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Log Parser & Highlighter

Paste Logs

Paste your log file above to start parsing and filtering.

What This Tool Does

Log Parser & Highlighter is built for deterministic developer and agent workflows.

Parse and analyze logs with syntax highlighting, level filtering, search, and auto-detection for JSONL, Python, syslog, and nginx formats.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Programmatic Access

Log Parser & Highlighter is also callable as a free HTTP JSON API at https://aidevhub.io/api/log-parser/ — GET with query parameters or POST with a JSON body, no authentication, CORS enabled, 50 requests/day per IP. Responses return { ok, tool, result, meta }. 

curl -s -X POST https://aidevhub.io/api/log-parser/ \
  -H "Content-Type: application/json" \
  -d '{"logs":"2026-07-12T10:00:00Z ERROR db timeout\n2026-07-12T10:00:05Z INFO retry succeeded"}'

Machine-readable contract: /api/tool/log-parser.json All API endpoints: /agents/ LLM site index: /llms.txt

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/log-parser/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/log-parser/ GET log-parser
POST /api/log-parser/ POST log-parser

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=log-parser&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: 30 req / 60s, input max 256 KB.

How to Use Log Parser & Highlighter

  1. 1

    Paste your log file

    Paste raw logs (syslog, application logs, or JSON logs) into the input. Supports multiline entries and mixed log formats.

  2. 2

    Select log level filters

    Filter by severity: ERROR, WARN, INFO, DEBUG, TRACE. Choose multiple levels to focus on the logs that matter.

  3. 3

    Enable syntax highlighting

    The parser automatically highlights timestamps, error codes, stack traces, and key-value pairs in different colors for quick scanning.

  4. 4

    Search and analyze

    Use the search field to find specific terms, correlation IDs, or IP addresses. The parser shows frequency counts and clustering for patterns.

  5. 5

    Export filtered results

    Download the parsed and filtered logs as CSV or JSON for further analysis in spreadsheets or data tools.

Frequently Asked Questions

What is Log Parser & Highlighter?
Log Parser & Highlighter analyzes log files with syntax highlighting, level filtering, and search. It auto-detects formats including JSONL, Python logging, syslog, and nginx access logs.
How do I use Log Parser & Highlighter?
Paste your log content into the editor. The tool auto-detects the format and applies syntax highlighting. Use the level filter to show only errors or warnings, and search to find specific entries.
Is Log Parser & Highlighter free?
Yes. This tool is free to use with immediate access—no account required.
Does Log Parser & Highlighter store or send my data?
No. All processing happens entirely in your browser. Your log data never leaves your device — nothing is sent to any server.
Which log formats are supported?
The tool auto-detects and highlights JSONL structured logs, Python logging output, syslog format, and nginx access/error logs. It also supports generic log patterns with timestamp and level detection.