Attachment Issues

How to View a Full-Size JPEG Instead of a Thumbnail in Outlook

Adam Davis Oct 10, 2026 869 views

Question details

The user needs to view a JPEG image at its original full size rather than as a compressed or resized thumbnail within an Outlook email message.

How to View a Full-Size JPEG Instead of a Thumbnail in Outlook

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Opening incoming emails containing JPEG image attachments or inline pictures.
Observed behavior: Outlook displays the incoming JPEG image as a small thumbnail, either because automatic picture downloads are blocked or the image was manually resized by the sender.

Before you start

Ensure that the email is from a trusted sender before choosing to download any external pictures, as images can sometimes contain tracking pixels or malicious links.

Solution 1Recommended

Download Pictures from the InfoBar

Use this primary method when Outlook blocks automatic image downloads for privacy and security reasons, resulting in thumbnail placeholders.

By default, Outlook may prevent automatic picture downloads in HTML email messages to protect your privacy. Downloading the blocked pictures will usually reveal the full-size JPEG.

Locate the InfoBar

Open the email message containing the thumbnail image and look for the yellow message InfoBar at the top of the email.

Download Pictures

Click on the InfoBar and select 'Download Pictures' from the drop-down menu to view the images in their full size.

Alternative Context Menu Method

If you only want to view a specific image, right-click the thumbnail placeholder and choose 'Download', 'Open', or 'View Full Image' from the context menu.

Tip: You can add trusted contacts to your Safe Senders list to automatically download pictures from them in future emails.

Solution 2

Reset Picture Size and Formatting

Use this method if the image was successfully downloaded but still appears small because the sender manually scaled it down after inserting it into the email body.

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Frequently Asked Questions

Why does Outlook block picture downloads by default?

Outlook prevents automatic image downloads to protect your privacy and security. Downloading an image from an unknown server can notify the sender that your email address is active, which is often used by spammers.

How can I automatically download pictures from a specific sender?

Right-click the message InfoBar at the top of the email and select 'Add Sender to Safe Senders List'. Outlook will automatically load full-size images from that email address in the future.

Can I change the default setting to always download pictures in Outlook?

Yes. Navigate to File > Options > Trust Center > Trust Center Settings > Automatic Download. Uncheck the box that says 'Don't download pictures automatically in HTML e-mail messages or RSS items', though this is not recommended for security reasons.

Outlook & Email Problems