WHOIS Parser

Security analysts triaging a phishing domain, developers auditing a vendor before signing a contract, and registrars reviewing a transfer request all face the same wall. Raw WHOIS output is a wall of inconsistent key names and date formats, and reading it line by line during an incident is slow and error-prone.

Paste the raw WHOIS text you already have and this parser returns a clean summary of domain, registrar, creation and expiry dates, name servers, status flags, and a days-left count. It runs entirely in the tab, so registrant contact details in the raw text never leave the machine. 

 
 
 
   
  
 
 
Domain
 
—
 
 
 
Registrar
 
—
 
 
 
Created
 
—
 
 
 
Expires
 
—
 
 
 
Days left
 
—
 
 
 
Updated
 
—
 
 
 
DNSSEC
 
—
 
 
 
Registrant
 
—
 
 
 
 
 
Name servers
 
     
     
     
    Status flags
     
       
       
       
       Raw fields 
       
       
       
       
      How the parser reads WHOIS text
       
      
The parser splits the pasted text into lines and looks for a colon separator, the shape every WHOIS server uses. Each key is lowercased and collapsed to a single space, then matched against a table of common variations such as Registry Expiry Date, Expiration Date, and Expires On, all of which map to the same expiry slot. Comment lines starting with a percent sign or hash are skipped.

       
      
Name servers and status flags are collected as lists, deduplicated, and sorted so repeated lines from a verbose server do not clutter the output. Every key and value that was found, matched or not, is preserved under raw fields so unusual registrar formats still show their data.

       
      
If the text contains a no-match response such as No match for or NOT FOUND, the parser warns that the domain may not be registered instead of showing an empty summary. All of this runs in the tab with no network call.

       
       
       
      Before and after: a typical registrar response
       
      Input, a raw WHOIS block from a terminal:
       
      Domain Name: EXAMPLE.COM
Registrar: RESERVED-Internet Assigned Numbers Authority
Updated Date: 2024-08-14T07:01:34Z
Creation Date: 1995-08-14T04:00:00Z
Registry Expiry Date: 2025-08-13T04:00:00Z
Domain Status: clientTransferProhibited
Name Server: A.IANA-SERVERS.NET
Name Server: B.IANA-SERVERS.NET
DNSSEC: signedDelegation
       
      Output, the structured summary:
       
      Domain:      EXAMPLE.COM
Registrar:   RESERVED-Internet Assigned Numbers Authority
Created:     1995-08-14T04:00:00Z
Expires:     2025-08-13T04:00:00Z
Days left:   -428
Updated:     2024-08-14T07:01:34Z
Name servers:
  - a.iana-servers.net
  - b.iana-servers.net
Status:      clientTransferProhibited
DNSSEC:      signedDelegation
       
       
       
      Who parses WHOIS with this tool
       
       
       
      Developers
       
         
      • Check a vendor domain age and registrar before wiring an integration that sends user data.
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      • Parse a pasted WHOIS block into structured fields when building an internal domain audit script.
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      • Confirm name server changes propagated by comparing two pasted WHOIS snapshots side by side.
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      Production
       
         
      • Monitor domain expiry dates across a portfolio and flag anything inside a renewal window.
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      • Verify transfer-prohibited locks are set before approving a domain migration request.
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      • Document registrant organization changes during an acquisition or brand transfer.
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      Workflow
       
         
      • Capture WHOIS in a terminal, paste here for the summary, then pair with the certificate decoder for TLS fields.
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      • Use the days-left count as a renewal trigger in an internal checklist alongside the DNS lookup tool.
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      • Archive the raw fields panel output when documenting a domain for a compliance review.
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      Common mistakes when reading WHOIS output
       
