image tool
JPG to WebP
Re-encode a JPEG as WebP, which usually produces a smaller file at the same visible quality. Capability is checked before any work starts, so you never download a file with the wrong format.
Add files
Drop JPEG images here, or choose files. Everything stays on this device.
Waiting for files
Accepted input
- JPEG images, up to 10 at a time
Limits
- Up to 20 MB per image and 10 images per batch.
- Up to 40 megapixels per image, checked before the pixels are allocated.
- Browsers without WebP encoding are told so instead of being given a mislabelled file.
Local processing
- Files are read in your browser and are never uploaded to a server.
- Nothing is stored after you close or reload the page.
How to use JPG to WebP
- Add one or more JPEG images.
- Choose a quality between 1 and 100.
- Press Convert to WebP and compare the reported size with the original.
What it does
- Checks WebP support first and explains what to do when the browser has none.
- Keeps alpha-capable output, so it is also the right choice for screenshots with transparency.
- Confirms the encoded format by reading the WebP header back.
Limits and things to know
- WebP support is checked in your browser; very old browsers are refused with a clear message.
- Lossy WebP still throws away detail, so converting twice is worse than converting once.
- Some very old desktop software cannot open WebP even though your browser can produce it.
Example
Cutting a hero image from 320 KB to 120 KB
Convert a 320 KB JPEG at quality 80. WebP usually lands well below the original at the same setting, and the tool prints both byte counts so the claim is checkable.
Frequently asked questions
What if my browser cannot make WebP?
The run stops with a message naming the missing capability. Nothing is downloaded, and no file is renamed to pretend it converted.
Is WebP always smaller than JPEG?
No. It usually is at similar quality, but tiny images and images with sharp text can come out larger. The tool reports the real sizes either way.
Does the conversion keep transparency?
JPEG has no transparency to keep, but the WebP output supports alpha, so the file is fine to use as a layered format later.
Runs entirely in your browser on ap98.com. Files are never uploaded.