💡 Features
- Sorting – ascending (A→Z) or descending (Z→A) with full Unicode support.
- Randomize – shuffle lines randomly, reverse entire order.
- Deduplication – remove duplicate lines while preserving first occurrence.
- Trimming & cleaning – trim whitespace from each line, remove completely empty lines.
- Case conversion – UPPERCASE, lowercase, Title Case (every word capitalised).
- Filtering – keep only lines containing (or excluding) a given substring.
- Prefix / Suffix – add custom text to the beginning or end of each line.
- Joining – merge all lines into one using any separator (comma, space, newline…).
- Splitting – break each line by a delimiter and expand into multiple lines.
- Line numbering – add sequential numbers to each row.
All operations are applied instantly and displayed in the output panel. You can copy results, export as plain text, or reset the input from the output for chained transformations.
❓ How to use groups
Is my data safe?
Absolutely. Everything runs locally in your browser. No file uploads, no external APIs.
Can I process large files?
Yes, but extremely large inputs (100k+ lines) may slow down your browser due to JavaScript memory limits. For typical text files (<10 MB) it’s lightning fast.
How do I preserve empty lines?
In the Advanced Parameters section, uncheck “Preserve empty lines”. By default empty lines are ignored in most operations (except split/join) to keep results clean.
What’s the difference between “Filter include” and “Filter exclude”?
*Include* keeps only lines that contain the exact substring you type. *Exclude* removes lines that contain that substring.
Can I chain multiple operations?
Yes. Apply one operation, then click “Reset input from output” to move the result back to the input area, then apply another operation.
Does the split operation remove the original delimiter?
Yes. It splits each line by the delimiter you provide (e.g., comma) and outputs each piece on a new line. The original line disappears.
What keyboard shortcuts are available?
Press `Ctrl+Enter` (or `Cmd+Enter` on Mac) to re‑apply the currently selected operation.
Can I export the output as something else than .txt?
The export creates a standard `.txt` file, but you can rename it to `.csv` or any other extension if your content is structured.