Collapse blank lines
Collapse blank lines 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
- Clean and normalize text locally.
- Process copied text without uploading data.
- Get a result ready to copy.
Example
Input
a b
Output
a b
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?
An explicit invalid-input or invalid-options error is returned.
Is data uploaded?
No, processing runs locally in the browser.
Keywords：多空行只保留一个Collapse blank linestext cleaninglocal tool