NLTK download SSL: Certificate verify failed - Stack Overflow
When you try to download NLTK data using nltk.download() , you might encounter the error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate . This typically happens because Python cannot find or verify the root certificates required to establish a secure connection to the NLTK data servers . nltk download unable to get local issuer certificate
Double-click the file named Install Certificates.command . Alternatively, you can run it from the terminal: /Applications/Python\ 3.x/Install\ Certificates.command Use code with caution. (Replace 3.x with your actual version, such as 3.12 ) . 2. Disable SSL Verification (Quick Workaround) NLTK download SSL: Certificate verify failed - Stack
Locate the folder for your specific Python version (e.g., Python 3.12 ). Alternatively, you can run it from the terminal:
Here are the most effective ways to fix this issue, categorized by operating system and approach. 1. Fix for macOS (The Most Common Cause)