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Mask Sensitive JSON Fields Online

Mask sensitive JSON fields in your browser by matching key names such as password, token, or phone. Nested objects and arrays are walked recursively, and values are replaced with mask characters so you can share debug payloads more safely.

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Use cases

Redact secrets before sharing an API response with a teammate
Prepare demo or documentation sample payloads
Clean phone numbers and tokens before posting logs publicly

How to use

Paste the JSON to process
Enter the field names to mask
Copy the masked result

Example input and output

Original JSON

{"pass":"123"}

Masked result

{"pass":"********"}

FAQ

Are nested fields with the same name masked too?

Yes. The tool walks the full JSON tree, so matching keys in nested objects and arrays are masked.

Is the original JSON uploaded?

No. Masking runs locally in your browser and the original JSON is not sent to a server.

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