How do I fix error Red X?

The error Red X on Microsoft Outlook is typically caused by incompatible file formats. Converting your image to a standard format like JPG or PNG usually resolves this issue instantly.

Is it safe to convert my files online?

Yes, if you use a client-side converter like LocalImageConverter. Your files are processed entirely within your browser and are never uploaded to any server, ensuring 100% privacy.

Back to Converter

Error Code: Red X

Fix Outlook Red X Image Error

Your email signature showing a Red X instead of a logo? It's a format hosting issue.

Instant Solution

The most reliable way to fix format incompatibility on Microsoft Outlook is to standardise (convert) the file.

BAD FILE.webp

FIXED FILE.jpg

Fix My File Now

100% Free • Private & Secure • Works Offline

Outlook often blocks external images or complex formats in signatures for security.

The Fix

Embed the image properly. First, make sure it is a standard JPG or PNG (no WebP!). Outlook 2019+ struggles with modern web formats.

Need more help?

LocalImageConverter supports over 50 formats. Whatever file you are struggling with, we can probably fix it.

View all supported formats