Free tools

Everything you do to a block of JSON

Format it, check it parses, make it smaller, convert it, or reshape it. Every tool here runs in this tab, so an API response with a token in it is safe to paste.

Format and validate
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. 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.
Explore
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.
Convert
JSON to CSV Turn an array of objects into a CSV, with nested keys flattened to dotted columns. JSON to NDJSON Convert between a JSON array and newline-delimited JSON, one compact record per line. JSON to YAML Convert JSON to readable YAML, with block strings for multi-line text.
Encode
JSON string escape Escape a block of text so it is a valid JSON string value, or unescape one back. JSON in a URL Percent-encode a JSON value for a query parameter, or decode one back and pretty-print it.
Reshape
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 merge Deep-merge two documents, with a choice of replacing or concatenating arrays. JSON redact Mask the values of sensitive keys before you paste a config into a ticket or chat.
Schema
JSON Schema generator Infer a JSON Schema from an example document, with types, required keys and common formats.

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