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WebP vs JPG: photo format tradeoffs
JPG remains broadly compatible for photos. WebP can provide smaller web images at similar visual quality and also supports transparency.
What this guide explains
JPG remains broadly compatible for photos. WebP can provide smaller web images at similar visual quality and also supports transparency.
Technical scope
This guide describes browser-based file workflows, format tradeoffs, and ConvertUnlimited processing boundaries for supported tools.
Quality vs Size
WebP lossy images are intended to be 25% to 34% smaller than comparable JPEG images at equivalent SSIM quality index. This means faster websites without sacrificing visual appeal.
Comparison Table
| Feature | WebP | JPG |
|---|---|---|
| Compression | Lossy & Lossless | Lossy only |
| Transparency | Supported | Not supported |
| File Size | Smaller (up to 34% less at similar quality) | Larger |
| Best for | Web delivery, photos, mixed transparency use | Universal photo compatibility, older software and devices |
Pros and Cons
WEBP
- Often smaller file size
- Supports both lossy and lossless modes
- Strong browser support
- Not ideal for high-end print
- Older software might lack support
JPG
- Universal compatibility
- Simple, mature format
- Fast to decode
- No transparency support
- Larger files at comparable quality
- Lossy only, no lossless mode
When to Use Each
Use WebP for modern web delivery when smaller files are useful and the publishing workflow supports the format. Use JPG when maximum compatibility with older software, devices, or print workflows matters more than file size.
Related guides
WebP vs PNG: format differences and use cases · What is WebP?
FAQ
Should I replace all JPGs with WebP?
Not automatically. Use WebP for modern web delivery when supported, and keep JPG fallbacks when compatibility matters.
Is WebP lossless?
WebP supports both modes. Lossless WebP preserves pixel data exactly, similar to PNG. Lossy WebP, the default for photos, behaves more like JPEG, trading some quality for smaller files.
Is WebP smaller than JPEG?
Usually. WebP lossy images are typically 25% to 34% smaller than comparable JPEG images at a similar visual quality level, though exact savings depend on the source image.
Action
Convert between JPG and WebP in the browser: JPG to WebP, WebP to JPG, PNG to WebP, or WebP to PNG.