Remove Duplicate Lines from Log Files
Log files frequently contain repeated error messages, status updates, and heartbeat entries. Paste your log output here to strip duplicates and see only unique log entries.
How to do this
Copy log output from your terminal or log viewer
Paste into the input
Run to remove duplicate entries
Review unique log lines
Paste text below and run the tool. Everything runs locally in your browser. No data is stored.
Remove Duplicate Lines
Paste text with duplicate lines and instantly get a deduplicated version. Useful for cleaning lists, log files, CSV data, and any text where repetition needs to be eliminated.
Example
Input
apple banana apple cherry banana
Output
apple banana cherry
How Remove Duplicate Lines Works
Paste text with duplicate lines and instantly get a deduplicated version. Useful for cleaning lists, log files, CSV data, and any text where repetition needs to be eliminated.
This tool runs entirely in your browser — no data is sent to any server. Paste your text, click Run, and get your result instantly. You can also chain this tool with others using the pipeline feature: run Remove Duplicate Lines, then continue with a related tool to build a multi-step text workflow.
Related Tools
TextRefinery is a free, open-source text processing toolkit. Learn more about regular expressions and text processing on the web.
Example: Remove Duplicate Lines from Log Files
Input
[ERROR] Connection refused [INFO] Heartbeat OK [ERROR] Connection refused [ERROR] Connection refused [INFO] Heartbeat OK [WARN] Disk usage 85%
Output
[ERROR] Connection refused [INFO] Heartbeat OK [WARN] Disk usage 85%
Related Use Cases
Remove Duplicate Lines from PDF Text
Clean up duplicate lines that appear when copying text from PDF documents.
Remove Duplicate Lines from CSV Data
Eliminate duplicate rows from CSV exports and spreadsheet data.
Remove Duplicate Lines from Email Lists
Deduplicate email lists for newsletters, outreach campaigns, and contact management.
Remove Duplicate Lines from Spreadsheet Data
Clean duplicate entries from Excel or Google Sheets data pasted as text.