JSON concat arrays
ClientMerge batch chunks back into a single list—pairs with array-chunks split workflows.
Learn more: concatenating arrays
Root must be an array whose elements are arrays—non-array elements produce an error.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Input
?
Nearby workflows on Toolcore
- JSON array chunks — Split a JSON array into fixed-size batches or merge nested arrays into one list—pagination and bulk helpers, client-side. once JSON text parses on this page.
- JSON flatten arrays (one level) — Flatten a JSON array by one level—[[1,2],3] becomes [1,2,3]—client-side. 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.
- NDJSON / JSON Lines — Newline-delimited JSON: lines to array, array to lines, validate, minify—client-side. once JSON text parses on this page.
Common use cases
- Merge batch chunks back into a single list—pairs with array-chunks split workflows.
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 array chunks
ClientSplit a JSON array into fixed-size batches or merge nested arrays into one list—pagination and bulk helpers, client-side.
JSON flatten arrays (one level)
ClientFlatten a JSON array by one level—[[1,2],3] becomes [1,2,3]—client-side.
JSON dedupe array
ClientRemove duplicate elements from a JSON array—first occurrence wins, order preserved.
NDJSON / JSON Lines
ClientNewline-delimited JSON: lines to array, array to lines, validate, minify—client-side.