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FQDN Converter
Converts a hostname into a canonical FQDN by applying an optional domain suffix and enforcing RFC-compliant formatting for DNS records.
Check It Yourself
About This Tool
The FQDN Converter constructs a fully qualified domain name from a given hostname by applying a user-specified suffix and enforcing RFC-compliant formatting. It normalizes case, validates per-label lengths, and ensures the final string conforms to DNS naming rules. It does not perform DNS lookups; its purpose is to produce a canonical string suitable for zone files, certificates, or data hygiene workflows. The tool supports optional IDN handling, enabling punycode conversion for Unicode inputs before suffix application. This makes it suitable for multilingual environments where hostnames must be stored or transmitted in a DNS-compatible form. Typical use cases include preparing DNS records, validating user-entered hostnames, or cleaning data imports prior to deployment. The unique value lies in precise RFC-aligned normalization, explicit length checks, and the ability to produce a trailing root dot when required, which helps ensure consistency across diverse DNS configurations.
How to Use
1. Provide inputs: host and optional suffix.
2. Configure options: trailing dot, IDN handling.
3. Run calculation to generate the FQDN.
4. Review outputs: canonical FQDN, validity status, and diagnostics if invalid.
5. Export or copy the result.
FAQs/Additional Resources
Find Quick Answers
What is an FQDN?
Should I always provide a suffix?
Does the tool perform DNS lookups?
International names?
User Reviews
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CEO of Company
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John Doe
CEO of Company
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John Doe
CEO of Company
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John Doe
CEO of Company
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John Doe
CEO of Company
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John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
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