formatter.input (JSON)
Loading Editor...
transformer.masker.fields (comma sep)
transformer.masker.keyRegex
transformer.masker.valueRegex
transformer.masker.valueType
transformer.masker.style
transformer.masker.maskedOutput
Loading Editor...

JSON Masker Online – Mask Sensitive Data

Redact passwords, tokens, emails, and other sensitive fields from JSON before sharing logs, tickets, or screenshots — all processed locally in your browser.

Mask JSON Before You Share It

Debugging often means pasting real API responses into a ticket, Slack message, or bug report. This JSON masking tool lets you redact chosen fields — with asterisks, a custom mask string, or partial masking — while keeping the JSON structure intact for debugging.

Useful for:

  • redact sensitive fields in json
  • hide api keys and tokens in logs
  • mask pii before sharing json
  • sanitize json for bug reports

Why Mask JSON Data?

  • Share debugging logs without leaking credentials
  • Sanitize sample payloads for documentation
  • Redact PII before attaching data to a ticket
  • Keep JSON structure readable while hiding values

Features

  • Mask specific fields or all values
  • Asterisk, custom, or partial masking modes
  • Preserves JSON structure and nesting
  • In-browser processing — nothing uploaded
  • Free to use, no signup

Common Use Cases

Redacting API responses for support tickets
Hiding tokens before posting logs publicly
Preparing sample data for documentation

How to Use

  1. Paste your JSON into the editor
  2. Choose which fields to mask, or mask all values
  3. Pick a masking style and copy the redacted output

Related Tools

JSON FormatterJSON ValidatorMock Data Generator

FAQ

Is my JSON data uploaded anywhere?

No. Masking happens entirely in your browser — your data is never sent to a server.

Can I mask only specific fields?

Yes. Select which keys to mask, or use the mask-all option to redact every value.

What masking styles are available?

Full asterisk masking, a custom replacement string, or partial masking that keeps the first and last few characters visible.

Mask Your JSON Now

Redact sensitive fields before sharing your data anywhere.

All Tools

Formatters

Validators

Transformers

Converters

Comparators