How much smaller is WebP compared to JPG?

On average, lossy WebP files are 25% to 35% smaller than comparable JPEGs at equivalent SSIM (Structural Similarity Index) quality scores. For photographic imagery on websites, this translates to noticeably faster load times and improved Core Web Vitals.

What quality setting should I use when converting JPG to WebP?

A quality setting of 80 to 85 provides the optimal balance between aggressive compression and pristine visual fidelity for web photos. For images with text or crisp UI elements, consider quality 88 to 92.

Will WebP images display on iPhones and Safari?

Yes. Apple added full native WebP support to Safari with iOS 14 and macOS Big Sur in 2020. All modern Apple devices, Windows PCs, and Android phones render WebP effortlessly.

Convert JPG to WebP: Cut Image File Size by 30% Online Free

If you run a website, blog, or online store, JPEG files are quietly slowing down your page load times. WebP is Google's modern image format designed specifically to replace JPEG and PNG on the web, offering superior compression algorithms that produce dramatically smaller files at identical visual quality.

Converting your existing JPEG catalog to WebP is one of the highest-leverage speed optimizations you can make.

Why WebP outperforms JPEG

JPEG was created in 1992 using Discrete Cosine Transform (DCT) algorithms. WebP, developed by Google, uses predictive coding derived from the VP8 video codec. Instead of treating each 8x8 block of pixels independently like JPEG does, WebP predicts what neighboring pixel blocks look like based on surrounding data, only storing the subtle difference.

The result is a consistent 25% to 35% reduction in file size compared to a JPEG of identical visual fidelity. A 1.2 MB hero photograph shrinks down to roughly 750 KB as WebP with no perceptible change to visitors.

Browser support in 2026

In the early days of WebP, developers had to maintain complex fallback scripts for older browsers. Today, WebP is supported natively across over 97% of all web browsers globally, including Chrome, Safari (macOS and iOS), Firefox, Edge, and Android browsers. There is virtually no compatibility penalty for serving WebP today.

How to convert JPG to WebP in batch

Open the Image Converter.
Drop your JPEG images or entire folders into the converter.
Set the target format to WebP.
Adjust the quality slider (80 to 85 is the golden standard for photographic web assets).
Download the converted WebP batch directly to your machine.

Everything executes locally in your browser tab. A batch of 100 high-resolution photos processes in seconds with zero upload bandwidth required.

Convert JPG to WebP Free

Slash your web image sizes by up to 35% without losing quality. Fast, private, and unlimited client-side conversion.

Convert JPG to WebP Free