Fix CSV columns shifting after import

Step-by-step approach

1. Inspect the raw file for unquoted commas inside addresses, names or notes.
2. Check if the first line is a header and whether every row has the same field count.
3. Confirm the delimiter used by the exporter, particularly when Excel uses semicolons.
4. Run a structural profile, repair quoting in the original source if malformed, then re-export.
5. Import using the correct delimiter and UTF-8 encoding rather than double-clicking CSV blindly.

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.