Pre-signed URL Inspector
// S3 · SigV4 · X-Amz-Expires · who signed it · when it really expires
A pre-signed URL works for anyone who has it until it expires, so treat it like a password. This page reads it locally and never opens it.
Findings
What the URL grants
Signature parameters
Redacted copy for a ticket
The signature, session token and access key ID are replaced with REDACTED, so the link no longer works but still shows the bucket, object, region, dates and lifetime.