AWS SigV4 Playground

Build canonical requests, strings-to-sign, and signatures. No network calls — everything runs locally.

Mode

Method

Region

Service

x-amz-date

Request

URL

Headers (name: value per line)

Body

Credentials

Access Key ID

Secret Access Key

Session Token (optional)

Tip: For STS creds, include the session token; it is signed and must be present in the request.

Computed signature:

Canonical Request

Canonical Query

Signed Headers

Payload Hash

String To Sign

Credential Scope

Signing Key (hex)

Signature (hex)

Authorization Header

Suggested request headers

Compute to see suggestions.