Line counter
Line counter with local processing and strict input validation.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Text
Result
The result was generated locally.
Enter text to process
What this tool does
- Transform text locally.
- Process copied text without uploading data.
- Quickly count text lines to check content size.
Example
Input
a b
Output
2
All processing runs locally and invalid input is rejected explicitly.
Frequently asked questions
Is empty input supported?
Yes, it returns an empty result.
How is invalid input handled?
It returns an explicit invalid-input error.
How many lines does empty text have?
Empty input returns an empty result; non-empty text is counted by its line breaks.
Keywords：文本行数统计Line counterline-counttext encodinglocal tool