Convert tab-separated data to CSV without broken quoting

Step-by-step approach

Confirm the input uses actual tabs between fields, not aligned spaces.
Open the TSV to CSV Converter and load the source.
The exporter quotes commas, quotation marks and line breaks as needed.
Inspect rows containing quotes or multiline descriptions.
Download the converted file and import it with UTF-8 encoding.

Try the matching tool

Open TSV to CSV Converter to work on a local copy. Review the result before importing it elsewhere.

What this does not solve

Browser tools can validate known structures and transform available data, but cannot restore deleted or corrupted bytes, infer unknown business facts, or guarantee that a target system will import every field as intended.