# Sensitive data masking tool

> Preview and redact configured text patterns; detection is not exhaustive.

[Open tool](https://www.toolcabana.com/tr/sensitive-data-masking-tool) · [Privacy and security education](https://www.toolcabana.com/tr/category/privacy-and-security-education)

Tool ID: sensitive-data-masking-tool. Requested language: tr. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

Sensitive data masking tool replaces email addresses, phone-like digit sequences and card-like numbers in pasted text with a replacement string, [REDACTED] by default. Each of the three pattern types can be switched on or off, and the masked text downloads as masked.txt. Detection is pattern-based, not exhaustive, and may also mask unrelated numbers, so review the output.

## Supported tasks (en)

Preview and redact configured text patterns; detection is not exhaustive.

## Steps (en)

1. Type or paste your source, or load an example.
2. Change the basic settings or open Advanced mode to fine-tune the result.
3. Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.

## Settings

- Mask email addresses (en; key: email; type: checkbox)
- Mask phone-like digit sequences (en; key: phone; type: checkbox)
- Mask card-like digit sequences (en; key: card; type: checkbox)
- Replacement (en; key: replacement; type: text)

## Limitations (en)

CSV/XLSX inputs are capped at 10 MB each, 200 columns and 20,000 rows; joined output is capped at 20,000 rows. JSONPath script/filter evaluation is disabled. Other operations apply their visible controls and text limits.

## Example input

```text
Contact alex@example.com or +1 202 555 0100.
```

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### Can I change the \[REDACTED\] placeholder?

Yes. Type any text in the Replacement field, such as XXX or [hidden], and every masked item uses it. The same replacement is applied to emails, phone numbers and card numbers alike, so the output does not show which type was removed.

### Why were order numbers masked by the masking tool?

The card rule masks any run of 13 to 19 digits, optionally separated by spaces or hyphens, without checksum validation, and the phone rule matches many grouped digit sequences. Turn off a category in settings if it catches numbers you need to keep.

### Can I mask only email addresses and keep phone numbers?

Yes. Uncheck Mask phone-like digit sequences and Mask card-like digit sequences, leaving Mask email addresses on. Email addresses are matched case-insensitively in the common name@domain form with a top-level domain of at least two letters.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

CSV/XLSX inputs are capped at 10 MB each, 200 columns and 20,000 rows; joined output is capped at 20,000 rows. JSONPath script/filter evaluation is disabled. Other operations apply their visible controls and text limits.

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