NT Nano TextUtils
Ctrl K
● Text Manipulation

Substring & String Slicer

Surgically extract a specific portion of your text. Define a 'Start Index' and an 'End Index' (or length) to slice out exactly what you need. Useful for extracting fixed-width data fields, getting the first N characters of a paragraph, or parsing codes from a long string.

Your text never leaves your browser. Everything is processed locally.

Enter your content

Substring/Extract Fragment

Extract portions of text

Input Text

0 characters, 0 words

Output Text

0 characters, 0 words
How this tool works Documentation & SEO

Surgically extract a specific portion of your text. Define a 'Start Index' and an 'End Index' (or length) to slice out exactly what you need. Useful for extracting fixed-width data fields, getting the first N characters of a paragraph, or parsing codes from a long string.

Extract a specific part of text by index or length. Slice strings online with start/end positions. Developer substring tool.

Programmers testing string.substring() logic
Data Analysts parsing fixed-width files
QA Testers validating string lengths
Students learning 0-based indexing
Key features
  • Extract by Start/End Index
  • Extract by Length
  • 0-based indexing support
  • Real-time slice preview
  • Handles out-of-bounds gracefully
Frequently Asked Questions FAQ
What is 0-based indexing?
In programming, the first character is at position 0, not 1. So in 'Hello', 'H' is at 0, 'e' is at 1. This tool uses that standard.
Difference between Substring and Substr?
Substring usually takes (start, end) indices. Substr usually takes (start, length). This tool clarifies the difference visually.