About Hidden Character Detector
This tool helps you detect hidden Unicode characters in text, particularly Right-to-Left (RTL) Override characters that can be used in attacks. It can identify invisible characters, zero-width characters, and other potentially malicious Unicode sequences that might be hidden in seemingly innocent text.
- Input
- Text or data in the format described by this tool. Keep the original input if you need to compare the transformation.
- Output
- The result is shown in the work area. Use the copy or download controls provided by this tool.
- Processing
- The current implementation computes this tool's results in your browser. No account is required.
- Limits and behavior
- The selected separators, units and options affect the result. Very large inputs can make the browser slow. This page describes the current implementation, not every possible input combination.
How to use Hidden Character Detector
- Paste or import your input, or enter values in the available fields.
- Choose settings and check the automatically updated result.
- Copy or download the result using the available controls.
Questions about Hidden Character Detector
What input does Hidden Character Detector accept?
Text or data in the format described by this tool. Keep the original input if you need to compare the transformation.
How do I save the result from Hidden Character Detector?
The result is shown in the work area. Use the copy or download controls provided by this tool.
What limitations should I know about?
The selected separators, units and options affect the result. Very large inputs can make the browser slow. This page describes the current implementation, not every possible input combination.
Where does processing happen?
The current implementation computes this tool's results in your browser. No account is required.
Implementation notes reviewed: 2026-10-25