NullKit

Guide

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Find and mask common emails, phone numbers, IP addresses, payment-card-like numbers, URLs, and your own specified terms without uploading the text.

Clear answers

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Find and mask common emails, phone numbers, IP addresses, payment-card-like numbers, URLs, and your own specified terms without uploading the text.

01

Does the text leave this browser?

No. Pattern detection and replacement run in the current tab without a submission request.

  • Pattern-based local detection
02

Can it find every name or address?

No. This version uses explicit patterns and custom terms, not an AI model. Always read the complete result before sharing it.

  • Custom terms and category controls
03

Are card-like numbers validated?

The tool uses length, formatting, and a Luhn checksum to reduce false matches, but the result still requires manual review.

  • Redaction receipt and editable output

A local check

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Find and mask common emails, phone numbers, IP addresses, payment-card-like numbers, URLs, and your own specified terms without uploading the text.

01

Selected file

Paste text without including anything you cannot safely display on your current device.

Paste text without including anything you cannot safely display on your current device.

02

Review before sharing

Custom terms and category controls

Choose detection categories and add optional custom terms.

03

Local verification

Create the redacted copy and review every replacement.

Create the redacted copy and review every replacement.

Edit remaining details manually before copying or downloading.

Four local steps

Can it find every name or address?

  1. 01

    Pattern-based local detection

    Paste text without including anything you cannot safely display on your current device.

  2. 02

    Custom terms and category controls

    Choose detection categories and add optional custom terms.

  3. 03

    Redaction receipt and editable output

    Create the redacted copy and review every replacement.

  4. 04

    Pattern-based local detection

    Edit remaining details manually before copying or downloading.

Browser privacy

Sensitive Text Redactor

Pattern-based local detection

No. Pattern detection and replacement run in the current tab without a submission request.

Custom terms and category controls

No. This version uses explicit patterns and custom terms, not an AI model. Always read the complete result before sharing it.

Redaction receipt and editable output

The tool uses length, formatting, and a Luhn checksum to reduce false matches, but the result still requires manual review.

Clear answers

Are card-like numbers validated?

The tool uses length, formatting, and a Luhn checksum to reduce false matches, but the result still requires manual review.

Private workspace

Sensitive Text Redactor

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Sensitive Text Redactor

Guides

Guide Let local OCR suggest common identifiers, add or remove covers yourself, and export a flattened copy whose selected pixels are permanently replaced.

For this image tool, the selected pixels are replaced in the exported bitmap rather than covered by a removable document annotation. You should still inspect the final copy carefully.

 Guide Create a new credential with secure device randomness without submitting it to a password-generation service.

No. Generation uses crypto.getRandomValues in this browser and the page does not submit the result.

 Guide What photo metadata can reveal.

Remove EXIF, GPS, photo metadata, and optional AI Content Credentials from one photo or a folder locally. Inspect first, then save verified clean copies.