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A lightweight, cross-platform desktop viewer for continuously growing JSONL logs.
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README.md

Tracebeam

A lightweight, cross-platform desktop viewer for continuously growing JSONL logs. The Rust core incrementally indexes appended lines; the UI provides fast text/regex search, level and scope filters, pagination, live refresh, and structured JSON inspection.

Tracebeam showing a simulated JSONL log

The screenshot uses examples/demo.jsonl. While developing, open http://127.0.0.1:1420/?demo to reproduce the preview without the desktop file picker.

Development

pnpm install
pnpm dev

Each line should contain one JSON object. Tracebeam recognizes timestamp/time/ts, level/severity, scope/namespace/module, and message/msg automatically while keeping all other metadata available in the detail view.