Wide Survey Export to Long JSON Records

Select identifiers and measures, reshape each selected measure into an ordered record and export string-valued JSON.

Input/output processing stays local. Original and checkpoint downloads can retain omitted/replaced values. No all-secrets-removed, anonymization, heap-erasure or security certification.

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About this flow

Select identifiers and measures, reshape each selected measure into an ordered record and export string-valued JSON. Existing select/filter/cleanup recipes do not expand wide measure columns into long records. This is a structural wide-to-long import job, retaining every blank/string value and source-row/measure ordering rather than merely reformatting CSV.

Limitations

Each downstream CSV/JSON input remains limited to 5 MiB; a larger completed intermediate stays a checkpoint and final success is refused. Originals/checkpoints retain omitted or replaced values. One comma-delimited UTF-8 CSV5MiB/50,000rows/500columns/500,000cells. Identifier/measure positions are disjoint and unique; measure selection is nonempty. Expansion must fit50,000data rows/500columns/500,000cells including header before allocation. Output headers must remain nonempty/unique. Order is source-row then chosen-measure order. Blank answers, leading zeros and numeric/boolean/NULL-looking values remain strings. No aggregation, numeric coercion, missing-value inference, survey analysis or database import. Original/selected checkpoints contain omitted private fields.
No native other-browser/physical-device/heap-erasure acceptance is established.
Choose a saved comma-delimited CSV input; the first step fixes comma parsing. TSV input is not offered by this recipe.