JSON Anonymizer & PII Redactor

About the JSON Anonymizer and PII Redactor

In modern development, sharing API responses and JSON payloads is an everyday occurrence. However, pasting a raw database export into ChatGPT, a Slack channel, or a public GitHub issue is incredibly dangerous if the data contains PII (Personally Identifiable Information). Exposing emails, passwords, credit card numbers, or API keys can lead to massive security breaches. We built the JSON Anonymizer to solve this problem by instantly scanning and wiping sensitive data from your payloads before you share them.

Our tool uses a highly intelligent, recursive scanning engine. The moment you paste your JSON, it travels through every single nested object and array, looking for keys that represent sensitive information. We grouped these keys into three toggleable categories: Personal Info (like emails and IP addresses), Credentials (like passwords and API tokens), and Financial Info (like credit cards and SSNs). When the engine finds a match, it safely overwrites the value with a secure string like [REDACTED], preserving the exact structure of your JSON file while destroying the sensitive data.

Because every company uses different naming conventions, we also included a Custom Keys feature. If your database uses proprietary keys like internal_user_hash, you can simply type that into the box, and the tool will redact it automatically. Most importantly, this entire scanning and redaction process runs 100% locally in your web browser. Your private JSON payloads never touch an external server, guaranteeing absolute security and compliance.

Key Features

• Smart PII Detection: Automatically finds and redacts common sensitive keys (e.g., email, password, cc_num, api_key).
• Deep Recursive Scanning: Traverses massively nested JSON objects and arrays to ensure no sensitive data is missed.
• Custom Key Targeting: Allows you to define your own comma-separated list of proprietary keys to redact.
• Multiple Masking Styles: Choose how you want the data replaced (e.g., use [REDACTED], asterisks ********, or wipe it to an empty string).
• 100% Private & Secure: Powered entirely by client-side JavaScript. Your sensitive payloads are never uploaded or saved to our servers.
• Structure Preservation: Safely overwrites the *values* without deleting the keys, ensuring your API payloads do not break when testing.

How to Redact Sensitive JSON Data

• Paste your raw JSON payload into the "Raw JSON Data" box on the left, or upload a file directly from your computer.
• Use the toggle switches to select which categories of data you want to automatically redact (Personal, Credentials, or Financial).
• If your payload contains specific internal keys you want to hide, type them into the "Custom Keys" input box (separated by commas).
• Select your preferred replacement style (e.g., `[REDACTED]`).
• The tool will instantly scan the document and output the safe, anonymized JSON in the right-side box.
• Click "Copy" or "Download" to safely share your payload!

Frequently Asked Questions

What is a JSON Anonymizer?

A JSON Anonymizer is a security tool that scans data payloads and automatically overwrites or removes sensitive information (like passwords, emails, and financial data). It allows developers to safely share JSON logs or API responses without risking a data breach or violating privacy laws.

Is it safe to paste real customer data into this tool?

Yes, absolutely. We engineered this tool to operate 100% on the client-side within your web browser. Your raw JSON data never leaves your computer, and we do not use backend servers to process your files. Your sensitive information remains strictly on your own device.

Does this tool scan deeply nested objects and arrays?

Yes. The anonymization engine uses deep recursive scanning. It doesn't matter if your sensitive email key is buried ten levels deep inside an array of objects; the tool will find it and redact the value perfectly.

What happens if a custom key matches an entire object?

If you specify a custom key (for example, user_data), and the value of that key is a massive nested object, the tool will overwrite the entire object with your chosen redaction style (like [REDACTED]). This guarantees that no nested data accidentally leaks.

Why shouldn't I just delete the keys entirely?

Deleting keys from a JSON payload can break the schema. If you are sharing the payload with a coworker to debug an application, the app might crash if it expects the email key to exist. By overwriting the value to [REDACTED] instead of deleting the key, you keep the data structure intact while securing the actual information.