WebP vs JPEG — Which Format Should You Use?
WebP and JPEG are both lossy image formats designed for photographs and complex images. WebP is newer, smaller, and more capable — but JPEG is universal and understood by everything from email clients to printers to decade-old software. Choosing between them is not always obvious.
This guide compares WebP and JPEG across every dimension that matters: file size, quality, browser support, transparency, animation, and real-world use cases. By the end you will know exactly when to use each.
What Is JPEG?
JPEG (Joint Photographic Experts Group) has been the dominant photo format since 1992. It uses lossy DCT compression — it discards fine detail that the human eye is least sensitive to, producing small files from large photos. A typical 12-megapixel photo compresses from ~36 MB (raw) to ~3 MB as JPEG with no visible quality loss.
JPEG is supported by every device, browser, operating system, printer, email client, and image editor ever made. If universal compatibility is your priority, JPEG is unbeatable.
What Is WebP?
WebP was developed by Google in 2010 and released as an open standard. It uses a more advanced compression algorithm based on the VP8 video codec. WebP supports:
- Lossy compression — like JPEG, for photographs
- Lossless compression — like PNG, for graphics and screenshots
- Transparency (alpha channel) — something JPEG cannot do
- Animation — like GIF but at a fraction of the file size
In lossy mode at equivalent visual quality, WebP files are 25–35% smaller than JPEG. Google's own studies show WebP at quality 80 produces files 34% smaller than JPEG at quality 80.
WebP Newer
- 25–35% smaller than JPEG at same quality
- Supports transparency (alpha channel)
- Supports lossless + lossy + animation
- 97%+ browser support (Chrome, Firefox, Safari, Edge)
- Ideal for web — speeds up page load
- Not supported in some email clients or old software
JPEG Universal
- Universally supported — 100% compatibility
- Works in all email clients and printers
- Supported in every image editor ever made
- No transparency or animation support
- 25–35% larger files than WebP at same quality
- Best for sharing, printing, and archiving
WebP vs JPEG — Full Comparison Table
| Property | WebP | JPEG |
|---|---|---|
| File size (typical photo) | ~65 KB at quality 80 | ~95 KB at quality 80 |
| Compression type | Lossy + Lossless | Lossy only |
| Transparency (alpha) | Yes | No |
| Animation | Yes | No |
| Browser support | 97%+ (Chrome, Firefox, Safari, Edge) | 100% — every browser |
| Email client support | Limited (Gmail yes, Outlook no) | Universal |
| Printer / print shop | Some support | Universal |
| Image editor support | Most modern editors | All editors |
| Metadata (EXIF) | Yes | Yes (more tools) |
| Max colour depth | 10-bit | 8-bit |
| HDR support | Yes (lossy WebP) | No |
| Core Web Vitals benefit | Yes — Google recommends WebP | No specific benefit |
Browser Support for WebP
As of 2026, WebP is supported in all modern browsers:
- Chrome — supported since version 23 (2012)
- Firefox — supported since version 65 (2019)
- Safari — supported since version 14 (2020, macOS Big Sur / iOS 14)
- Edge — supported since version 18 (2018)
- Samsung Internet, Opera, UC Browser — all supported
Global browser support is above 97%. The remaining ~3% is primarily IE11 users (enterprise environments) and very old Safari on iOS 13 or earlier.
For almost every website, you can safely serve WebP to all visitors today. If you need a fallback for legacy browsers, use the HTML <picture> element:
<picture> <source srcset="photo.webp" type="image/webp"> <img src="photo.jpg" alt="Description"> </picture>
This serves WebP to browsers that support it and falls back to JPEG automatically. Modern build tools like Next.js, Nuxt, and Astro do this automatically.
When to Use WebP
When to Use JPEG
Real File Size Comparison
To make the size difference concrete, here is the same 4000×3000 pixel photograph saved at different quality levels in each format:
| Quality Setting | JPEG File Size | WebP File Size | Saving |
|---|---|---|---|
| High (90%) | 1.8 MB | 1.2 MB | ~33% smaller |
| Standard (80%) | 950 KB | 620 KB | ~35% smaller |
| Compressed (70%) | 580 KB | 390 KB | ~33% smaller |
| Aggressive (60%) | 380 KB | 255 KB | ~33% smaller |
On a page with 10 product images, switching from JPEG to WebP could save 3–4 MB of page weight — a meaningful improvement for page speed, especially on mobile.
Convert JPEG to WebP — Free, No Upload
Convert your photos to WebP instantly in your browser. Files never leave your device.
WebP and SEO — Does the Format Affect Rankings?
Yes, indirectly. Google does not rank pages based on image format directly, but image format affects page speed — and page speed is a ranking signal via Core Web Vitals.
Specifically, WebP affects:
- Largest Contentful Paint (LCP) — if your hero image loads faster as WebP, your LCP score improves. LCP is a direct Core Web Vitals metric.
- Total page weight — smaller images mean less bandwidth, which affects time-to-interactive on mobile.
- Google PageSpeed Insights — this tool actively flags JPEG images and recommends converting to WebP. Addressing this recommendation improves your score.
For an e-commerce or content-heavy site where images dominate page weight, converting to WebP can improve PageSpeed scores by 10–30 points depending on how many images are on the page.
WebP vs PNG vs AVIF — Where Does WebP Fit?
WebP sits between JPEG and AVIF in the modern image format hierarchy:
- JPEG — oldest, largest files, 100% compatible. Use when compatibility is required.
- WebP — 25–35% smaller than JPEG, 97% browser support, supports transparency. Use for most web images today.
- AVIF — 50% smaller than JPEG, even better quality, but ~90% browser support and slower encoding. Use for future-forward, performance-critical sites.
- PNG — lossless, transparency, large files. Use for logos, icons, and screenshots where pixel-perfect sharpness matters more than file size.
For most teams building websites in 2026, WebP is the practical sweet spot: dramatically better than JPEG, with broad enough browser support to serve without fallbacks on virtually all real-world traffic.