Check that a document is valid JSON

Paste a document. Valid JSON is confirmed and summarised; invalid JSON is reported with the line, column and snippet where the parser gave up.

In your browser nothing you paste is uploaded

JSON

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 formatter Pretty-print JSON with two spaces, four spaces or tabs, and sort keys if you want. JSON minifier Strip every space and newline from JSON, and see how many bytes that saved. JSON repair Fix trailing commas, single quotes, unquoted keys and comments, then re-parse. JSON tree viewer Explore a large document as a collapsible tree, with every node's path one click away. JSON diff Compare two documents by value and list what was added, removed or changed, by path. JSON Pointer evaluator Resolve an RFC 6901 pointer like /users/0/email against a document and show what it points at.