DeveloperKit

YAML to Base64 Encoder

Encode YAML as Base64 or base64url instantly. Free, private, and 100% in your browser.

Input YAML

Base64 Output

Base64 output will appear here.

Encode YAML to Base64 Online

Kubernetes Secrets, Helm values, and CI/CD pipelines often need configuration as a single Base64 string. This encoder converts your YAML exactly as written, including comments and indentation, into standard Base64 or URL-safe base64url.

Features

  • Validates first

    Your YAML is checked before encoding, with the exact line and column of any error. By default it is encoded exactly as typed, including comments.

  • Kubernetes ready

    Produce values for the data field of Kubernetes Secrets and ConfigMaps.

  • Full UTF-8 support

    Non-ASCII characters are encoded correctly as UTF-8, unlike the browser's btoa().

  • CI/CD variables

    Store multi-line YAML safely in a single-line CI variable or environment variable.

  • base64url and MIME

    Use the URL-safe alphabet, or wrap lines at 76 characters.

  • Private by design

    Encoding runs entirely in your browser. Your secrets are never uploaded.

YAML to Base64 Example

YAML input
database:
  host: db.internal
  user: app
  password: s3cret
Base64 output
ZGF0YWJhc2U6CiAgaG9zdDogZGIuaW50ZXJuYWwKICB1c2VyOiBhcHAKICBwYXNzd29yZDogczNjcmV0

How to Encode YAML to Base64

  1. Paste your YAML into the input editor, or upload a .yaml or .yml file.
  2. Enable URL-safe or line wrapping if you need them.
  3. Copy the Base64 output or download it as a text file.

Frequently Asked Questions

How do I create a Kubernetes Secret value?

Values in the data section of a Kubernetes Secret must be Base64-encoded. Paste the value or file content, copy the Base64 output, and use it in the Secret manifest. Alternatively, use the stringData field, which accepts plain text.

Is the YAML validated?

Yes. Your YAML is checked as you type, and errors such as bad indentation, tabs, or duplicate keys are shown with their line and column. With Encode YAML set to As typed, the text is then encoded byte for byte, including comments and formatting.

Is Base64 a safe way to store secrets?

No. Base64 is an encoding, not encryption, and anyone can decode it. Kubernetes Secrets should be protected with access control and encryption at rest.

Is my YAML uploaded anywhere?

No. Encoding runs entirely in your browser. Your YAML never leaves your device.

Related Tools

  • Base64 to YAML

    Decode Base64 strings, such as Kubernetes Secret values, back into readable YAML.

  • YAML Formatter

    Format and validate YAML with exact line and column errors. Keeps comments, anchors, and block scalars.

  • JSON to YAML

    Convert JSON to clean, readable YAML for Kubernetes, Docker Compose, CI pipelines, and config files.

  • XML to YAML

    Convert XML documents and configs into clean, readable YAML.