String Obfuscator

String to obfuscate:

Keep first:

chars

Keep last:

chars

Keep spaces:

Result:

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.

Obfuscate strings for safer sharing

The string obfuscator turns a piece of text – such as a secret, an IBAN or a token – into an unreadable form that you can share a little more safely over chat, a ticket or email. Important: obfuscation is not encryption. It guards against casual reading and accidental indexing, but it does not replace real cryptography for highly sensitive data. The tool runs entirely in your browser, so your text never leaves the device.

Common use cases

Share secrets in support: Pass a key or password in a ticket without it appearing in plaintext in logs or search indexes.
Document examples: Show the shape of a token or an IBAN in a guide without revealing the real value.
Discourage shoulder surfing: Display values in screenshots or presentations so they cannot be read at a glance.
Restore it quickly: Turn the original string back when you need it using the matching method.

How to obfuscate a string

1 Paste the string you want to obfuscate into the input field.
2 Choose the obfuscation method you prefer.
3 Copy the obfuscated result and share it.
4 To reverse it, paste the obfuscated value back in.

Obfuscation vs. encryption

The key difference: obfuscation can be undone by anyone with the same tool – it raises the bar but offers no cryptographic security. For genuine protection of confidential data you need encryption with a secret key. So use obfuscation deliberately where the goal is convenience and protection against accidental reading, not protection against determined attackers. Because everything happens locally, the plaintext stays on your computer.

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