JSON Parser Online
Paste JSON and explore it as a collapsible tree — each branch shows its count, leaves are coloured by type, and statistics at the bottom summarise the shape (depth, total keys, type counts).
Last updated: May 27, 2026
Find this tool useful? Support the project to keep it free!
Buy me a coffeeWhat is JSON Parser Online?
Parsing JSON in a text editor only tells you whether the syntax is valid — it does not show the structure. For nested or large JSON, you usually want a tree view: each object collapses to a single line until you expand it, arrays show their length, and leaf values are typed and coloured.
This tool parses JSON with the strict built-in `JSON.parse`, then renders the result as an interactive tree. Each object and array shows its size; each scalar leaf is coloured by type. The statistics panel counts every value in the document by type and reports the maximum nesting depth — useful when you are deciding whether a JSON payload is becoming unwieldy or when you are validating a schema constraint informally.
How to Use JSON Parser Online
Paste JSON into the input panel (or load the sample).
The tree updates live. Click ▸ to expand or collapse any branch.
Use the statistics panel to inspect counts and depth.
Copy the formatted JSON via the Copy button.
Common Use Cases
- Quickly understanding the shape of a JSON payload from an API.
- Spotting parse errors with line and column without dropping into a code editor.
- Comparing two JSON documents informally by looking at the type counts and depth.
- Producing a printable indented representation by adjusting the indent setting.
Example Input and Output
A nested JSON value parses into a tree with two top-level keys and 9 total leaves.
{"user":{"id":42,"name":"Alice","roles":["admin","editor"]},"ts":1716800000}2 objects · 1 array · 3 strings · 2 numbers · max depth 3Privacy
All JSON parsing and tree rendering happen in your browser. No content is sent to a server.
Large documents
Very large JSON payloads (tens of MB) render slowly because the tree expands lazily but the parse and statistics walk are eager. For huge documents, prefer a streaming tool.