Free Domain Extractor that works offline
Create a clean hostname inventory from mixed notes, logs or exports. Optional normalization removes the common www prefix and repeated values.
What this domain extractor does
URLs contain schemes, paths and query strings, while emails place the domain after @. Reducing these values to hostnames makes comparisons and inventories easier.
How to use the Domain Extractor
- Enter or paste text containing URLs, email addresses or domain names into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Extract domains and review one normalized hostname per line before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Building a domain inventory from a link list
- Reviewing third-party hosts in copied source
- Cleaning email-domain reports
- Preparing allowlist candidates for manual review
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Extraction does not prove that a domain exists.
- Subdomains remain separate unless you normalize them manually.
- Use the URL parser when paths and query values also matter.
Frequently asked questions
Does this tool upload my data?
No. Domain Extractor processes its input in the current browser and does not submit it to a conversion API.
What input does the Domain Extractor accept?
HTTP URLs, email domains and common dotted hostnames are recognized. The tool does not perform DNS lookups or confirm ownership.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.