WHOIS Lookup
Look up domain registration details via RDAP.
- On your device
- No signup
Online lookup
This tool looks up information online. Results may be incomplete or slow during busy times.
Look up domain registration details via RDAP.
Check certificate transparency records for a domain.
Inspect HTTP response headers for a URL.
Format, minify, and validate JSON with optional key sorting.
Compare two JSON documents and list structural differences.
Format, minify, and validate XML with readable indentation.
Compare two XML documents and list structural differences.
Encode and decode text with Base64.
Enter a domain to fetch common DNS records (A, AAAA, CNAME, MX, TXT, NS) using a public DNS lookup from your browser.
1. Enter the domain, IP, ZIP code, or URL requested by DNS Lookup. 2. Click the lookup or check button. 3. Wait for the external service response. 4. Review the formatted results table or details. 5. Copy values you need—do not query sensitive internal hosts. This tool uses an online lookup—see the privacy note for what is sent.
Example: paste a small sample input into DNS Lookup, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
Enter a domain to look up common DNS records (A, AAAA, CNAME, MX, TXT, NS). The domain you enter is looked up through a public directory when you run a search.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
This tool looks up information online. Results may be incomplete or slow during busy times.
FAQ
Yes. It is free to use and you do not need to sign in or create an account.
See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.
Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.
This tool is one step in a longer job. Jump straight to your step or open the full workflow guide.
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