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YAML Anonymizer & Data Masker

Sanitize YAML config or data before sharing it. Swap real values for realistic fake data, mask them with ***, or replace only the keys you choose. Everything happens locally in your browser, so the original data never leaves your device. Note: anonymizing re-serializes YAML, so comments and anchors are not preserved.

Processed locally in your browser
Scope
Inputyaml
Loading editor…
YAML○ Not checked0 lines0 chars0 B

How to use the YAML anonymizer

  1. Paste or upload the YAML you want to sanitize.
  2. Choose a scope: replace All values, or only specific keys (type key names like email, name, ssn).
  3. Pick a style: Realistic fake data, Redact (***), or Type placeholder.
  4. Press Anonymize, then copy or download the safe-to-share result. Your original data never leaves the browser.

Example: Masking secrets in a config file

Input
db:
  host: prod-db.corp.internal
  password: s3cr3t
  user: admin
Output
db:
  host: lorem
  password: "***REDACTED***"
  user: user1

Secret-like keys (password, token, apiKey…) are always fully redacted. Comments and anchors are not preserved, since anonymizing re-serializes the document.

Frequently asked questions

Is my YAML sent anywhere to be anonymized?
No. It is parsed and rewritten entirely in your browser. Your original values never leave your device.
Are comments and anchors preserved?
No. Anonymizing re-serializes YAML from its data model, so comments, anchors, and aliases are dropped — the tool warns you about this. Use the YAML formatter if you need lossless formatting.
Can I target only certain keys?
Yes. Use the “Only these keys” scope and list key names such as password, email, or token. Matching is case-insensitive and works at any depth.
What replacement styles are available?
Realistic fake data (key-aware), Redact (mask with ***), and Type placeholder. Secret-like keys are always fully redacted.