Mapped CSV Codes to Reviewed JSON

Apply an exact string code map with unknown-code refusal, select reviewed fields, name the output schema and download JSON records.

Browser-local file processing; runtime assets load separately. No upload. Originals/checkpoints retain source content.

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About this flow

Explicit code normalization plus reviewed field/schema projection; distinct from generic clean CSV import and from standalone single-column value mapping.

Limitations

One rectangular comma CSV with codes in column2. Mapping is a strict JSON object of literal string replacements, at most1MiB/10000entries; exact case/space, no trimming/type coercion/cascading. Unmapped codes reject the whole step. Selected columns and unique nonempty output names define this reviewed schema; JSON values all remain strings. Input5MiB/50000rows/500columns/500000cells; intermediate files must fit downstream5MiB and output20MiB. Original and mapped checkpoints retain internal fields/codes. Spreadsheet protection is off in intermediate CSV; JSON is not executed as a spreadsheet. This is not anonymization, a relational lookup, destination schema validation or a completed external import.
No destination import, accounting validation, native Office rendering, universal feature compatibility or privacy erasure is claimed.