WebP vs JPEG vs PNG: Which Image Format Should You Use?
A clear breakdown of every major web image format — when to use each one, and how to convert between them instantly.
The Short Answer
- JPEG — photographs and complex images where small file size matters more than transparency
- PNG — logos, screenshots, and images that need a transparent background
- WebP — the modern default for almost everything on the web
- AVIF — next-generation format with best compression; use where browser support allows
- GIF — simple animations only; consider video formats for complex animations
JPEG: The Reliable Workhorse
JPEG (Joint Photographic Experts Group) has been the dominant format for photographs since the 1990s. Its lossy compression is specifically tuned for photographic content — smooth colour gradients, skin tones, natural scenes.
Strengths:
- Universal browser and OS support
- Excellent compression for photos (75–85% quality is hard to distinguish from 100%)
- Small file sizes compared to PNG for photographic content
Weaknesses:
- No transparency support
- Compression artefacts visible at low quality settings
- Not ideal for text, line art, or flat colour areas
Best for: Blog post images, product photos, hero banners, background images.
PNG: Lossless and Transparent
PNG (Portable Network Graphics) uses lossless compression and supports full alpha-channel transparency. This makes it the go-to format for anything that needs to sit cleanly on any background colour.
Strengths:
- Lossless — pixel-perfect quality every time
- Full transparency support (unlike JPEG)
- Sharp edges on text and line art
Weaknesses:
- Much larger file sizes than JPEG for photographic content
- No animation support (use APNG or WebP for that)
Best for: Logos, icons, UI screenshots, any image with a transparent background.
WebP: The Modern Standard
Developed by Google and released in 2010, WebP supports both lossy and lossless compression and includes transparency support. As of 2024, browser support is effectively universal (96%+ globally).
WebP consistently achieves 25–35% smaller file sizes than JPEG at equivalent visual quality.
Strengths:
- Smaller files than JPEG for photos, smaller than PNG for graphics
- Supports transparency (unlike JPEG)
- Supports animation (like GIF, but far more efficient)
- Universal browser support
Weaknesses:
- Older native apps and some CMS platforms don't display WebP outside the browser
- Not ideal if you need to share files with non-technical users expecting JPG/PNG
Best for: Almost everything on a modern website.
AVIF: The New Challenger
AVIF is based on the AV1 video codec and offers extraordinary compression — typically 40–50% smaller than JPEG at equivalent quality. It also supports wide colour gamut and HDR.
Strengths:
- Best compression ratio of any major format
- Wide colour gamut and HDR support
- Good transparency support
Weaknesses:
- Slower to encode than WebP (matters for real-time processing)
- Browser support is still maturing (Chrome, Firefox, Safari 16+; no IE)
- Older Android versions don't support it
Best for: Sites targeting modern browsers where maximum compression matters.
Format Comparison at a Glance
| Format | Compression | Transparency | Animation | Browser support |
|---|---|---|---|---|
| JPEG | Lossy | No | No | Universal |
| PNG | Lossless | Yes | No* | Universal |
| WebP | Both | Yes | Yes | 96%+ |
| AVIF | Both | Yes | Yes | 90%+ |
| GIF | Lossless | 1-bit only | Yes | Universal |
*APNG supports animation but is rarely used.
How to Convert Between Formats
Use the Convert tool to switch any image between JPEG, PNG, WebP, AVIF, and GIF in seconds:
- Upload your image to the Convert page.
- Select the target format from the dropdown.
- Adjust quality if needed (for lossy formats).
- Download the converted file.
All processing happens server-side with professional-grade conversion, so colour accuracy and metadata handling are reliable.
Practical Recommendations for 2025
For a new website: Use WebP as your primary format. It offers the best combination of compression, quality, browser support, and transparency.
For maximum compression: Try AVIF — run a visual comparison and check your analytics for browser versions before committing.
For email newsletters: Stick to JPEG or PNG. Email clients lag far behind browsers in format support.
For social media: Each platform re-encodes your image anyway, so export the highest quality JPEG your size limit allows.