Every image file on the web is a tradeoff between quality, file size, and compatibility. Choosing PNG when you need JPG can triple your file sizes. Choosing JPG for screenshots produces blurry text. And WebP gives you the best of both — but not everyone has switched yet. This guide cuts through the confusion.
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Quick Comparison
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| Transparency | ✗ No | ✓ Yes (alpha) | ✓ Yes (alpha) |
| Best file size for photos | Good | Large | Best (25–34% smaller than JPG) |
| Best file size for graphics | Poor (artifacts) | Good | Best |
| Browser support | 100% universal | 100% universal | 95%+ (all modern browsers) |
| Typical use case | Photos, email, print | Screenshots, logos, editing | Web pages, all-purpose modern |
| Animation support | ✗ | ✗ (use APNG) | ✓ |
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JPG (JPEG)
JPEG (Joint Photographic Experts Group) is the oldest and most universally supported format. It uses lossy compression — it discards some image data to achieve smaller file sizes.
Use JPG when:
- Sharing photos via email or messaging
- Uploading to social media
- Printing photographs
- Maximum browser/device compatibility is required
- File size matters and some quality loss is acceptable
Avoid JPG for:
- Screenshots with text (compression causes blurring)
- Images that need transparency
- Logos and icons
- Images you plan to edit repeatedly (quality degrades on re-save)
Quality setting guide: 85 = web standard (good balance). 90–95 = high quality (print/archive). 95+ = near-lossless. Below 70 = visible artifacts.
PNG
PNG (Portable Network Graphics) uses lossless compression — every pixel is stored exactly as-is. It also supports full alpha channel transparency, making it the standard for logos, UI elements, and screenshots.
Use PNG when:
- The image has text, lines, or sharp edges
- Transparency is required (logos, overlays)
- Taking screenshots
- Saving source files for future editing
- UI elements, icons, illustrations
Avoid PNG for:
- Large photographs (files are 3–5× larger than JPG)
- Email attachments (size matters)
- Sites where Core Web Vitals performance is critical
WebP
WebP was developed by Google and released in 2010. It supports both lossy and lossless compression, alpha transparency, and animation. WebP files are 25–34% smaller than JPG at equivalent quality and roughly 26% smaller than PNG for lossless images.
Use WebP when:
- Optimizing a website for speed (Core Web Vitals)
- Serving images to modern browsers
- You need transparency AND small file size
- Replacing both JPG and PNG on web pages
Avoid WebP for:
- Email attachments (many email clients don't support WebP)
- Printing (printers require JPG/PNG/TIFF)
- Older software that doesn't recognize WebP
Browser support (2026): WebP is supported in Chrome, Firefox, Safari 14+, Edge, Opera — covering 95%+ of global web traffic. It is not supported in IE11 (which has <1% market share).
Decision Guide
Frequently Asked Questions
Does PNG to JPG conversion lose quality?
Yes — JPG is lossy. Converting PNG to JPG at 90 quality produces excellent photos, but for images with sharp text, flat colors, or transparency, the JPG artifacts will be noticeable. Use our image converter to test different quality settings and compare file sizes.
Is WebP replacing JPG and PNG?
For web use, yes — WebP is now the recommended format on modern websites (Google PageSpeed Insights specifically suggests converting to WebP). However, JPG and PNG remain dominant for email, print, and non-web contexts where WebP isn't supported.
Why is my PNG larger than the original JPG?
PNG stores every pixel losslessly, which produces larger files for photographic content. A 2MB JPG photo might become a 10MB PNG after conversion — this is normal. PNG compression is optimized for graphics and screenshots, not photographs. If file size is important, use JPG or WebP for photos.