How to open a sig file?

Ways to Open a Sig File

To open a Signature File, you can use regular programs installed on your computer or online services with the necessary functionality. Let's start with programs, which you can download from our portal or the official developer's website.

Windows Notepad

The easiest way to open a sig file is to use the standard Windows Notepad. The only downside to this solution is that all encrypted information will be in an unreadable format, and after saving, the file will no longer be openable by specialized software.

To open it, press the “Win + R” combination and enter “notepad” without quotes in the field. Click on the “File” tab, then “Open”, and browse for the file on your computer. Select it and click the “Open” button.

Microsoft Outlook

A mail client with organizer functions (calendar, scheduler, address book, etc.) by Microsoft. It supports working with files from the Microsoft Office suite. It allows you to open and view the contents of sig files. In many versions of Windows, Outlook is pre-installed, but if necessary, you can install it manually on your computer, Android, or iOS.

To open a file with the ".sig" extension, you will need to:

1. Log in to Outlook using a Microsoft account or a Gmail email.
2. Navigate to the folder where the sig file is located.
3. Right-click on the file and click on “Open”.
4. In the window, select “Continue to use Outlook”.

If desired, you can directly access the program's client, click on the “File” tab, then “Open”, and select the file from the desired location on the hard drive.

KryptoPro CSP

A cryptographic utility or cryptographic provider used for creating electronic signatures, security certificates, etc. Its main area of ​​application is tax document flow and the banking sector. It is included in the KryptoPro 5.0 package, so there is no need to download it separately. When opening a sig file, the certificate of the signature verification key must be loaded onto the server.

To open a sig file, you will need to:

1. Go to the folder where the sig file with the digital signature is located.
2. Right-click on the file and select “Crypto+DE”, then verify the electronic signature.
3. The information from the file will be displayed in the lower right corner of the screen.

To open a file from the program, you need to open it from the “Start” menu. In the right part of the program, select “Signature verification”, and in the left part, “Select a file with a signature for verification”. Then, find the folder with the file and open it. Finally, click the “Verify signature” button.

KryptoARM

A universal program for creating/verifying electronic signatures. It is used to protect confidential corporate and personal information intended for transmission via the Internet or portable media.

To open a sig file, you need to:

• Download and install the program.
• Restart your computer before the first launch.
• Open the program, go to the “File” tab, and select “View Document”.
• Click “Next”, the “Add File” button, or “Add Folder” (for multiple files).
• Open the folder with the sig file and click the “Open” button.
• Click “Next” and follow the on-screen instructions.

Mozilla Thunderbird

A free cross-platform email program for working with email and news. It allows you to work with many types of electronic documents, including files in the form of ".sig" and ".xml". To do this, you need to download the program from our website or the official website and install it, following the on-screen instructions.

To open a sig file using Thunderbird, you need to:

1. Launch and log in to the program.
2. Click on the profile name with the left mouse button and select “View Account Profile”.
3. In the right part, find the “Insert Signature from File...” option, check it, and click “Choose” to add the file with the digital signature.
4. Confirm the action by clicking the “OK” button.
5. After that, click “Create”, then “Message”.
6. The editor window with information from the sig file will open.

Filext

A free online reference guide that allows you to view the contents of files of various formats. The service has been operating for over 20 years, and its user base exceeds 50 million people. The service is not suitable for full opening of sig files, but it can be used to recognize the file type and then download the necessary program or utility to open it.

To use the service, go to “Filext.com”. On the homepage, you will find the “Choose File” button - click on it and proceed to select the file. Alternatively, you can simply drag the file into the area around the button. After that, the service will show you what the file contains. For example, in the image above, you can see what will be displayed when opening a file with an electronic digital signature.

Fileinfo

A free utility in Russian that allows you to identify the file type and obtain basic information about it. Based on this, a program for opening the file will be suggested. Fileinfo is largely analogous to the Filext.com service, with the difference being that you need to install it on your computer. Fileinfo cannot open a file with the ".sig" extension, but the program will provide a brief description and a list of programs for opening it.

You can download the program from our portal. After launching it, you need to drag the file into the field indicated by a dotted line. After a few seconds, Fileinfo will analyze the contents. The left side will display information about the loaded file, and the right side will show a list of programs for working with it.

Rosreestr

The official online portal of the Federal Service for State Registration, Cadastre, and Cartography. The portal's website has a specialized module that allows you to view files with the extension ".xml" along with detached digital signatures in the form of sig files. It is not possible to open the signature itself, but the service will verify its authenticity.

To use the service, you need to:

1. Go to the following address - “https://rosreestr.gov.ru/wps/portal/cc_vizualisation”.
2. Next to the “Электронный документ (xml-файл)” item, click “Выбрать файл” and specify the xml file.
3. To check the authenticity of the signature, click the corresponding button next to the “Цифровая подпись (sig-файл)” item.
4. Enter the content from the image and click the “Проверить” button.

As a result, just below and to the right of the “Электронный документ (xml-файл)” item, a link “Показать в человекочитаемом формате” (Show in a human-readable format) will appear. Click it to view the contents in a new window/tab. The file can be saved or printed.

If the signature is not qualified, the service will display an error message like “Проверку цифровой подписи не удалось выполнить в ...”. The sig file itself will not open.

Gosuslugi

A Russian online reference information service aimed at providing individuals and legal entities access to services provided by the state and municipalities. The service was launched in late 2009, and as of the end of 2020, the user base exceeds 125 million people.

Gosuslugi allows you to verify the authenticity of a file for which an electronic signature was used. Additionally, you can view its contents, as well as the time and date of changes. However, it is not possible to open a sig file using this service.

To verify a file, you need to:

• Go to the following address - “https://www.gosuslugi.ru/eds”.
• In the “Электронный документ, подлинность подписи которого нужно проверить” item, click “загрузить вручную” (upload manually) and select the file or drag it into the field indicated by a dotted line.
• In the “Файл, содержащий отсоединённую электронную подпись в формате .sig” item, do the same but for the file with the digital signature.
• If the signature of the verified file was not qualified, the service will display an error message like “Не удалось проверить подлинность документа” (Could not verify the authenticity of the document).

Broderbund Sign File

In some cases, sig files may contain graphical information in the form of Broderbund raster graphics instead of text and a digital signature. Currently, this format is not widely used, primarily in products from the eponymous company for use in PrintMaster 2012 or The Print Shop programs. Accordingly, they can be used to open it.