SEO Report Tools

Content & Text · Runs in your browser · Free

Duplicate Line Remover

Remove duplicate lines from a list, keeping the first occurrence of each and the original order.

What this tool does

Cleans keyword lists, URL lists and exports by deleting repeated lines while preserving the order of first appearance, and reports how many were removed.

Who should use it

SEOs merging keyword exports, webmasters deduplicating URL lists, and anyone cleaning copied data.

How it works

Each line is optionally trimmed and lower-cased to form a comparison key; a set records keys already seen, and only the first line for each key is kept.

How to use it

  1. Enter or paste lines in the form.
  2. Adjust the options below the main box if you need to; the defaults suit most cases. Use "Load example" to see how input should look.
  3. Press the run button. Processing happens instantly in your browser.
  4. Review the result panel, then copy or download the output if the tool offers it. Use Reset to start over.

Practical example

The lines "Blue Widget", "blue widget" and "Red Widget" become "Blue Widget" and "Red Widget" with case-insensitive matching.

Understanding the results

The summary shows lines checked, unique lines kept and duplicates removed. The output is ready to copy or download.

Limitations

Only exact duplicates (after trimming and optional case folding) are removed; near-duplicates and plurals are kept.

Accuracy and report transparency

Results are computed in your browser from exactly what you enter. Deterministic steps (counting, parsing, encoding, validation) are verified by an automated test-suite with known answers. Where a method is a heuristic, the result panel says "estimated". No external data is used and nothing is invented.

Privacy

Your input never leaves your device for this tool. We count anonymous events (tool opened, run, copied) without storing what you typed. See the Privacy Policy.

Try these next

Text Line SorterSort lines alphabetically, naturally, by length or by number, or reverse their order.Bulk URL CleanerNormalise a list of URLs: force HTTPS, strip tracking parameters and fragments, de-duplicate and sort.Keyword Cluster GrouperGroup a keyword list into clusters based on shared meaningful words.

Frequently asked questions

Is the original order preserved?

Yes. The first occurrence of every line stays where it was.

Is my data sent to your server?

No. This tool runs entirely in your browser, so the text or files you enter stay on your device. We do record anonymous counts of how often each tool is opened or run (no input data) to see which tools are useful.

How accurate are the results?

Counting, parsing, encoding and validation steps are deterministic and covered by automated tests with known answers. Anything based on a heuristic is labelled "estimated" in the result panel.

Is this tool really free?

Yes. There is no account, limit or paid plan. The site is supported by advertising, which is disclosed on our Advertising Disclosure page.

References