View CRL files in your browser
The list a CA publishes of the certificates it took back before they expired. See every one, right here, with when and why. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your certificate opens as a card: who it's for, who issued it, its dates and its chain.
- Its chain • Checked against the roots Filepeek carries
- Valid from and until • The days it has
- Every name it covers • Domains and emails
- SHA-256 and SHA-1 fingerprints • Copy with a click
About CRL
A CA revokes a certificate when its key is stolen, its owner leaves or it was issued by mistake, and lists it in a CRL until it would have expired. X.509 brought CRLs in 1988, and a CA publishes its list at an address each of its certificates names.
A CRL holds the serial number of each revoked certificate with the date and often the reason, the CA's name, when the list was made and when the next is due, all signed by the CA.
Filepeek lists the revoked certificates with their serial numbers, dates and reasons, then who keeps the list and when the next one is due, and checks its signature when Filepeek carries the CA that signed it.
Certificate revocation list
.crl
Format
- MIME type
- application/pkix-crl
- Made by
- The ITU-T
- Released
- 1988
Inside the file
- Holds
- Revoked serial numbers
- Each with
- A date, often a reason
- Signed by
- The CA
- Standard
- X.509
Opens in every browser
Browsers download CRL files. Filepeek lists what one revokes in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I see what a CRL revokes?
Drop it on this page or press Peek a CRL. Each revoked certificate shows with its serial number, when it was revoked and why.
Is my certificate on the list?
Find its serial number, which a certificate's card shows. A list that names it means the CA has revoked it.
Does Filepeek download CRLs?
No. It reads only the list you drop, and asks nothing of a CA.
Is my file uploaded?
No. The file opens inside your browser and never leaves your device.