Other PDF Issues

Fix 'Out of Memory' Error When Signing PDFs in Adobe

Olivia MillerOlivia Miller Oct 23, 2026 869 views

Question details

The user experiences an 'Out of memory' error message when attempting to add a signature to a PDF document using Adobe software.

Fix 'Out of Memory' Error When Signing PDFs in Adobe
Product
Adobe Reader DC / Adobe Acrobat
Device & OS
not provided
Scenario
Adding a digital or electronic signature to a PDF document.
Observed behavior
The Adobe Signature Tool fails to apply the signature and displays an 'Out of memory' error prompt.
Before you start

Before troubleshooting, ensure your device has sufficient RAM available and try closing any unnecessary background applications to rule out actual system memory shortages.

Solution 1Recommended

Update Adobe Reader DC to the Latest Version

Software bugs causing memory errors are often patched in newer updates. Updating your application ensures optimal performance.

Adobe frequently releases patches to fix known memory leaks and bugs within their signature tool. Installing the latest update is the most effective way to resolve this issue.

1
Open Adobe Reader

Launch the Adobe Reader DC desktop application on your computer.

2
Check for updates

Navigate to the top menu bar, click on 'Help', and select 'Check for Updates'.

3
Install updates

Follow the on-screen prompts to download and install any pending application updates, then restart the program.

Update Adobe Reader DC to the Latest Version
Restart Required: Be sure to restart Adobe Reader DC after the update completes to ensure the patch is fully applied before trying to sign a document again.
Fast and Lightweight PDF Editor

Sign PDF Documents Easily Without Memory Errors Using WPS Office

If Adobe continues to display memory errors, switch to WPS Office. It provides a lightweight, highly efficient PDF editor that allows you to easily add electronic signatures to your documents without heavy system resource demands.

  1. 1. Open PDF in WPS: Launch WPS Office and open your PDF document.
  2. 2. Access Signature Tool: Navigate to the 'Fill & Sign' tab on the top ribbon and select 'Sign'.
  3. 3. Create Signature: Draw, type, or import an image of your personalized signature.
  4. 4. Apply and Save: Place the signature on the document, resize it as needed, and save your file.
Sign PDFs quickly with exceptionally low memory consumption.Fully compatible with Adobe PDF formats and signature standards.Lightweight installation with an intuitive, user-friendly interface.
microsoft office alternative - wps office

Frequently Asked Questions

Why does Adobe say 'Out of memory' when I have plenty of RAM?

This error can occur due to a software glitch, a corrupted temporary file, or an issue with the specific PDF's structural coding rather than an actual lack of system RAM. Updating the application usually resolves these software-specific bugs.

Can a corrupted PDF file cause signature memory errors?

Yes, if a PDF file is corrupted or contains extremely complex vector graphics and layers, the signature tool may struggle to process the file, triggering an 'Out of memory' alert. Testing a different file can help isolate this issue.

How do I reduce the memory usage of Adobe Reader?

You can reduce memory usage by closing unused document tabs within Adobe Reader, disabling third-party plugins in the application preferences, and ensuring you are running the latest, most optimized version of the software.