File viewer

Log File Viewer

Paste logs or drag and drop a log file to inspect severity levels, timestamps, search matches, and filtered output locally in your browser.

Runs Locally

This tool runs in your browser. Files never leave your device.

Log input

Drop a .log, .txt, .out, .err, .jsonl, or .ndjson file here.

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Search logs

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SeverityOnly matchesLine numbersWrap lines

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Size

460 B

Timestamps

Severity breakdown

Showing 7 of 7 lines.

1info2026-06-20 14:03:11 INFO server started on port 3000

2warn2026-06-20 14:03:18 WARN cache miss for key=user:1842

3error2026-06-20 14:04:02 ERROR failed to connect to database: timeout after 5000ms

4debug2026-06-20 14:04:09 DEBUG retrying database connection attempt=2

5info2026-06-20 14:04:11 INFO database connection restored

6fatal[2026-06-20T14:05:40.921Z] FATAL worker crashed pid=7784 code=1

7unknown127.0.0.1 - - [20/Jun/2026:14:06:04 -0400] "GET /tools/log-file-viewer HTTP/1.1" 200 4381