How do I collect sub-domains?
To collect sub-domains, paste your list of URLs or domain strings into the input area and click “Collect Sub-domains.” The tool extracts every sub-domain segment, removes duplicates, and displays a cleaned list.
Collect Sub-Domains
Get only sub from domains
Input lines: 0 | Duplicate lines:
0 | Output lines: 0
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Collect Subdomains from Domains
Automatically extract sub-domain segments from a list of URLs or domain entries. Paste your data and get a clean, unique list of sub-domains instantly, entirely in your browser.
What are the steps to get sub-domains?
- Paste your list of domain names or URLs into the input box.
- Click the “Collect Sub-domains” button to start processing.
- View the statistics: total input lines, duplicates removed, and final sub-domains collected.
- Copy or download your cleaned sub-domain list for use elsewhere.
Why use a Collect Sub-Domains tool?
This tool helps transform raw domain lists into focused sub-domain lists by automatically extracting relevant sub-domain parts and removing duplicates. It saves time over manual parsing and ensures structured output.
- Effortless extraction: Pull only sub-domain parts from full URLs or domains.
- Accurate deduplication: Avoid redundant sub-domains in your final list.
- Time-saving: Instant processing without manual editing or scripting.
Who Is This Tool For?
Designed for collecting and organizing sub-domains efficiently.
- Penetration Testers: Gathering reconnaissance data.
- SEO Professionals: Discovering sub-domains for analysis.
- System Administrators: Auditing domain structures.
Tips for better results
Improve accuracy and usability of your output:
- Place each domain or URL on its own line for correct extraction.
- Combine with tools like Clean Sub-Domains or Sort Text Lines to refine lists further.
- Review the final stats to confirm how many sub-domains were collected and filtered.
Frequently Asked Questions
What does the Collect Sub-Domains tool do?
It scans each line of your input and automatically extracts the sub-domain portion of each entry, removes duplicates, and shows a clean list of sub-domains.
How do I collect sub-domains online?
Paste your URLs or domain list, click “Collect Sub-domains,” and the tool instantly displays counts and your cleaned output—ready to copy or download.
Is my data safe?
Yes. All processing happens in your browser—your input is never uploaded to external servers.
What format works best?
Plain text with one URL or domain per line gives the best extraction accuracy.
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