         
      • Trusting the creation date as proof of legitimacy. A domain can be old and still host a phishing campaign, or newly registered and perfectly legitimate. Treat creation date as one signal among several, and pair it with certificate transparency and DNS history before drawing a conclusion.
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      • Ignoring privacy-redacted registrant fields. Many gTLD WHOIS responses replace registrant organization with a privacy service. An empty registrant field does not mean the owner is unknown, it means a proxy is in place. Check the raw fields panel for any residual data the summary missed.
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      • Reading the days-left count as exact. The count rounds up from the parsed timestamp and does not account for registrar grace periods or auto-renew behavior. Use it as a rough indicator and confirm the true renewal date in the registrar dashboard before letting a domain lapse.
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      • Assuming a no-match response means the domain is free. A No match response can also mean the registry rate-limited the query or the domain is a ccTLD with a different lookup path. Run the lookup again after a delay and cross-check with the DNS lookup tool before treating the name as available.
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      Best practices for WHOIS workflows
       
         
      • 1.Capture the full raw output in a terminal and paste it here, rather than copying a single field, so the parser can cross-check dates and name servers against each other.
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      • 2.Archive the raw fields panel alongside the summary when documenting a domain for audit, since unusual registrar keys only appear in the raw view.
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      • 3.Set a renewal reminder at least thirty days before the parsed expiry date, and confirm auto-renew is enabled in the registrar dashboard.
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      • 4.Pair the parse with the DNS lookup tool to confirm name servers resolve before and after a migration.
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      Frequently asked questions
       
       
       What does this WHOIS parser extract? 
      The tool reads raw WHOIS text you paste in and pulls out the fields that matter most for a domain audit: domain name, registrar, creation date, expiration date, last updated date, the list of name servers, registrant organization and country, DNSSEC status, and every domain status flag such as clientTransferProhibited. Any field that does not map to one of those slots is still preserved under raw fields so nothing is lost.
       
       Why does the parser not run a live WHOIS lookup? 
      Live lookups require a network call to a WHOIS server, which means the tool would need a backend and your query would be visible to third-party registries. Keeping the parser offline means you can paste output you already captured from a terminal, an email, or a registrar export, and the parse happens entirely in your browser. It also works with historic WHOIS dumps and registrar-specific formats that a live lookup might rate-limit.
       
       Why do some dates come back empty? 
      Every registrar formats WHOIS dates slightly differently. Some use ISO 8601 like 2024-08-14T07:01:34Z, others use a human string like 14-Aug-2024, and a few omit the field entirely. The parser matches the most common key names and takes the first non-empty value, but if the key or format is unusual the field stays empty and a warning is shown so you know to read the raw text yourself.
       
       What do the domain status flags mean? 
      Status flags are EPP client statuses set by the registrar. clientTransferProhibited blocks domain transfers to another registrar, clientUpdateProhibited blocks WHOIS updates, and clientDeleteProhibited blocks deletion. A domain in clientTransferProhibited is locked against theft but also cannot be moved until the lock is lifted. The parser lists every flag it finds so you can see the lock state at a glance.
       
       How is the days-left count calculated? 
      When an expiration date is found and parses as a valid timestamp, the tool computes the difference between that timestamp and the current time and rounds up to the nearest whole day. If the date string is not parseable the count is omitted rather than showing a wrong number. Always confirm the expiry against your registrar dashboard before relying on the count for a renewal decision.
       
       Does this tool send my WHOIS text to a server? 
      No. Parsing runs entirely in JavaScript inside your browser tab and the page makes no network request with your input. The text is discarded when the tab closes. You can disconnect from the internet after the page loads and the parser still works, which makes it safe to paste registrar emails or export files that contain registrant contact details.
       
       Can I parse other registry formats with this tool? 
      The parser is tolerant of common key variations across gTLD and ccTLD WHOIS servers, including name server lines written as Name Server, nserver, or nameserver. If a format is not recognized the raw fields panel still shows every key and value that was found, so you can copy the structured output or read the original text side by side. For certificate-level domain data, pair it with the certificate decoder tool.
       
       
       
       
       
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