Substring Extractor

Set the start position (1-based) and length. The tool extracts the matching portion of text and displays it as the result. For example, position 3 with length 4 from 'Hello World' returns 'llo '.

Position 1 refers to the first character of the text. This is different from programming languages like JavaScript or Python that use 0-based indexing, where position 0 is the first character.

In multi-line mode, each line is processed independently. The same start position and length are applied to every line separately, making it ideal for batch extraction from structured data.

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. Useful when you need to extract from the tail of a string.

Yes. All processing happens locally in your browser. No data is uploaded to any server. Your text remains completely private and secure.

It counts characters, not bytes. This means Unicode characters like emojis (🎉), accented letters (é), and CJK characters (中文) are each counted as one character.

If the start position is beyond the text length, the result will be empty. If the length extends beyond the text, only the available characters within range are extracted.

Yes. Enable reverse mode to count positions from the end. Position 1 in reverse mode is the last character of the text.

Common uses include extracting file extensions, parsing CSV columns, extracting domains from URLs, pulling specific fields from log entries, and processing structured text data.

Yes. Once the page is loaded, all processing is done locally in your browser. No internet connection is required for the extraction itself.