Best Format for SIEM-Friendly Operational Logs

JSON logs are generally best for SIEM ingestion and rule-based analytics.

Recommended Default

JSON (Log)

Structured JSON fields map cleanly into SIEM pipelines and detections.

Files available: 4

application/json

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Alternatives

SYSLOG (Log)

Files: 4

Use syslog where existing forwarders and collectors are syslog-native.

Samples Hub

TRACE (Log)

Files: 4

Use trace data to complement timing-level investigations.

Samples Hub

Related Comparisons

Access Log vs JSON Log

Compare classic plain-text access logs with structured JSON log events.

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Format FAQs

JSON FAQ SYSLOG FAQ TRACE FAQ

Comparisons

CSV vs JSON JSON vs JSONL Protocol Buffers vs JSON GraphQL Schema vs JSON Access Log vs JSON Log

Best Format Guides

Best Data Format for APIs Best Log Format for Observability

Use-Case Recommendations

Best Format for API Response Payloads Best Format for Realtime Event Streams Best Format for Spreadsheet Data Export Best Format for Analytics Event Ingestion Best Format for Server Access Log Pipelines

How to Convert

How to Convert ACCESSLOG to JSON How to Convert CSV to JSON How to Convert GRAPHQL to JSON How to Convert JSON to ACCESSLOG How to Convert JSON to CSV How to Convert JSON to GRAPHQL How to Convert JSON to JSONL How to Convert JSON to PROTO