How do I clean sub-domains?
Paste your raw sub-domain list into the input box and click “Clean Sub-domains.” The tool removes duplicates and unnecessary entries, then shows you the cleaned list instantly.
Clean Sub-Domains
Remove sub from domains
Extensions List
Input lines: 0 | Duplicate lines:
0 | Output lines: 0
Details
Related Tools
Clean and Normalize Subdomains
Quickly remove duplicate and unnecessary sub-domain entries from your list. This tool cleans sub-domain lists instantly in your browser with zero uploads required.
What are the steps to clean my sub-domain list?
- Paste your list of sub-domains into the tool’s input box.
- Click the “Clean Sub-domains” button to start processing.
- Review the results, including total lines and duplicates removed.
- Copy or download your clean, unique sub-domain list.
You’ll see counts for input lines, removed duplicates, and final results right after processing.
Why use a Clean Sub-domains tool?
Cleaning sub-domain lists helps streamline workflows by removing noise and redundancies, making your data easier to use for analysis, testing, security scanning, or other automation tasks.
- Remove duplicates to avoid repeated entries.
- Improve accuracy by ensuring each sub-domain is unique.
- Save time over manual cleanup and editing.
Who Is This Tool For?
This tool is ideal for anyone who needs clean, valid sub-domain lists.
- SEO Specialists: Cleaning sub-domain lists before audits or scans.
- Security Researchers: Preparing targets for reconnaissance.
- Developers: Normalizing sub-domains for scripts and automation.
Tips for best results
To get the most accurate cleanup:
- Use plain text with one sub-domain per line.
- Combine with other tools like “Remove Duplicate Lines” or “Sort Text Lines” if needed.
- Use as a preprocessing step before further analysis or scanning workflows.
Frequently Asked Questions
What does the Clean Sub-domains tool do?
It removes duplicate and unnecessary sub-domain entries, leaving you with only unique, clean lines.
How do I clean sub-domains online?
Paste your sub-domain list, click “Clean Sub-domains,” and the tool processes your data to show the cleaned list along with counts of duplicates removed.
Is this tool safe to use?
Yes. All processing happens locally in your browser—your data is not uploaded or stored anywhere.
What formats work best?
Plain text sub-domain lists with one entry per line work best for reliable cleanup.
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