String Obfuscator Online - Mask Sensitive Text
Mask the middle of a string while retaining a small prefix and suffix for recognizable sharing.
About this tool
Strings of four characters or fewer are fully replaced with asterisks. Longer strings keep their first and last two characters and mask up to twenty middle characters.
How to use
- Enter the value in the format described by the tool.
- Run the conversion or calculation in your browser.
- Review and copy the generated result.
Features
- One-click local masking.
- Keeps a recognizable prefix and suffix.
- Fully masks short values.
Common use cases
- Redact API keys in screenshots.
- Share partially hidden identifiers.
- Mask sample account values in support messages.
Common issues and tips
- Obfuscation is not encryption and can reveal length or edge characters.
- Very long strings use at most twenty masking characters, so output length may differ.
Privacy
Processing runs locally in your browser. Input is not uploaded to Tools12345.
Frequently asked questions
Is masked text encrypted?
No, it is only a display-safe redaction.
What remains visible?
For longer strings, the first and last two characters.
Can the original be restored?
No restoration data is stored by the tool.