Trace Decode

Decode & validate trace headers

A focused tool for parsing W3C trace context, B3, Datadog, and Jaeger headers with clear validation and conversions.

Decoded locally in your browser. No server requests.

No data retention, storage, or analytics.

Field-by-field explanations based on published specs.

Paste trace headers

Supports W3C traceparent, B3 (single/multi), Jaeger uber-trace-id, and Datadog headers.

Normalize hex to lowercase

Detected format: Unknown / unsupported formatPaste headers to detect the trace format.

Decoded locally in your browser. No data leaves your machine.

Spec-accurate parsing with explicit validation for flags, sampling, and ID lengths.