What JPG to URL means
A JPG file on your computer or phone has a local path. That path is not a link anyone else can open. JPG to URL, JPG to link, and JPEG to URL all mean the same step: upload the file and copy the HTTPS address the uploader returns.
The direct URL points at the uploaded image. A preview page is a separate address that shows file information and copy controls. Use the direct URL in an image field, an img src, or a Markdown image.
JPG and JPEG are the same image type
A file named photo.jpg and a file named photo.jpeg can both be JPEG data. The uploader accepts either extension. You do not need to rename the file before uploading, and the generated address does not have to end in .jpg. Copy the full URL the result shows.
JPEG is a common choice for photographs because it keeps file size down. It does not store a transparent background. If the image is a logo or screenshot that needs transparency, use a PNG and the PNG to URL page instead of converting it to JPG first.
JPG link formats
Each example uses a placeholder address. Replace it with the URL returned after your JPG finishes uploading.
Direct URL: https://example.com/photo.jpg
HTML: <img src="https://example.com/photo.jpg" alt="Example photo" />
Markdown: 
BBCode: [img]https://example.com/photo.jpg[/img]
Use the plain address when a field asks for an image URL. Use HTML on a webpage, Markdown in a README, and BBCode only on a forum that supports image tags.
Optional JPEG optimization
When optimization is enabled, a large JPEG may be resized or re-encoded, and image quality can drop. Turn optimization off when you need the original bytes, but the file must still fit the 20MB size limit and the 16-megapixel limit.
Optimization does not apply to PNG, GIF, or WebP. If you uploaded a JPG and the result looks softer than the original, upload again with optimization off, or export a smaller JPG yourself before uploading.
Where a JPG URL is useful
A JPG link is a practical way to share a photograph without sending the file as an attachment.
- Blog posts and documentation that accept an image URL or Markdown.
- Support forms that ask for a picture address.
- README files that should show a screenshot or photo.
- Forum posts, when the editor accepts a direct URL or BBCode.
Public JPG links and backups
A public JPG URL may be accessible to anyone who obtains the address. HTTPS protects the transfer. It does not add a password or an account around the file. Do not upload private photos, identity documents, or other confidential images.
Links are intended for ongoing sharing, but continued availability is not guaranteed. Keep the original JPG somewhere else if you still need the photo later.