How to fix photo upload problems

Wedding photos go in the Photo gallery section of the editor. You can select several at once.

For a large album, add them in small batches of a few. That makes it obvious which photo is the problem, rather than one big upload stalling as a whole.

Each image file can be up to 10MB. Photos from a recent phone or a professional camera can exceed that.

If one photo will not upload, check that specific file's size first. Over 10MB and it needs to be made smaller before it will go.

iPhone photos are usually in HEIC format. ChungDoi converts them to JPEG on upload, so you do not have to change the format yourself.

If advice elsewhere tells you to convert HEIC to JPEG first, ignore it. Just pick the original photos straight from your library.

Switch to stable Wi-Fi rather than mobile data. Wedding photos are large, and a weak signal is the most common reason an upload stalls partway.

Do not close the tab or lock the screen while it is uploading. On a phone, switching to another app can pause the transfer.

The browser built into Zalo or Messenger handles file picking differently from a normal browser, and sometimes cannot open your photo library at all.

Open chungdoi.com in Safari, Chrome or your phone's default browser and upload there. That resolves most of the odd cases.