Structured Log Viewer
Paste NDJSON, logfmt or plain-text logs and explore them online for free: level and text filters, level-stat bars, error clustering with digit normalization, and a scrollable entry view.
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What is Structured Log Viewer?
The Structured Log Viewer parses NDJSON, logfmt and plain-text logs in your browser, summarizes levels into stat bars, clusters repeated errors with digits normalized, and filters entries by level and free text - all in one paste, with nothing uploaded.
Key Benefits
- Mixed log formats in one paste without a format picker
- Level bars reveal log health at a glance
- Retry storms collapse into single error clusters
- Level and text filters narrow thousands of lines instantly
- Sensitive logs stay local - fully client-side
Common Use Cases
- •Triaging incident logs copied from a Kubernetes pod
- •Reviewing application logs before opening a bug report
- •Comparing error frequency across deploy windows
- •Teaching teammates how to read structured logs
How to Explore Logs
- Paste the logs: Paste NDJSON, logfmt or plain-text lines - mixed formats are fine in one paste.
- Check the stats: The level bars show how many errors, warnings, infos and debug lines were parsed.
- Inspect clusters: Repeated errors collapse into clusters with digits normalized, so retry storms stand out.
- Filter the entries: Narrow by level or search text, then scroll the entry list to investigate.
Key Features
- NDJSON, logfmt and plain-text parsing in one paste
- Per-level stat bars with counts
- Error clustering with digits normalized to #
- Level filter plus free-text entry search
- Scrollable entry view with level badges
- Sensitive logs stay local - fully client-side