Cookie Library · Essential
JSESSIONID
The Java server equivalent of a session ID. Clearing it usually signs you out.
- Owner
- The site itself
- Matches
- The exact name
JSESSIONID - Needed to Work
- Yes. Removing it can sign you out or break the site.
- Confidence
- Verified
- Source
- https://jakarta.ee/specifications/servlet/
- Last Reviewed
- 2026-09-13
Which Sites
Any site. The name is specific enough to identify this cookie wherever it appears.