JSON Key Counter Occurrence Counter Online

Count how many times each key appears across all objects in JSON.

For CSV to JSON conversion, paste your CSV data and click CSV → JSON. The tool automatically detects numbers and booleans, producing clean typed JSON output. Toggle the "First row is header" option to match your CSV format.

Step 1: Paste JSON

Counts all key occurrences at every depth level.

Nested keys counted?

Yes, keys at all nesting levels are counted globally.

What delimiters are supported?

Comma (,), semicolon (;), tab, and pipe (|). Choose the delimiter that matches your target application. CSV-to-JSON conversion auto-detects the delimiter.