About this tool
Work with long text like a command line: keep the first or last N lines, a range, every Nth line, lines that contain or match a pattern, by length, non-empty lines, or cut out fields.
Lines are processed one by one with the chosen rule; regular expressions run in a background task with a time limit, and “cut” splits each line by the separator and keeps the listed fields.
Example: keep lines containing “ERROR” → 2 of 5 lines.
Handy for log files: open a .log or .txt file and keep only the lines with “ERROR”.
Quick steps
- Paste your text or open a file (or press Try an example).
- Choose the options — the result updates as you type.
- Copy the result or download it as a file.
Everything runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Filter Lines (grep, head, tail, cut) work?
Lines are processed one by one with the chosen rule; regular expressions run in a background task with a time limit, and “cut” splits each line by the separator and keeps the listed fields.
What should I keep in mind?
Handy for log files: open a .log or .txt file and keep only the lines with “ERROR”.
Is my text uploaded or saved?
No. It is processed on your device in a separate background task that is stopped if it takes too long; nothing is stored or sent.