Free tool
Check it before you paste it.
Paste text and see whether it holds card numbers, bank accounts, ID numbers, API keys or passwords, then share a masked copy instead. It all happens in your browser.
This is checked in your browser. The text is never sent anywhere.
- 01
Paste the text
A chat prompt, a support ticket, a log, an email. Whatever you are about to share.
- 02
We look for what should not leave
Card numbers, bank accounts, ID numbers, keys and passwords, each checked properly so ordinary numbers are left alone.
- 03
Share the masked copy
Each sensitive item is replaced with a label. Copy that version instead.
Questions
→Is my text sent anywhere?
No. It is checked by your own browser and never leaves this page. You can disconnect from the internet and it still works.
→Why do I need this for AI chats?
What you paste into an AI tool may be stored, reviewed or used to improve it, depending on the tool and your plan. Card numbers, keys and ID numbers are the things you cannot take back once shared.
→How does it avoid flagging ordinary numbers?
Each kind is validated the way the number itself is: card numbers must belong to a real card network and pass its check, IBANs and Turkish ID numbers must pass their own checksums. A random long number is left alone.
→What can it not find?
Names, addresses, and secrets written in plain sentences, such as "the door code is five five two". It is a safety net for the obvious, not a guarantee.