Is ERF to WebP conversion free?

Yes, completely free with no account required. Guests convert up to 10 files a day on webp.now.

How do I convert ERF to WebP?

Upload your ERF file, pick any options you need, and click Convert. The WebP file downloads in seconds — no software, plugin or codec to install.

How much bigger or smaller will the WebP file be?

Smaller, usually dramatically so — ERF files are 20-100 MB per frame — hundreds of times a WebP. The exact saving depends on the image, but photographic content at quality 80-85 commonly lands at a third of the original.

Will transparency survive the conversion?

WebP supports transparency, but ERF has none to carry over, so the result is fully opaque. You can add an alpha channel afterwards in an image editor.

Can I convert several ERF files at once?

Yes. Batch upload is supported on this tool — queue up to 50 files and the finished WebP files come back as a single zip.

Does webp.now keep a copy of my ERF file?

No. The upload is held only long enough to run the conversion. It is deleted once you download the result, and automatically within 24 hours if you abandon the page. Nothing is copied to backups, archives, analytics or any training dataset.