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.
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
JSON Schema: Validate Data Online (Draft 2020-12)
Test API payloads and config files against JSON Schema Draft 2020-12 — errors pinpointed by JSON Pointer path, in the browser.
JSON Formatter, Diff and Tree Viewer: Compare and Explore Payloads
Format, diff two API responses and explore deep JSON in a tree — a no-install debug workflow in your browser.
Validate and Repair JSON Online: A Practical Guide
Trailing commas, single quotes, Excel exports: diagnose and fix broken JSON before it reaches production.
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.