No API fees · Runs on your device · Pattern redaction
Contact pattern masker
Replace recognized contact patterns with numbered placeholders.
Choose a local model, trainable classifier or statistical helper. Inputs stay on your device; model files download only when you run a model tool.
Text & settings
Analysis result
Enter your text or try a sample.
Method & limitations
Replaces recognized contact patterns with numbered placeholders such as [EMAIL_1]. Select one pattern type or all. All matching occurrences are replaced, while unrelated source content remains. Names, street addresses, passwords and arbitrary sensitive details are outside these patterns. Review manually before sharing.
Runs in a Web Worker. Inputs and results are cleared when you leave or choose Clear text; they are not saved in browser storage. Downloaded files remain on your device.
A guide to this tool
How to use Contact pattern masker
- Enter your text or load this tool’s sample.
- Choose the available settings and fill in a second input if this tool has one.
- Run the analysis and review the output and method notes before using it.
A sample you can try
Sample input
Email demo@example.com or call +44 20 7946 0958. Visit https://example.com/help for details. This fictional name is not masked.
Sample output
Email [EMAIL_1] or call [PHONE_1]. Visit [URL_1] for details. This fictional name is not masked.