FORMATTING
JSON formatter
Validate JSON, make it readable, or compact it for sharing.
CLOUDEK · FREE IT UTILITIES
Small tools for
everyday IT work.
Quick checks and helpers that run in this browser. No account needed. The mail DNS checker sends only the domain and record queries to Cloudflare when you request a lookup.
✓ No sign-in✓ DNS lookup is opt-in✓ No credential storage
SECURITY HELPER
Password generator
Create a random password locally. This tool does not save or manage it.
NETWORKING
IPv4 subnet calculator
Calculate the network range from an IPv4 address and CIDR prefix.
SYNTAX CHECKS
Domain, email & URL
Check common formatting rules only. These are not live delivery or availability tests.
Enter a value to check its format.
No DNS lookup, email delivery, ownership verification, or website connection is performed.
EMAIL DNS
Mail DNS checker
Look up published MX, SPF and DMARC records. Add a DKIM selector to query its public key record.
When you click Check DNS, the domain and selected record names are sent to Cloudflare’s public DNS resolver. DNS records are public.
Informational lookup only. It does not send test email, validate SPF’s full include chain, or verify a DKIM signature.
CERTIFICATE HELPER
Certificate date checker
Estimate time until a certificate’s stated expiry date.
This checks a date you provide; it does not inspect a website certificate.
Does not check certificate chain, hostname, revocation, or the live site.
USE WITH CARE
Helpful checks, clear limits.
These free utilities are designed for quick troubleshooting and learning. Confirm important results with your own tools and procedures before making changes.
Need IT support? Email our team ↗Learn about Cloudek services ↗Except for the user-triggered mail DNS lookup described above, tools execute locally in your browser. DNS queries go to Cloudflare’s public resolver, not Cloudek. Do not paste customer secrets or credentials into shared devices. Results are informational and may not cover every configuration or edge case.