# Redact PII from CSV exports

> Send a CSV and get a redacted CSV back. Per-cell redaction across every column, with headers and structure preserved.

Canonical: https://bitbanger.in/use-cases/csv-export
Last updated: 2026-10-27

Analytics and CRM exports are the most common way personal data leaves a company. The usual approach — ask an analyst to drop a few columns — misses the PII that ends up in free-text fields such as notes and descriptions. Redactly processes every cell instead.

## What this gives you

- Per-cell redaction: each cell is scanned independently, so a name inside a free-text note is found even when the column is called notes.
- Structure is preserved. Headers, row order, quoting, and column count come back unchanged.
- No row limits imposed by the API; the only practical constraint is your request size.
- Use style=remove if you want the cell emptied instead of labelled.

## Request

```bash
curl -X POST https://api.bitbanger.in/v1/redact/file \
  -H "X-API-Key: rdct_your_key_here" \
  -F "file=@customers.csv" \
  -F "style=replace" \
  --output customers_redacted.csv
```

## FAQ

**Does it redact column headers?**

Yes. Every cell including headers is scanned, so an email address used as a column name is also redacted.

**What happens to numeric columns?**

They are scanned as text, so a phone number stored as an integer is still detected and replaced with a label.

## Related

- [All 40 entity types](https://bitbanger.in/entities/)
- [Integrations](https://bitbanger.in/integrations/)
- [API reference](https://bitbanger.in/docs)

Live demo: https://bitbanger.in/use-cases/csv-export