WebP vs PNG vs JPEG: Which Image Format Should You Use in 2026?
Three image formats dominate the web in 2026: JPEG, PNG, and WebP. Choosing the wrong one means either unnecessarily large files or visible quality loss. Here's exactly when to use each one.
The Quick Answer
- Photos and gradients on websites: WebP
- Logos, icons, UI elements with transparency: PNG
- Legacy compatibility (older email clients, some CMS): JPEG
- Anything else on the web: WebP
JPEG — The Reliable Veteran
JPEG (Joint Photographic Experts Group, 1992) uses lossy compression that works by discarding colour information the human eye is less sensitive to. It's the most universally supported format in existence — every image viewer, email client, and browser supports it.
Use JPEG when: you need guaranteed compatibility, are sending photos via email to people with unknown software, or are exporting images for print.
Don't use JPEG for: images with sharp edges, text, or flat colours — JPEG introduces visible blocky artefacts (called "compression artefacts") around high-contrast edges.
PNG — The Lossless Standard
PNG (Portable Network Graphics, 1996) is lossless — every pixel is preserved exactly. It also supports full transparency (alpha channel), making it essential for logos, icons, and UI elements that need to sit on coloured backgrounds.
Use PNG when: you need transparency, the image has text or sharp geometric shapes, or quality must be pixel-perfect (e.g., screenshots, UI mockups).
Don't use PNG for: photographs — PNG files are 3–5× larger than equivalent JPEG/WebP files for photographic content.
WebP — The Modern Choice
WebP (Google, 2010) combines the best of both worlds: it supports both lossy and lossless modes, supports transparency, and produces files 25–35% smaller than equivalent JPEG or PNG. As of 2024, browser support is effectively universal (97%+ of global users).
Use WebP when: you're putting images on a website and want the best performance. It works for both photographs (lossy mode) and logos/UI (lossless mode).
Don't use WebP for: email attachments (many email clients still don't render WebP), or when sending to users who might open the file in Windows Photo Viewer (older Windows versions don't support WebP natively).
File Size Comparison (Typical Photo)
| Format | File Size | Quality |
|---|---|---|
| Original TIFF | 18 MB | Lossless |
| PNG | 6.2 MB | Lossless |
| JPEG (85% quality) | 1.4 MB | Excellent |
| WebP (85% quality) | 0.9 MB | Excellent |
| JPEG (70% quality) | 0.8 MB | Good |
| WebP (70% quality) | 0.5 MB | Good |
How to Convert Between Formats — Free
Use the Image Converter to convert any image between PNG, JPEG, and WebP entirely in your browser. Upload the image, choose the output format, adjust quality, and download. No uploads to servers.
Frequently Asked Questions
Does converting JPEG to WebP improve quality?
No — you can't recover quality lost during JPEG compression by converting to another format. Quality is set at the point of first lossy compression. Convert from the highest-quality source you have.
Is WebP supported everywhere?
In browsers: yes (97%+ globally as of 2025). In email clients: no — stick to JPEG/PNG for email. In Windows: Windows 10 and 11 support WebP natively; older versions may not.
Should I convert my existing JPEG website images to WebP?
Yes, if you have the originals. A 25–35% size reduction improves page load times which directly affects Core Web Vitals and SEO rankings.
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