Free tools Everything JSON

Merge one document into another

Paste a base and an overlay. Objects are merged key by key at every depth; you choose whether an array in the overlay replaces or extends the one it lands on.

In your browser nothing you paste is uploaded

Sentrint reads a whole repository and reports what an attacker would find first, in plain English, with a fix you can paste back into the tool that built the app.

Free scan
More JSON tools
JSON key sorter Reorder every object's keys alphabetically so two documents diff cleanly. JSON flattener Collapse nested JSON to a single level of dotted paths, and expand it back. JSON Patch playground Apply an RFC 6902 patch to a document and watch each operation take effect. JSON redact Mask the values of sensitive keys before you paste a config into a ticket or chat. JSON formatter Pretty-print JSON with two spaces, four spaces or tabs, and sort keys if you want. JSON validator Check whether a document is valid JSON and jump to the character that breaks it.