Less repetition. More clarity.
Delete Duplicate Lines Online is a collection of focused tools for cleaning everyday text.
Made for the work between the work
A copied list. An export with repeated rows. Notes full of blank lines. These small cleanup tasks should not need a spreadsheet formula, a script, or a new account. This website brings the essential controls together in one place.
Your browser does the processing
The tools run on your device. Text and uploaded files are processed locally, and the application does not store your work in browser storage. A separate browser worker handles processing so larger jobs do not compete directly with page interactions.
A tool for each task
- Remove duplicate lines with first, last, and single-occurrence modes.
- Inspect a repeated-line report to see what occurs more than once.
- Remove empty lines while keeping repeated content.
- Sort text alphabetically or in natural numeric order.
- Join lines with a separator of your choice.
Clear limits, useful defaults
These are plain-text tools, not full spreadsheet or CSV parsers. Uploads are limited to 10 MB, and device memory affects how quickly a large list can be processed. The goal is a dependable, understandable experience, with no unnecessary setup.
Read the privacy policy for details about local processing and website hosting.