Chrome saved a WebP and the form rejects it
You did not choose WebP. The site did, because Chrome said it accepts image/webp. The HR portal still lists JPEG. Convert the photo; the file may grow. That is the cost of compatibility. Files are deleted within 1 hour.
https://cdn.example.com/hero.jpg
Save ashero.webp
How you got a WebP
Right-click Save image as writes whatever bytes arrived. CDNs look at Chrome's Accept header, see image/webp, and send WebP even when the URL still ends in .jpg. File Explorer, Word, old upload fields, and a lot of government portals then refuse the file.
Animated WebP is not this page. Tinolia takes a photo, not an animation. If the download is an animated sticker, this page will reject it.
How to tell it is WebP
Look at the filename. If it ends in .webp, it is WebP, even if the page address still says .jpg. In Explorer, open Properties: the type often says WebP. A file you renamed to .jpg without converting is still WebP inside, and Word will still choke.
Chrome on Android does the same trick. Save image in the mobile browser, then try to attach it to a portal. The phone gallery may preview it; the upload field may not. Edge and Brave send image/webp too. Safari is less aggressive; Save as from Safari is more often the JPEG the URL promised. If you already have the WebP, convert it.
Convert to JPEG
Drop the WebP on WebP to JPG. If it had transparency, pick a fill; JPEG has no transparency. White is the usual page. The JPEG can be larger than the WebP. WebP is good at the same look in fewer bytes. You are paying for software stuck in 2012.
- Drop the .webp. Up to 10 files, 20 MB each.
- Pick a fill if the image had transparency. Download JPEG, or a ZIP of several. Delete when you have the files.
- If the portal also names a cap, run Compress JPG or Compress to 200 KB next.
When you need PNG instead
Need transparency: use WebP to PNG. Screenshots with sharp text also survive better as PNG than as JPEG. Forms that list JPG or JPEG only still want WebP to JPG.
A logo you grabbed from a site is often a WebP with transparency. Putting it on white is fine on a white page. Putting it on black looks like a sticker on night mode.
Chrome also saves AVIF now
Same story, newer codec. The site sent AVIF; Save as wrote .avif. Older Windows apps and the same portals refuse that too. AVIF to JPG writes a standard JPEG. HDR AVIF becomes 8-bit. Transparency needs a fill, same as WebP.
If you are collecting images for your own site, keep WebP or AVIF. Convert when someone else's software is the problem. JPG to WebP and PNG to WebP are the other direction. You cannot stop a site from sending WebP by hunting a Chrome flag most people will never find. Convert the file you have.
Questions
Why did Chrome save a .webp when the URL said .jpg?
The URL is a name. The bytes are whatever the server sent. Chrome advertised image/webp, so the CDN sent WebP.
Can I just rename the file to .jpg?
No. The inside is still WebP. Word and a lot of portals look at the bytes, not only the extension.
Why is the JPEG larger than the WebP?
WebP is good at the same look in fewer bytes. JPEG is the format the portal listed. You are paying for compatibility.
What about an animated WebP?
This page takes a photo. An animated sticker is rejected. Keep it as WebP, or use a tool that handles animation.
Chrome saved an .avif. Same fix?
Yes. Use AVIF to JPG. Transparency still needs a fill.
Do you keep the file?
Original and result are deleted within 1 hour. You can delete them from the download screen.