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Create self-signed SSL certificates online

how to make certificates online This free online service creates the following:
  • Certificate Signing Request (CSR)
  • Self-signed SSL certificate (CER)
  • Private key
  • Private key values:
    • Prime number: p
    • Prime number: q
    • Modulus: n=p*q
    • Public exponent: e
    • Private exponent: d=e -1 mod phi
    • Chinese Remainder Theorem (CRT) exponent 1: dP=d mod (p-1)
    • Chinese Remainder Theorem (CRT) exponent 2: dQ=d mod (q-1)
    • Chinese Remainder Theorem (CRT) coefficient: qInv=q -1 mod p
  • Public key
  • Personal Information Exchange PKCS#12 (.P12)
The certificate and private key can be installed on your web server which will provide data encryption.

More information can be found in the tutorial Installing Apache 2 and SSL on Windows XP.

To verify if the generated SSL certificate contains the correct information, use the online decode SSL certificate tool.

WARNING: Self-signed SSL certificates should not be used for public use!

Browsers will show warning messages telling that the certificate is not issued by a recognized authority.

These certificates can be used for test purposes or to setup a secure intranet connection.

This tool can also create wildcard self-signed SSL certificates. These certificates will protect multiple subdomains (e.g. if issued for *, it would protect,,, etc. - but not itself).

Here below are several examples for the Common Name:
  • mobilefish.intranet
  • sevenofnine.theborg
  • *
  • *.*.com
  • *.com
  • localhost
  • Tony Stark
All cryptography related services on this website:
  • .htpasswd and .htaccess generator
Generates .htpasswd and .htaccess files to protect a directory from unauthorized access on your website.
  • Base64 encoder and decoder Base64 encode or decode a given text or a file.
  • Big number bitwise calculation Perform bitwise AND, bitwise OR and bitwise XOR (bitwise exclusive or) operations on two big positive integer numbers.
  • Big number converter Convert big positive integer numbers into binary, decimal, hexadecimal or base64 encoding schemes.
  • Big number equation calculation Add (+), subtract (-), mutiply (*), calculate the modulo (%), calculate the power (^) or calculate the greatest common divisor (gcd) of very large

    positive integer numbers.

  • Convert ISO Latin 1, UTF-8, UTF-16, UTF-16LE or Base64 text to hex and vice versa Convert ISO Latin 1, UTF-8, UTF-16, UTF-16LE or Base64 text to a hexadecimal value and vice versa.
  • Create self-signed SSL certificates online Create Certificate Signing Request (CSR), Self-signed SSL certificate (CER), Private key, Public key and Personal Information Exchange PKCS#12 online.
  • Cryptographic Pseudorandom Number Generator Generate small to large cryptographic pseudorandom numbers by specifying its bytesize.
  • CVS pserver password decoder and encoder Recover CVS pserver passwords or create encoded CVS pserver passwords to be used in the .cvspass file.
  • Decode Certificate Signing Request (CSR) Decodes your Certificate Signing Request (CSR) and verifies that your Certificate Signing Request is valid and displays the information held in the CSR
  • Decode SSL certificate Decode x509 SSL certificate and verifies the certificate is valid. Displays the information held in the SSL certificate, such as subject name, issuer name, purposes, valid from and valid to dates etc.
  • File checksum calculator Enter a message and generate MD5, SHA1, SHA224, SHA256, SHA384, SHA512 or RIPEMD160 hashes.
  • Online eval gzinflate base64_decode decoder Decodes PHP files encoded by nested functions, for example: eval(gzinflate(base64_decode('Code')))
  • One-time pad encoder/decoder and key generator One-time pad encoder/decoder and generates multiple one-time pads.
  • Online GUID generator GUID generator creates a unique character number/letter combinations, such as .
  • Online hex editor Online hex editor allows you to edit, view, modify and analyze binary files.
  • Online RSA key generation Create an RSA key pair consisting of an RSA public key and an RSA private key.
  • Online steganography service, hide message or file inside an image Hide secret information inside an image where nobody would suspect it contains hidden information inside of it.
  • Private key match the certificate Checks if a given private key corresponds to a certificate (cer).
  • Rot13 (rot-n) encoder decoder Encrypt or decrypt text with a ROT13 cipher and allows you to shift each letter 1 (ROT1) to 25 (ROT25) places along the alphabet.
  • Unicode character map

    Display all unicode characters, symbol and punctuation maps. You can also display a character by entering its character code or vice versa.

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    Category: Insurance

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