Tools
Sixteen small tools for certificates, email and lookups. Most need no sign-in.
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Certificates
Certificate converterConvert between PEM, DER, P7B and PFX.Runs in your browser
Certificate decoderSee who a certificate is for, who issued it and when it expires.Runs in your browser
CSR decoderCheck a certificate request before you send it off.Runs in your browser
Certificate and key matcherCheck that a certificate, key and request belong together.Runs in your browser
SSL checkerCheck the certificate a server presents and how long it has left.Live lookup
Mail domain checkCheck a domain's mail servers, SPF, DKIM and DMARC.Live lookup
SPF and DMARC builderAnswer a few questions and get the DNS records to publish.Runs in your browser
Email header readerSee an email's route, delays and sender checks.Runs in your browser
Move your emailCopy your mailbox from your old mail server to the new one.Runs on our server
Lookups and more
DNS lookupSee the DNS records of a domain, or the name behind an IP address.Live lookup
Whois lookupFind the owner behind a domain, an IP address or an AS number.Live lookup
Who hosts it?See which company runs a domain's website, email and name servers.Live lookup
Password generatorFunny, memorable passwords made of small Norwegian sentences.Runs in your browser
One-time secretShare a password through a link that works once, then self-destructs.Encrypted in your browser
QR code makerTurn a link or a short text into a QR code.Runs in your browser
Short linksMake short tedn.es links for long web addresses.Runs on our server
No tool matches that. Try a shorter word, such as "mail" or "certificate".