'%3e%3cpath%20d='M8%200C12.4183%200%2016%203.58172%2016%208C16%2012.4183%2012.4183%2016%208%2016C3.58172%2016%200%2012.4183%200%208C0%203.58172%203.58172%200%208%200ZM11.6162%204.38379C11.2257%203.99337%2010.5927%203.99338%2010.2021%204.38379L8%206.58594L5.79785%204.38379C5.40732%203.99334%204.77429%203.99329%204.38379%204.38379C3.99331%204.77429%203.99335%205.40733%204.38379%205.79785L6.58594%208L4.38379%2010.2021C3.99348%2010.5927%203.99341%2011.2257%204.38379%2011.6162C4.77426%2012.0066%205.40734%2012.0065%205.79785%2011.6162L8%209.41406L10.2021%2011.6162C10.5927%2012.0066%2011.2257%2012.0067%2011.6162%2011.6162C12.0067%2011.2257%2012.0066%2010.5927%2011.6162%2010.2021L9.41406%208L11.6162%205.79785C12.0066%205.40735%2012.0066%204.77429%2011.6162%204.38379Z'%20fill='%23080E17'%20fill-opacity='0.46'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_3761_713'%3e%3crect%20width='16'%20height='16'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
How to Fix HTTP Error 400 When Inserting Pictures in Microsoft Word
Question details
The user needs to fix an HTTP 400 error that prevents them from inserting pictures into a document.
- Product
- Microsoft Word
- Device & OS
- not provided
- Scenario
- Inserting a picture or adding a watermark to a Word document.
- Observed behavior
- Microsoft Word displays an HTTP Error 400 stating that the request header size is too long, causing the picture insertion to fail.
Ensure you have saved your current document, as fixing this error requires modifying Microsoft Office privacy settings and completely restarting the application.
Disable Connected Experiences in Trust Center
Turning off Microsoft Office's connected experiences prevents the application from sending overly large request headers to cloud servers, effectively resolving the HTTP 400 error.
This error is often linked to Microsoft Office's cloud-backed features. Disabling connected experiences stops Word from attempting to reach the server for online picture processing, allowing standard operations to resume.
Launch Microsoft Word, click on the 'File' tab in the top-left corner, and select 'Options' from the bottom of the left-hand navigation pane.
In the Word Options window, select 'Trust Center' from the left menu, then click on the 'Trust Center Settings' button on the right side.
In the Trust Center dialog, choose 'Privacy Options' from the left pane and then click on the 'Privacy Settings' button.
Scroll down the privacy settings menu, locate the 'Connected Experiences' section, and uncheck the box labeled 'Turn on connected experiences'. Click 'OK' to apply.
Close Microsoft Word completely and open it again for the changes to take effect. Try inserting a picture to confirm the error is resolved.
Avoid Picture Insertion Errors with WPS Office
If Microsoft Word continues to display HTTP Error 400 when handling images, consider switching to WPS Office. As a free, lightweight, and highly stable alternative, WPS Office allows you to insert pictures, watermarks, and media seamlessly without relying on complex cloud-connected experiences that cause header size limits.
Frequently Asked Questions
What does 'request header size is too long' mean in Word?
This error means the data packet Word sent to Microsoft's online servers exceeded the server's allowed size limit. It is typically triggered by cloud-based features like 'Connected Experiences' trying to process online pictures or watermarks.
Can I still insert pictures if I disable connected experiences?
Yes, you can still insert pictures saved locally on your computer's hard drive. However, features that pull images directly from the internet via Bing or online stock libraries will be unavailable until the feature is re-enabled.
Is there a permanent fix for HTTP Error 400 in Microsoft Word?
Currently, turning off connected experiences is the most reliable workaround. Microsoft frequently releases patches for Office, so ensure you regularly update Microsoft 365 through 'File' > 'Account' > 'Update Options' to receive official bug fixes.
