Local application-log explorer

What it does

Map JSONL log fields, filter a chronological timeline and inspect repeated error messages without uploading logs.

How to use it

1. Paste or import JSONL and map the timestamp, level, message and request-ID keys.
2. Read the timeline, filter it and download the selected records. Date filter inputs use your local time.
3. Processing stays in your browser. No upload or sign-up.

Example

Read the example request req-1, then filter severity to error to isolate its failed connection.

Methodology

Maps top-level keys, validates timestamps, sorts records chronologically and applies literal filters. Repeated error/fatal/critical messages are grouped exactly.

Limitations

5 million characters and 10,000 lines; timestamp values must parse as dates. No live streaming, nested field paths or automatic redaction. Exported logs can contain sensitive data.

Automation

This tool runs in your browser. No upload API or MCP endpoint is available.