Clinic guide · 2026
Portal says JPG only — PNG, WEBP, or HEIC rejected
“JPG only” means the validator accepts JPEG files and blocks other formats. Export or convert to a .jpg / .jpeg file before uploading — PNG, WEBP, HEIC, and PDF are common rejects.
What “JPG only” is checking
Upload fields often use a simple allow-list:
- Allowed:
image/jpeg, extensions.jpg/.jpeg - Blocked: HEIC, PNG, WEBP, GIF, BMP, TIFF, PDF, DOC
Some portals accept PNG as well. Trust the form text, not a general web article.
Formats that commonly fail
| You upload | Typical result |
|---|---|
| HEIC from iPhone | Invalid / unsupported type |
| PNG with transparency | Rejected or flattened badly later |
| WEBP from modern exports | Unsupported on older servers |
| PDF of a scan | Wrong document type for a “photo” field |
| Screenshot PNG | Size + format double failure |
How to produce a safe JPG
- Open the original in a converter or editor.
- Export JPEG / JPG.
- If the portal also has a KB limit, compress after export.
- Do not wrap the photo in a PDF unless the field explicitly asks for PDF.
Progressive vs baseline JPEG
A few older systems dislike progressive JPEGs. If a JPG still fails with a vague error:
- Re-export as a baseline JPEG
- Strip odd color profiles if your tool offers “sRGB”
- Avoid embedding huge metadata if the tool allows a slim export
Still stuck after a valid JPG? The next suspects are file size and dimensions, not the word “JPG” itself.
FAQ
Is JPEG different from JPG?
No meaningful difference for portals. .jpg and .jpeg are the same format family.
Why did my PNG fail if it is an image?
Many validators only whitelist JPEG. Transparent PNGs and large PNGs are especially common rejects.
Can I rename .png to .jpg?
No. Renaming does not convert the file. The MIME type and bytes still look like PNG and will fail stricter checks.