ValidateThis

Log File Analyzer

Related tools

Validators and utilities that complement Log File Analyzer — same session, no sign-up.

Analyze log files: count lines by level (ERROR, WARN, INFO, DEBUG, TRACE) and see sample lines.

About this tool

Paste log content and get a summary: total lines, empty lines, and counts per level. Levels are detected by keywords (ERROR, FATAL, WARN, INFO, DEBUG, TRACE). Up to 5 sample lines per level are shown.

For full log management and ingestion: Loggly, Papertrail.

How to use this tool

  1. Paste your sample in the input (or fetch from URL if this tool supports it).
  2. Run the main action on the page to execute Log File Analyzer.
  3. Read the result, fix the source data or config, and re-run if needed.

What this check helps you catch

  • Analyze log files: count lines by level (ERROR, WARN, INFO, DEBUG, TRACE) and see sample lines.
  • Limits called out in the description (what this tool does not verify — e.g. live network reachability, issuer databases, or strict schema contracts unless stated).
  • Structural or syntax mistakes that would break parsers, serializers, or the next step in your workflow.

FAQ

What does Log File Analyzer do?
Analyze log files: count lines by level (ERROR, WARN, INFO, DEBUG, TRACE) and see sample lines. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.
Is this a substitute for server-side validation?
No. Use it for manual checks and triage; production systems should still validate and authorize on the server.
Where does processing happen?
Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.