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Log Redactor

Batch redact sensitive data from logs using configurable rules and multiple strategies

Redaction Strategies:

  • full - Replace entire match with replacement string
  • mask - Replace each character with mask character
  • keepFirstN - Keep first N characters, mask rest (N specified in replacement)
  • keepLastN - Keep last N characters, mask rest (N specified in replacement)
  • keepFirstLastN - Keep first N and last N, mask middle (N specified in replacement)
  • hash - Replace with SHA-256 hash of original value
  • partial - Show format but replace content (e.g., j***@email.com)

Custom Rules Format:

# Format: field_name|pattern|strategy|replacement
email|[\w.-]+@[\w.-]+|mask|[EMAIL]
phone|\d{3}-\d{3}-\d{4}|keepLast4|***-***-XXXX
ssn|\d{3}-\d{2}-\d{4}|keepLast4|XXX-XX-XXXX
apiKey|Bearer [\w.-]+|replace|[REDACTED]
ip|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|mask|X.X.X.X

Compliance Presets:

  • GDPR - Email, phone, IP, SSN, passport
  • HIPAA - Email, phone, SSN, MRN, diagnosis
  • PCI DSS - Card numbers, CVV, expiry, PIN

Key Facts

Category
Data Processing
Input Types
textarea, select, checkbox
Output Type
json
Sample Coverage
4
API Ready
Yes

Overview

The Log Redactor is a utility tool that batch redacts sensitive data from log files using configurable rules and multiple redaction strategies. It helps protect privacy and ensure compliance with regulations like GDPR, HIPAA, and PCI DSS by automatically masking or replacing personal information.

When to Use

  • •When sharing logs with external parties to prevent exposure of sensitive data.
  • •Before archiving logs to comply with data retention and privacy policies.
  • •During security audits or compliance checks to anonymize personal information.

How It Works

  • •Paste or input your log content into the designated text area.
  • •Select a compliance preset (e.g., GDPR, HIPAA, PCI DSS) or define custom redaction rules.
  • •Choose redaction strategies for each data type, such as masking or partial replacement.
  • •Run the tool to generate redacted logs and optionally a compliance report.

Use Cases

Redacting email addresses and IP addresses from web server logs for GDPR compliance.
Masking credit card numbers in e-commerce transaction logs to meet PCI DSS requirements.
Anonymizing patient identifiers in healthcare application logs for HIPAA compliance.

Examples

1. GDPR Compliance for Web Server Logs

DevOps Engineer
Background
Web server logs contain user IP addresses and email addresses from visitor interactions.
Problem
Need to share logs with an analytics team without exposing personal data protected under GDPR.
How to Use
Paste the log content, select the GDPR preset, and run the tool with dry run enabled to preview.
Outcome
IP addresses are masked as X.X.X.X and emails are replaced with [EMAIL], ensuring GDPR compliance.

2. HIPAA Compliance for Healthcare Logs

Background
Application logs include patient medical record numbers and social security numbers.
Problem
Must redact sensitive health information before logs are reviewed by external auditors for HIPAA compliance.
How to Use
Upload the log file, choose the HIPAA preset, and enable the generate report option.
Outcome
SSNs are redacted with only the last four digits visible, and medical terms are masked, meeting HIPAA standards.

Try with Samples

data-processing
Log Files with Sensitive Data
Sample log files containing various types of PII (Personally Identifiable Information) for testing PII detection and log redaction tools
title token log
sample
ELK Stack Log Analysis Samples
Comprehensive ELK Stack (Elasticsearch, Logstash, Kibana) samples for log aggregation, processing, and visualization in distributed systems
title token log
sample
Nginx Log Parser Samples
Comprehensive Nginx log samples for testing log-parser tool, including access logs and error logs with various formats and scenarios
title token log
sample
Splunk Log Analysis Samples
Comprehensive Splunk configuration and query examples for log analysis, monitoring, and operational intelligence
title token log
sample

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FAQ

What redaction strategies are available?

Strategies include full replacement, masking characters, keeping first or last N characters, hashing, and partial display (e.g., j***@email.com).

Can I create custom redaction rules?

Yes, you can define custom rules using regex patterns and specify the redaction strategy and replacement text.

Is there a preview option before applying redactions?

Yes, enable the dry run feature to preview changes without modifying the original logs.

Does the tool generate a compliance report?

Yes, you can generate a report summarizing the redactions made for audit purposes.

What compliance presets are supported?

Presets include GDPR (email, phone, IP, SSN), HIPAA (medical data plus PII), and PCI DSS (card numbers, security codes).

API Documentation

Request Endpoint

POST /en/api/tools/log-redactor

Request Parameters

Parameter Name Type Required Description
logInput textarea Yes -
presetRules select No -
rules textarea No -
caseSensitive checkbox No -
dryRun checkbox No -
generateReport checkbox No -

Response Format

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
JSON Data: JSON Data

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-log-redactor": {
      "name": "log-redactor",
      "description": "Batch redact sensitive data from logs using configurable rules and multiple strategies",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=log-redactor",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]