The JSON Data Masking Tool one-click masks sensitive information in JSON, such as phone numbers, emails, ID numbers, and passwords. In development debugging, logging, and data sharing scenarios, hiding sensitive data is essential — this tool helps you quickly and safely complete the masking process.
• 8 preset sensitive field types: phone, email, ID card, password, bank card, IP, address, name
• 3 masking modes: partial mask, full replacement, field removal
• Custom field name matching for any field masking
• Recursive processing of nested JSON and arrays
• Masking statistics: field count, mask rate
1. Paste or type JSON data into the input box
2. Select sensitive field types and masking mode
3. Optionally add custom field names (comma-separated)
4. Click "Apply Masking" to see results, then copy or download
• Development Debugging: Hide sensitive data in logs or debug output
• Data Sharing: Protect user privacy when sharing API response examples
• Test Data: Generate masked test datasets
• Documentation: Use masked data examples in technical docs
Data Masking is a critical data security measure. Regulations like GDPR and privacy laws require protection of personal sensitive information. Common masking strategies include: static masking (replacing original data), dynamic masking (real-time masking on query), and format-preserving encryption (maintaining data format). This tool implements static masking with obfuscation.
8 preset sensitive field types: phone, email, ID card, password, bank card, IP address, address, and name. You can also add custom field names for masking.
Three masking modes: partial masking (e.g., 138****1234), full replacement (e.g., [REDACTED]), and field removal. Phone numbers keep first 3 and last 4 digits, emails keep first letter and domain.
No. All masking happens locally in your browser. JSON data is never uploaded to any server. This ensures sensitive data never leaks.
Yes. You can customize field name matching rules, masking mode, and replacement characters. You can also add custom sensitive field rules.
Yes. The tool recursively traverses all levels of JSON objects, including nested objects and array elements, ensuring all sensitive fields are masked.
No. Masking is a one-way operation — original data cannot be recovered after replacement. This is a security feature. Always backup original data before masking.