Supports animation as a replacement for GIF (up to 64% smaller)
- Both lossy and lossless modes available
When to use WebP
- All website images — product photos, blog images, hero backgrounds
- Logos and icons when SVG is not available
- Animated images (replacing GIF)
Side by Side Comparison
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Compression type | Lossy | Lossless | Both |
| Transparency | No | Yes | Yes |
| Animation | No | No | Yes |
| File size (photo) | Medium | Large | Small |
| File size (graphic) | Poor | Medium | Small |
| Browser support | Universal | Universal | 97%+ (all modern) |
| Best for | Photos, legacy | Logos, screenshots | Everything web |
What About SVG, AVIF, and HEIC?
SVG — Best for logos and icons
SVG is a vector format, meaning it scales perfectly at any size with zero quality loss. Use SVG for logos, icons, and illustrations whenever possible. The file size is tiny and it looks perfect on every screen.
AVIF — The next generation
AVIF is newer than WebP and can achieve even better compression, but browser support is still not universal in 2025. Stick with WebP for now unless you are building for a very specific modern audience.
HEIC — iPhone photos
HEIC is Apple's format for iPhone photos. It offers good compression but is not supported by most web browsers. Always convert HEIC to WebP or JPG before using on a website. TinyPNG Now converts HEIC automatically.
Quick Format Decision Guide
| Image Type | Recommended Format |
|---|---|
| Website photograph or hero image | WebP |
| Product photo on e-commerce site | WebP |
| Logo or brand icon | SVG or WebP |
| Screenshot or UI graphic | WebP or PNG |
| Image with transparent background | WebP or PNG |
| Animated image | WebP |
| iPhone photo (HEIC) | Convert to WebP |
| Print document | PNG or TIFF |
Pro Tip: TinyPNG Now converts between all major formats for free — JPG, PNG, WebP, and HEIC — directly in your browser. No upload needed, no account required.