Analyze JSON

Inspect and audit JSON data structures online. Analyzes maximum nesting depth, object key frequencies, value type breakdowns, array lengths, byte sizes, and renders an interactive structural tree hierarchy.

Private • In-browser processing • Zero server uploads

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How to Use Analyze JSON

1
Paste JSON
Paste your JSON payload into the input editor or load from a file.
2
Choose View
Select 'All', 'Summary Metrics Only', or 'Structural Tree Only'.
3
Review Metrics
Instantly see structural depths, key frequencies, and memory byte stats.

Key Features

Maximum Depth Calculation
Traverses all nested objects and arrays to find the deepest hierarchical level.
Comprehensive Key & Type Counts
Reports total keys, unique keys, and distribution counts for strings, numbers, booleans, and nulls.
Array Node Statistics
Measures total array nodes along with minimum, maximum, and average array lengths.
ASCII Tree View
Generates an ASCII branch hierarchy tree (`├──`, `└──`) for fast visual schema inspection.

Common Use Cases

  • Auditing complex API responses before architecting client-side TypeScript interfaces.
  • Benchmarking payload sizes and identifying bloated arrays or overly deep nesting.
  • Detecting inconsistent schemas or missing keys across large lists of JSON objects.
  • Visualizing document database schemas (MongoDB, CouchDB) in a readable hierarchy.

Frequently Asked Questions

Nesting depth is the maximum number of nested object or array layers inside a JSON document. For example, `{ "a": { "b": 1 } }` has a depth of 3.

Deeply nested JSON can cause stack overflow exceptions during parsing, slows down deserialization, and complicates database querying.

The tree view draws an ASCII hierarchy representing the nodes of your JSON object, showing the types and preview values of keys and array lengths without overwhelming the screen.

Prettify JSON
Format, minify, validate or sort keys of any JSON — live in your browser.
Minify JSON
Remove all whitespace from JSON and compress it to a single line.
Find List Length
Count the number of items in a list (one per line) instantly.
Find Repeating List Items
Find which items appear more than once in a list and show their count.
Validate YAML
Check if a YAML document is valid and show a formatted parse tree.