Record inner join — Offline Utility

Join matching scalar keys and preserve left/right records separately.

A focused local HTML utility with labeled inputs, a synthetic example and downloadable JSON results. Includes usage documentation, privacy notes and a single-user license for personal and commercial work. Unzip, open the HTML file, try the example and review the result. No subscription, account or telemetry in the utility.

Duplicate matching keys create multiple pairs; maximum 1,000 results. JSON-only; maximum 10,000 nodes, depth 30, arrays 2,000 elements and strings 100,000 characters; aggregate text and cumulative copies limited to 1,000,000 characters. Integers must be safely representable; decimals use JavaScript precision. Interface input limit: 200,000 characters. Downloads contain your submitted input and output; review before sharing.

Try the FREE Stable Line Deduplicator in this store first. Release candidate: automated logic and simulated-interface checks passed; graphical browser compatibility remains unverified.