Log Tools Hub — JSON, NDJSON & Access Logs

Four browser-based utilities to format, filter and validate JSON/NDJSON logs, and convert Nginx/Apache access logs to CSV/TSV. For single-document JSON see also JSON formatter and JSON validator.

Pretty-print or compact JSON/NDJSON log dumps.
Filter lines by level or substring during incident triage.
Turn Nginx/Apache access logs into spreadsheet-friendly CSV/TSV.

Back to log tools on the hub

Format JSON Logs

Pretty-print a JSON document or normalize NDJSON — indent for single documents only.

Filter JSON Logs

Filter NDJSON by level and substring — invalid lines skipped or kept.

Validate NDJSON

Validate NDJSON: report counts or extract valid lines.

Access Log to Table

Parse combined/common access logs into CSV or TSV.

Guides

Optimize REST API Performance with JSON Minification

Speed up your REST APIs by optimizing JSON payloads. Minification, compression, pagination and best practices for ultra-fast APIs.

JSON Minification Guide — APIs, Config Files & Express

Minify JSON for APIs and config files: JavaScript, Python and jq examples, Express middleware, and when minification beats pretty-printing in production.