Code Signing Certificates

For Companies and Independent Developers

If you find a lower published price for a comparable code signing certificate we will beat it if you email us. Check out our great prices on web server SSL certificates too!

ONE code signing certificate for ALL of these platforms!


  • Code Signing Certificates for Windows 8
  • Code Signing for Microsoft Authenticode

    Microsoft Authenticode - ALL versions of Windows Code Sign any Microsoft format (32 and 64 bit) EXE, DLL, OCX, MSI, CAB.

  • Code Signing for Adobe AIR

    Adobe AIR Code Sign any Adobe AIR application.

  • Code Signing for Java

    Java Code Sign any JAR applet

  • Code Signing for Microsoft Office

    Microsoft Office Code Sign any MS Office Macro or VBA (Visual Basic for Applications) file.

  • icon

    Mozilla Code Sign any Mozilla Object file.

  • Code Signing for Silverlight

    Microsoft Silverlight Sign any Microsoft Silverlight application  or XAF file


  • Code Signing for Drivers

    Driver Signing Sign ANY Windows Driver -- no extra cost.


As of late August 2013, all valid (not expired, not revoked) Comodo Code Signing Certificates can be used for Kernel-Mode Code Signing!!! (For Windows Vista and greater)

  1. Download the Comodo cross-signed CA that matches your Code Signing certificate's Root CA.

  2. Open an elevated Windows command prompt (cmd) and run signtool.exe :

    signtool.exe sign /v /ac "CROSS_SIGNED_COMODO_CA_HERE" /f YOUR_PFX_HERE /tr http://timestamp.comodoca.com/rfc3161 "FULL_PATH_TO_FILE_TO_SIGN"

    Example: signtool.exe /v /ac "AddTrustExternalCARoot_kmod.crt" /f my.pfx /tr http://timestamp.comodoca.com/rfc3161 "C:\myfile.dll"

Note: For most customers CROSS_SIGNED_COMODO_CA_HERE will be:

[KMCS] AddTrust External CA Root
OR
[KMCS] UTN-USERFirst-Object .

For more general information and instruction about kernel mode signing certificates, see Microsoft's Kernel-Mode Code Signing Walkthrough . (MSDN.microsoft.com)

Renewing? No problem!

You can order a new code signing certificate through K Software and take advantage of our discounted price even if you've ordered from Comodo or any other CA in the past.

There is no special renewal process if you've purchased a certificate in the past. Place a new order using the same company information and the validation process should go much faster than your first order. All documentation is considered valid for 27 months. Even if you ordered outside that time frame your re-order will be faster. Be sure to quote your previous order number in any correspondence with Comodo.

The certificate period starts from the issuance date of your new certificate - any time left on your old certificate won't be added to the new one. Because of that it is a good idea to order your new certificate a few weeks in advance of your expiration date (we'll email you to remind you).

kSign - the Signtool.exe alternative for Code Signing

Free Code Signing Software

That's right, it's free. It does not require signtool.exe, signcode.exe or the download of ANY microsoft SDK.

kSign will sign any number of files with your code signing certificate and comes with everything you need - no SDK or additional downloads required. Best of all - it's FREE!

Click Here to Download kSign

Signtool.exe alternative for Code Signing
Click the screenshot for a full-size version.

Signtool.exe alternative for Code Signing
Click the screenshot for a full-size version.

kSign was written specifically for customers that have purchased code signing certificates through K Software. If you didn't purchase your certificate through K Software you can still use kSign for free but you'll be taken back to this website when the software signs a file.

Clear instructions, outstanding support, reasonable prices, and quick delivery. Compare to the other certificate vendors, which have... well, NONE of that!

David Hyde, Hydesoft Computing

As a repeat customer I can recommend K Software without hesitation - excellent customer service and great prices!

Jeff Moskow, Ready-to-Run Software

K Software's service is prompt and helpful. Code signing certificates are an important thing for software publishers, and I will continue to trust K Software as my source for this vital part of my business

Brandon Staggs, SwordSearcher Bible Software Read More Testimonials

Not Convinced you need a code signing certificate?


Run with no code signing certificate

no code signing
No Signature Means Unknown Publisher

Don't Scare Your Customers!


SmartScreen Run with no code signing certificate

Or With a Code Signing Certificate / Digital Signature :

Run with code signing certificate

no code signing
With a Code Signing Certificate &
Digital Signature - No Warnings!

Buy now!

*Company Name can be your personal name if you work as an independent developer.

SmartScreen Run with code signing certificate

A digital signature alone won't guarantee your software isn't flagged by SmartScreen, but signing helps ensure that your software's reputation can be recognized for everything you sign.

K Software, Computers Software & Services, Ashland, KY