At a glance
| Provider | Ruby on Rails |
|---|---|
| Category | Strictly necessary |
| Consent required? | No |
| Typical domain | Varies (first-party) |
Do you need consent for _session_id?
No. _session_id is a strictly necessary cookie, exempt from consent under Article 5(3) of the ePrivacy Directive and Law 506/2004. You may use it without the visitor's prior agreement.
This is general guidance, not legal advice — always verify with a lawyer.
How FewCookies handles this cookie
FewCookies recognises _session_id from our database of 1,300+ known cookies and classifies it automatically as "Strictly necessary". The free check tells you whether this cookie is detected on your site and whether your banner handles it correctly — an instant, surface-level check, no account needed.
Frequently asked questions
Do you need consent for the _session_id cookie?
No. _session_id is a strictly necessary cookie, exempt from consent under Article 5(3) of the ePrivacy Directive and Law 506/2004. You may use it without the visitor's prior agreement.
What does the _session_id cookie do?
Session cookie generated by the Ruby on Rails framework.
Who sets the _session_id cookie?
The _session_id cookie is associated with Ruby on Rails and is classified as strictly necessary.