Text Line Deduplicator
The Text Line Deduplicator instantly cleans up any text file by removing repeated lines while preserving original order. Just upload your file, optionally enable case‑insensitive matching, and download a version with only unique lines. Ideal for sanitising logs, mailing lists, notes, or exported data – all done privately in your browser.
How to Use
- 1Click **“Upload”** and select a text file, or drag‑and‑drop it onto the dropzone.
- 2Toggle the **“Case‑insensitive”** checkbox if you want `Hello` and `hello` to count as duplicates.
- 3Click **“Remove Duplicates”** – the tool processes the file and immediately provides a **“Download”** button for the cleaned result.
Why use ShowPro's Text Line Deduplicator?
Frequently Asked Questions
What counts as a duplicate line?
Two lines are duplicates if their entire content matches exactly. With case‑insensitive mode on, the comparison ignores uppercase/lowercase differences. Trailing spaces and invisible characters are part of the line content, so `hello ` and `hello` would be considered different unless you trim the file first.
Will this tool work with CSV or JSON files?
Yes, it works with any plain‑text file. Each line is compared as a string, so a CSV line with different data won’t be removed unless the entire line matches a previous one. For structured files you might want to first deduplicate based on a specific field – but for simple line‑by‑line deduplication, it’s perfect.
What happens to blank lines?
Blank lines are treated like any other line content. The first blank line is kept; subsequent blank lines are removed. If your file ends with a newline, that trailing empty “line” is typically ignored (the output will not include an extra blank line at the end unless there were multiple consecutive blank lines in the original).