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Free online encryption tools

If you are anything like us you can't remember what OpenSSL commands to type at the prompt or you're just too lazy to do so. Or maybe OpenSSL is just not available at the time when you need it most. In that case you've come to the right place. We a offer free web based front end that allows you to copy and paste many common encryption and related functions, that you would normally perform at the OpenSSL command line.


Got an X.509 certificate or an X.509 Certificate Signing Request (CSR) and you want to know if it is valid and what it is all about? Certificates and CSRs are often transported using the PEM format which cannot be read by (normal) humans. But if you just paste it into the X.509 section here you can quickly ascertain the attributes.

Many developers need quick and dirty tools to bug fix their code or deploy on non-production platforms. The X.509 section also offers capabilities to create self-signed certificates which can be used for testing and development purposes. If you really need production level security to protect your assets or secure your communication, then of course you should generate your private keys in a secure environment and have your certificates signed by a reputable Certificate Authority (CA).


Need a public / private key pair to test some code or set up a temporary secure channel? The encryption section allows you to create either an RSA or DSA key pair with a single mouse click. Of course you should be aware that keys generated on this web site are transported to you over the internet in clear text. Therefore for serious encryption applications these keys should be considered compromised from the start.


Base64 encoding is used to encode any bytestream into human readable and printer representable characters. Base64 is typically used all around us, for example email attachments are usually encoded using Base64. As a visitor of this site you know this already. The Base64 section allows you to quickly type or paste a string and instantly incode it into Base64 or decode a Base64 snippet back into it's original bytestream.


The Multipurpose Internet Mail Extensions (MIME) is an Internet standard that extends the format of email. At its core internet email only supports 7-bit ASCII characters. This effectively limits Internet email to plain text messages in the Latin alphabet. Enter MIME. MIME enables the transport of email in many languages in many character sets as well as attaching documents like images. Virtually all Internet email is transmitted via SMTP in MIME format. MIME is specified in six linked RFCs: RFC 2045, RFC 2046, RFC 2047, RFC 4288, RFC 4289 and RFC 2077, which together define the specifications.

A multipart/signed message allows a digital signature to be attached to an email message. Common signatures are application/pgp-signature and application/x-pkcs7-signature(S/MIME).

A multipart/encrypted message allows a message to be sent confidentially. The first part of such a message contains the information needed to encrypt the message, typically a reference to the receiver's private key.