100% Private — Your images never leave your device
Convert JPG to WebP
This tool converts a JPEG image to WebP at its original dimensions, typically producing a smaller file at the same visual quality. Processing happens in your browser — your image is never uploaded anywhere.
- Free
- Unlimited
- No Uploads
- Works Offline
Why use a JPG to WebP converter?
WebP is typically 25–35% smaller than an equivalent JPEG, which means faster page loads without a visible quality difference. It's supported by all current browsers.
No Uploads
Super Fast
Unlimited
Always Free
Works Everywhere
How it works
Step 1
Upload
Pick a JPEG file — or any PNG or WebP. It stays on your device.
Step 2
Convert
The tool re-encodes it as WebP at the same dimensions.
Step 3
Download
Save the WebP straight from your browser.
Frequently asked questions
- Does this upload my image to a server?
- No. The conversion happens locally in your browser using your device's own processing power. The image never leaves your computer or phone.
- What formats can I upload?
- You can upload JPEG, PNG, or WebP files — the output is always WebP.
- How much smaller will the WebP be?
- It depends on the image, but WebP is typically 25–35% smaller than an equivalent JPEG at the same visual quality.
- Does this resize my image?
- No. This tool only changes the file format — width and height stay exactly as they were in the original.
- Is PublishFit free to use?
- Yes. There's no account, no subscription, and no limit on how many images you can convert — PublishFit is free to use, on this tool and every other one on the site.
- Can I use this on my phone?
- Yes. PublishFit works in any modern mobile browser — tap to upload a photo from your camera roll or files, and the WebP downloads straight to your phone.
Where this helps
- Shrinking photo galleries for faster page loads
- Preparing product photos for e-commerce
- Reducing blog post image weight
- Modernizing an older image library
Your files never leave your device
Every tool on this site processes images entirely in your browser. Nothing is uploaded, nothing is stored on our servers.Read our full privacy commitment.