Prefix/Suffix Lines
Add literal text before and after every line while preserving line order.
Ready. Processing happens on your device.
Maximum 2 MB per text file. CSV limits: 20,000 rows and 200 columns. Drop one supported text file onto the input.
How to use Prefix/Suffix Lines
- Type or paste your input, open a supported local file, or try the example.
- Choose the available options and select Run tool.
- Review the output, then copy it or download it.
What to expect
Empty records are included. No escaping for programming languages is applied.
Common questions
Does Prefix/Suffix Lines send my input to a server?
No. Processing runs in a browser worker. Files are read locally and downloads are created on your device.
What if the result is empty or an error appears?
Check the input format and options. A filter or extraction may legitimately return no matches. Invalid formats show an explanation, and expensive operations stop after five seconds so you can revise the input.