About Extract substring
World's simplest browser-based utility for extracting substrings from text. Input your text and specify start and end positions to extract the desired portion. Perfect for data processing, text analysis, or extracting specific content from larger text blocks.
- 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 Extract substring
- 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 Extract substring
What input does Extract substring 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 Extract substring?
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