Is WebP supported in every browser?

All current browsers support it — Chrome, Edge, Firefox and Safari have for years — so a website can serve WebP without a fallback for the overwhelming majority of visitors. Older mail clients, print software and a few embedded viewers do not, which is why the original JPG is still worth keeping.

Does WebP support transparency?

Yes, in both lossy and lossless modes. That is one of the main reasons to convert: a transparent PNG cannot become a JPG without filling the background with white, but it can become a lossless WebP with the alpha channel intact and a smaller file than the PNG.

Do I need to keep the original PNG or JPG?

Yes. Conversion is one-way — WebP discards data when it compresses, and converting back only re-encodes the loss that already happened. Keep the source file for future edits, resizing or printing, and treat the WebP as the copy you publish.

Is my image uploaded when I convert it?

No. Decoding and encoding happen in your browser tab. The file is read from your machine and the result is offered as a download — nothing is transmitted to a server.

Convert JPG to WebP — Get 35% Smaller Image Files

WebP is a modern image format developed by Google that produces 25-35% smaller files than JPG at the same visual quality. Converting your JPG images to WebP is one of the simplest ways to speed up page loading without changing anything else on your site.

Why WebP Matters for Speed

Google uses page speed as a ranking factor. Images typically account for 50-70% of a web page's total weight. Switching from JPG to WebP can reduce image payload by a third. For a page with 10 images averaging 200KB each in JPG, converting to WebP saves roughly 600-700KB total — significant on mobile connections.

Browser Support

WebP is supported by Chrome (since 2014), Firefox (since 2019), Edge (since 2018), and Safari (since version 14, 2020). As of 2026, over 97% of global browsers support WebP. If you need to support very old browsers, serve both JPG and WebP using the <picture> HTML element.

What I Tested

I converted 5 JPG photos to WebP using the JPG to WebP tool.

• Landscape photo (4000×3000, 3.8MB JPG) → 1.1MB WebP (71% smaller). Side-by-side comparison at 100% zoom: no visible difference.

• Portrait photo (3000×4000, 4.2MB JPG) → 1.3MB WebP (69% smaller). Skin tones and hair detail preserved accurately.

• Screenshot (1920×1080, 890KB JPG) → 310KB WebP (65% smaller). Text remained sharp. UI elements crisp.

• Product photo on white background (2000×2000, 1.2MB JPG) → 280KB WebP (77% smaller). White background clean, product edges sharp.

• Low-light photo (4032×3024, 5.1MB JPG) → 1.8MB WebP (65% smaller). Noise pattern preserved identically.

Step-by-Step

(1) Open JPG to WebP. (2) Click 'Select JPG Files' (up to 10). (3) Click 'Convert'. (4) Download converted WebP files individually or as a ZIP.

Limitation

WebP does not support progressive rendering (interlacing) like JPG. This means WebP images load all at once rather than gradually appearing from low to high resolution. On very slow connections, this can feel slightly slower to render, even though the total download time is shorter.

Common Mistake

Converting already-compressed JPG images at a lower quality setting. If your JPG was saved at 80% quality, converting it to WebP at 70% quality applies a second round of lossy compression. Always convert from the highest-quality source available, or use the original PNG before any compression.

How It Compares

Squoosh (by Google) converts JPG to WebP in-browser but only one file at a time with no batch support. CloudConvert handles batch conversion but requires uploading files to their servers and limits free accounts to 10 conversions per day. Our tool supports batch conversion of up to 10 files entirely in your browser with no upload.

Privacy: Conversion happens entirely in your browser. Your JPG images are never uploaded to any server.

Next Step: To serve both formats for maximum compatibility, use the WebP to JPG tool to create JPG fallbacks, then use the HTML <picture> element to let browsers choose the best format automatically.

How Much Smaller Is WebP, Really?

Typical savings are 25 to 35 percent against a JPG of the same visual quality, and considerably more against a PNG, which is lossless and therefore pays for every pixel. The format compresses smarter: it predicts parts of the image from their neighbours and only stores the difference, then applies a familiar JPEG-style encoder to what remains.

The gain varies with content. Photographs with fine detail and grain save the least; flat graphics, screenshots and images with large uniform areas save the most. A photo that drops from 400 KB to 300 KB is normal, a UI screenshot dropping from 300 KB to 60 KB is common. Convert a sample first and measure rather than assuming the headline percentage.

Serving WebP Without Breaking Anything

The safe pattern is to offer both files and let the browser choose. The picture element takes a WebP source and a JPG fallback, so modern browsers get the smaller file and anything that cannot read WebP gets one it understands — no broken images, no support emails.

Name the files clearly as well: hero.webp alongside hero.jpg keeps the relationship obvious in a directory listing, and it means a non-web use — a document, an email signature, a print job — can be pointed at the file that will actually open there. If the image is going into an email or to a printer, send the JPG or PNG; if it is going on a page, send the WebP.