Sort lines in any text file alphabetically, numerically, by length, or randomly — instantly in your browser. No upload. No login.
Need to sort lines in a text file alphabetically, numerically, or by length? The Flipper File Line Sorter handles it all in seconds — paste your text or upload a file, pick your sort mode, and download the sorted result instantly. Everything runs in your browser with no upload, no account, and no waiting.
How to Sort Text Lines Online
- Paste your text into the input box, or click Choose File to upload a
.txtfile. - Choose your sort mode: A→Z, Z→A, Numerical, By Length, or Random Shuffle.
- Toggle any options you need: case-insensitive, remove duplicates, or ignore blank lines.
- Click Sort Lines — the result appears instantly in the output box.
- Click Copy to copy to your clipboard, or Download to save the sorted file.
Why Use Flipper File to Sort Text Lines?
- Four sort modes — alphabetical (A→Z and Z→A), numerical, by line length, and random shuffle, all in one tool.
- Smart deduplication — optionally remove duplicate lines as part of the sort, so you get a clean unique list.
- Case-insensitive option — sort "Apple" and "apple" as equal so capitalization doesn't scramble your output.
- Ignore blank lines — filter out empty lines so they don't float to the top or bottom of your result.
- Paste or upload — works with text pasted directly or .txt files up to any size.
- 100% browser-based — your text never leaves your device; no server, no account, no limits.
Frequently Asked Questions
Can I sort a .txt file without uploading it to a server?
Yes. This tool uses the JavaScript File API to read your file directly in your browser. Nothing is sent to any server — your text stays completely private on your device.
What's the difference between alphabetical and numerical sort?
Alphabetical sort treats all values as text, so "10" comes before "2" (because "1" < "2" alphabetically). Numerical sort reads the leading number in each line and sorts by its actual value, so "2" comes before "10". Use numerical sort whenever your lines start with numbers.
What does "case-insensitive" mean?
With case-insensitive sort turned on, "Apple", "apple", and "APPLE" are treated as identical for ordering purposes. Without it, uppercase letters sort before lowercase (so "Banana" comes before "apple").
Can I remove duplicate lines at the same time as sorting?
Yes — just check the "Remove duplicates" option before clicking Sort. The tool deduplicates and sorts in one step. Comparison respects your case-insensitive setting, so "Apple" and "apple" count as duplicates if case-insensitive is on.
What does "Random Shuffle" do?
It randomizes the order of your lines completely — useful for creating randomized lists, picking random items from a list, or anonymizing ordered data before sharing.
Does the tool work on large files?
Yes. All processing happens in your browser using JavaScript, so it's limited only by your device's memory rather than any server-side restriction. Most .txt files, even large ones with tens of thousands of lines, process in under a second.
Can I sort CSV or other file types?
The tool works on any plain-text file where each row is a line — CSV, TSV, log files, code, whatever. Just note that it sorts entire lines as units; it won't sort by a specific column inside a CSV.
Is there a line limit?
No. There's no artificial line limit — the tool will sort as many lines as your browser can handle.