Remove Duplicates

Duplicates, gone.

Unique lines only.

Input
Output
0 lines → 0 unique
No upload
Works offline
No tracking

Need text deduplication offline? The offline bundle handles unlimited text with no limits. $49 once.

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// How it works

Three steps. Zero uploads.

01
Paste
Paste text with duplicate lines. It stays on your device.
02
Deduplicate
Duplicate lines are removed instantly. Configure case sensitivity and whitespace handling.
03
Copy
Copy or download the unique lines. Nothing was ever uploaded.
// Why this is different

Your text never leaves your machine.

Most online deduplication tools send your text to a server.

fwip works differently. The deduplication engine runs entirely in your browser. Your text is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

// Questions

Frequently asked.

How are duplicates detected?▾
Each line is compared to all previous lines. The first occurrence is kept and subsequent duplicates are removed.
Is the comparison case sensitive?▾
By default no — "Hello" and "hello" are treated as duplicates. Toggle "Case sensitive" to treat them differently.
Does this preserve the order?▾
Yes. Lines appear in the same order as the original, with duplicates removed. The first occurrence of each unique line is kept.
What about leading/trailing whitespace?▾
With "Trim whitespace" enabled (default), leading and trailing spaces are stripped before comparison.
Can I remove empty lines too?▾
Yes. The "Remove empty lines" toggle (on by default) strips blank lines from the output.
// Related tools

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