JSONL diff online

Compare JSON Lines and NDJSON records with a structured diff. DiffLens parses each line as JSON, compares records by index or key, and keeps comparison content local in your browser.

• Works for logs, event streams, exports, and newline-delimited JSON datasets.
• Supports field-level diffs, array keys, ignored paths, and inline value highlights.
• Formats each record as compact JSONL while preserving one JSON value per line.