Image Format Comparison

JPEG vs WebP: Should You Convert Your JPEGs to WebP?

JPEG (JPG) is the most-used image format in history — your phone camera, digital camera, scanner, and every website has used JPEGs for decades. WebP is Google's next-generation replacement for JPEG: same visual quality at substantially smaller file sizes, with additional features like transparency and lossless mode. As of 2024, WebP is the recommended format for web photo delivery, but JPEG remains essential for non-web contexts.

JPEGvsWebP

Quick Verdict

Use JPEG when…

Use JPEG for email, printing, universal compatibility, and any context where WebP isn't supported. JPEG is universally readable by every application ever made.

Use WebP when…

Use WebP for web delivery — it's 25–35% smaller than JPEG at equivalent quality and is now supported by all major browsers. For web photos, WebP should be your default.

JPEG vs WebP: Feature Comparison

Feature	JPEG	WebP
Standardised	1992 — over 30 years deployed	2010 — now at 97%+ browser support
File size at equivalent quality	Baseline reference	25–35% smaller (lossy mode) at equivalent visual quality
Transparency	Not supported	Supported — full alpha channel
Lossless mode	Not supported	Supported — lossless WebP for pixel-perfect images
Browser support	Universal	Chrome, Firefox, Edge, Safari 14+ (2020)
Email support	Universal	Poor — most email clients don't display WebP
Software support	Universal — every application ever made	Growing — modern apps support it, legacy software often doesn't

When JPEG wins

✓Standardised: 1992 — over 30 years deployed
✓File size at equivalent quality: Baseline reference
✓Transparency: Not supported

When WebP wins

✓Standardised: 2010 — now at 97%+ browser support
✓File size at equivalent quality: 25–35% smaller (lossy mode) at equivalent visual quality
✓Transparency: Supported — full alpha channel

Frequently asked questions

Should I convert all my JPEGs to WebP for my website?

Yes — for web delivery. Serving WebP instead of JPEG reduces image file sizes by 25–35%, which directly improves page load times and Google Core Web Vitals scores (specifically LCP). All major browsers support WebP. Use the HTML <picture> element with WebP as the primary source and JPEG as the fallback for legacy support.

Is WebP replacing JPEG?

On the web: effectively yes. Most modern web frameworks and CDNs automatically serve WebP to browsers that support it. JPEG remains the dominant format for email, print, and offline use. AVIF (released 2020) may eventually replace WebP as the web standard — it achieves even better compression — but WebP is the current practical recommendation.

Does converting JPEG to WebP lose quality?

At quality 80+: no visible quality loss to normal observers. WebP achieves smaller file sizes through more efficient compression algorithms, not by discarding more data at the same quality setting. A JPEG at quality 85 and a WebP at quality 85 look essentially identical, but the WebP file is 25–35% smaller.