Log Parser Online — JSON Lines, logfmt, and Access Logs
Parse JSON logs, logfmt, and Nginx or Apache combined access logs in the browser. Pick fields, preview the rows, and download CSV or JSON.
Turn a log paste into rows.
Application logs show up as JSON lines, logfmt, or access-log text. Spoold's Log Parser splits each line into a level, a message, and fields so you can keep the errors and search a path.
What each format gives you
- JSON lines — one object per line. Nested objects become dotted keys such as
http.status. - logfmt —
level=error msg="payment failed". - Access logs — combined format. 5xx is an error, 4xx is a warning, and the message is method, path, and status.
- Level lines — a timestamp plus INFO, WARN, or ERROR.
A short workflow
- Paste the excerpt, or load a sample to see the shape.
- Leave Auto on unless the file is mixed and you want one parser.
- Click a level chip, then search for a path, user, or error code.
- In Extract, keep the suggested field chips or type names such as
status, path. Emails, URLs, IPs, andname=valuepairs are read from the raw line, including plain text. Preview the table, then download CSV or JSON. - Select a row to read the fields. For a JSON body you still want to query, use the JSONPath tester.
Logs often contain personal data. Parsing is local, but a share link contains the text you pasted. Redact tokens and emails first.
Parse a log excerpt
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