How does substring extraction work?

Set the start position (1-based) and length. The matching portion of text is extracted and displayed as the result.

What is 1-based indexing?

Position 1 refers to the first character of the text. This is different from programming languages that use 0-based indexing.

In multi-line mode, each line is processed independently. The same start position and length are applied to each line separately.

Reverse extraction counts positions from the end of the text. Position 1 is the last character, position 2 is the second-to-last, and so on.

Yes. All processing happens locally in your browser. No data is sent to any server.

Extract a substring from text by position and length. Supports multi-line and reverse. Runs entirely in your browser.

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