JSON index of value
ClientLocate an item in primitive arrays—returns -1 when missing.
Learn more: indexOf
Compares with JSON.stringify equality on top-level array only.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Nearby workflows on Toolcore
- JSON includes value — Check whether a JSON value appears anywhere in the document—local walk. once JSON text parses on this page.
- JSON filter array by type — Keep array elements matching one JSON type—string, number, boolean, object, array, or null. once JSON text parses on this page.
- JSON dedupe array — Remove duplicate elements from a JSON array—first occurrence wins, order preserved. once JSON text parses on this page.
- JSON formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.
Common use cases
- Locate an item in primitive arrays—returns -1 when missing.
- Paste valid JSON, then read the transformed output below.
Common mistakes to avoid
Invalid JSON
Fix parse errors before expecting output.
FAQ
Is data uploaded?
No—all parsing and transforms run locally.
How is this different from jq?
This page focuses on one deterministic task without a filter language.
More tools
Related utilities you can open in another tab—mostly client-side.
JSON includes value
ClientCheck whether a JSON value appears anywhere in the document—local walk.
JSON filter array by type
ClientKeep array elements matching one JSON type—string, number, boolean, object, array, or null.
JSON dedupe array
ClientRemove duplicate elements from a JSON array—first occurrence wins, order preserved.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.