ToolJovia
Data

CSV Record Concatenator

Append local CSV records with strict, intersection or union header alignment and source-file provenance.

✓ Browser-local processing
Files are read locally and are not uploaded.

Loading tool…

How to use CSV Record Concatenator

Combine actual CSV records without splitting quoted multiline fields. Header policy determines whether missing columns are refused, omitted, or exported as empty cells.

  1. Enter ordered csv files, source column name.
  2. Choose the settings for csv record concatenator, then run the tool.
  3. Review the result and any limitations before copying or downloading it.

Good to know

  • Up to100,000 input characters,5000 records and100 columns per table. Downloads quote cells, protect formula-like values and disambiguate colliding exported headers.
  • 20 UTF-8 files,200,000 bytes each and2MiB aggregate. Strict mode permits reordered columns, aligning by exact header name. File selection order is retained.
  • Processing is local. Output is limited to 1,000,000 text characters unless a stricter file limit is stated.

Common questions

Will repeated headers become data rows?

No. Each input is parsed separately and its header is used to align the records.

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.

Keep going with related tools

All data →
Data

CSV Join Workbench

Join two CSV tables by explicit composite keys with inner, left or full record-preserving joins.

Files

Record-aware File Splitter

Split a UTF-8 CSV or NDJSON file into independently readable record parts in a stored ZIP.

Data

CSV Validator

Check CSV quoting and record widths, reporting row and column counts with header warnings.

Data

CSV Stratified Sampler

Sample up to a declared number of CSV records from each exact group without replacement.

Data

CSV Multivalue Exploder

Expand a selected multivalue CSV cell into separate records while retaining every other column.