ToolJovia
Data

CSV Priority Column Coalescer

Choose a first-present value across explicit source columns and retain its column provenance.

✓ Browser-local processing
Processed in this tab. Up to 100,000 characters unless this tool states a smaller limit.

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How to use CSV Priority Column Coalescer

Reconcile fallback fields such as primary and backup contact values within each record. The original columns stay intact, and you can refuse rows with conflicting present values instead of silently treating one as authoritative.

  1. Enter input, priority column names json, exact missing-token json, new value column.
  2. Choose the settings for csv priority column coalescer, then run the tool.
  3. Review the result and any limitations before copying or downloading it.

Good to know

  • 200,000 CSV characters,5000 records and 100 source columns. Evidence is limited to 1000 records/200,000 serialized characters, with explicit truncation.
  • Exact declared missing tokens and source-column order only. No cross-row fill, identity matching or automatic conflict resolution. CSV downloads protect formula-like prefixes.
  • Processing is local. Output is limited to 1,000,000 text characters unless a stricter file limit is stated.

Common questions

How is an empty chosen value distinguished from no available value?

The companion source-column field identifies a chosen source. It is blank when every selected source matches a declared missing token.

Is this input sent to a server?

No. The application processes this input inside your browser tab and does not save it to persistent storage.

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