String Obfuscator
Obfuscate a string (like a secret, IBAN or token) so you can share it and keep it identifiable without revealing its content.
How does the String Obfuscator work?
The obfuscator replaces the middle characters of a string with asterisks (*). The first and last N characters remain visible so the string is still identifiable.
Typical use cases
Perfect for log entries, support tickets and screenshots: obfuscate IBAN or credit card numbers, API keys, passwords and other sensitive strings.
100% local, no data leaves the browser
The entire process runs exclusively in your browser. No data is sent to any server – your sensitive information stays private.
Frequently Asked Questions
Answers to common questions about the String Obfuscator
An obfuscated string is a text where the middle characters have been replaced with asterisks (*). The first and last characters remain so the string is still identifiable without revealing its full content. This technique is commonly used for IBANs, credit card numbers or API keys.
For IBANs, showing 4 visible characters at the start (country code) and 4 at the end (last digits for identification) works well. For API keys, showing only 3–4 characters at the start may be sufficient. Adjust the values so the string remains recognizable but not fully readable.
No. The String Obfuscator works entirely locally in your browser. Your inputs are neither stored nor sent to any server. All calculations happen exclusively on your device.
When "Keep spaces" is enabled, spaces in the string are not replaced with asterisks but remain as spaces. This preserves the word structure and makes the obfuscated text easier to read. When disabled, spaces are also replaced with *.
Yes, the obfuscator works well for redacting passwords in screenshots, logs or support tickets. However, be aware that very short passwords with large visible beginning and end ranges could be easy to guess – choose conservative values accordingly.