Kubernetes Secret Decoder
Parse and decode Kubernetes Secret manifests. Decode all base64-encoded data fields at once.
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Decode Secret
Decoded Result
| Key | Encoded Value | Decoded Value |
|---|
What is a Kubernetes Secret?
A Kubernetes Secret is an object that stores sensitive data such as passwords, OAuth tokens, SSH keys, and TLS certificates. Secrets are defined in YAML or JSON manifests and store their data as base64-encoded strings in the data field.
Secrets can be mounted as files or exposed as environment variables in pods. Common types include Opaque (generic), kubernetes.io/dockerconfigjson (Docker registry), kubernetes.io/tls (TLS certificates), and kubernetes.io/basic-auth (Basic authentication).
Secret YAML Structure
- apiVersion: v1
- kind: Secret
- type: Opaque (or other types)
- data: Contains key-value pairs where values are base64-encoded
- stringData: (Optional) Contains plaintext key-value pairs (not base64)
How to Use This Kubernetes Secret Decoder
- Paste a Kubernetes Secret YAML or JSON manifest into the input area.
- Click Decode to parse the secret and decode all base64-encoded values in the data field.
- The results table shows each key with its encoded (base64) and decoded (plaintext) values.
- stringData values are shown as-is since they are already in plaintext.
Common Use Cases
- Debugging deployments — Decode Secret manifests to verify correct values are being deployed to your cluster.
- Cluster migration — Decode existing Secrets for inspection before migrating them to a new cluster.
- CI/CD pipelines — Verify Secret contents in pipeline logs without manual base64 decoding.
- Security audits — Inspect Secret contents during security reviews to ensure sensitive data is properly managed.
- Learning & training — Understand how Kubernetes Secrets encode data and practice creating Secret manifests.
Frequently Asked Questions
Is base64 encoding secure for Kubernetes Secrets?
No. Base64 is encoding, not encryption. Anyone with access to the Secret manifest can decode the values instantly. Kubernetes mitigates this with encryption at rest (etcd encryption) and RBAC (access control). Always use additional security measures for truly sensitive data.
What is the difference between data and stringData?
data contains base64-encoded values and is used when reading Secrets. stringData allows you to specify plaintext values when creating Secrets — Kubernetes automatically encodes them to base64 when storing. This tool decodes both fields but only shows the difference in the source.
What Secret types does this tool support?
This tool supports all Secret types including Opaque, kubernetes.io/tls, kubernetes.io/dockerconfigjson, kubernetes.io/basic-auth, and kubernetes.io/ssh-auth. It decodes all entries in the data field regardless of the secret type.
Can I encode data with this tool?
This tool is focused on decoding existing Secrets. If you need to create new Secrets by encoding plaintext values, use a separate base64 encoder or the Base64 Encoder / Decoder tool.
Is this tool safe for sensitive data?
Yes. All decoding happens entirely in your browser using JavaScript. No data is sent to any server. Your Secret contents never leave your device.
