Email attachments — photos, documents, PDFs — are something almost everyone deals with regularly. But they do not always open without a fight. Here is a plain-English guide to what to do when an attachment refuses to open, or when you cannot figure out how to send one.
Why an Attachment Will Not Open
The most common reason an attachment will not open is that your device does not have the right app to handle that type of file. Every file has a format — indicated by the letters after the dot in the filename, like .pdf, .docx, or .xlsx. Your device needs a matching app to open each type.
- .pdf — needs a PDF reader. iPhones and Android phones open these automatically. On Windows, try opening it in Edge or Chrome. On a Mac, double-click it and it opens in Preview.
- .docx or .doc — Microsoft Word documents. If you do not have Word installed, you can open these in Google Docs (free) or LibreOffice (also free).
- .xlsx — Excel spreadsheets. Same situation — Google Sheets opens these for free if you do not have Excel.
- .heic — a photo format iPhones use. Windows computers sometimes struggle with these. If you cannot open a .heic photo, you can convert it to a .jpg using a free online converter.
The Attachment Is There but Will Not Download
If you can see the attachment in the email but clicking it does nothing, try these steps:
- Check your internet connection — attachments need to download before they open.
- Try opening the email in a web browser instead of an app. Go to Gmail, Outlook.com, or your provider’s website and try from there.
- If the attachment is very large (over 25MB is common), the sender may need to use a file-sharing service like Google Drive or WeTransfer instead of attaching it directly.
How to Send an Attachment
On most email apps and websites, composing a new email shows a paperclip icon somewhere near the text area. Clicking or tapping this opens your files so you can choose what to attach. On a phone, you may also see an option to add a photo directly from your camera roll.
If the file is too big to attach — most email services cap attachments at 25MB — you will usually get a warning. The solution is to share the file via Google Drive, Dropbox, or OneDrive and paste the link into your email instead.
Is It Safe to Open?
Most attachments from people you know are fine, but be cautious about attachments in unexpected emails. The riskiest file types are .exe, .zip, and .js — if you receive one of these unexpectedly, do not open it. PDFs and image files (.jpg, .png) from known contacts are generally safe.
Attachment problems are almost always solvable with the right app or a quick format conversion. The key is knowing what type of file you are dealing with — once you know that, finding the right tool to open it is straightforward.