Opening CACERTS Files

The CACERTS file type is primarily associated with Java Keytool.

CACERTS	File extension: CACERTS
	File type:	keystore file

What is a CACERTS file?

CACERTS files mostly belong to Java Keytool. A CACERTS file holds a set of trusted certificate authority (CA) certificates used by Java applications. It is a keystore that is managed with the Java Keytool utility and is integral to the Java Runtime Environment for validating SSL/TLS connections.

Purpose: Stores CA certificates that Java uses to verify secure communications.
Usage: Managed via command-line tools like keytool (e.g., keytool -list -keystore cacerts).
Format: A binary keystore file that is password protected (default password is often 'changeit').
Location: Typically located in the Java installation directory (commonly under JAVA_HOME/lib/security/).

More details can be found at the Oracle Java Downloads page.
FilExt.com tip: This file is essential for ensuring that Java applications can authenticate and trust external secure connections.

How to open CACERTS files

You need a suitable software like Java Keytool to open a CACERTS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CACERTS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CACERTS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CACERTS Text Viewer

Choose your .cacerts file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert CACERTS files:

Java Keytool
See the previous paragraphs to learn more about the main application. CACERTS files are often referred to as Java Keytool settings because this type of file is primarily created or used by this software.
Java Runtime Environment (JRE) and Java Development Kit (JDK)
*.CACERTS files are primarily used as the Java Certificate Authority (CA) Certificate store. They contain a collection of trusted CA certificates in a Java Keystore format. These certificates are used by Java applications to verify the authenticity and trustworthiness of other certificates presented by servers during secure communication, such as those using HTTPS. The *.CACERTS file ensures that Java applications can establish secure connections by validating the digital certificates presented by servers against a trusted list of CAs. This file format is classified as Security.

Technical Data for CACERTS File Extension

File classification:

Settings

Related files:

jks, pem, der, crt, cer, p12, pfx, keystore, jceks, bks, certs, cert, keystore, file, ser, class

a cacerts keystore file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with CACERTS files

Associate the CACERTS file extension with the correct application.
Update your software that should actually open keystore files. Because only the current version supports the latest CACERTS file format. Search, therefore, e.g. on the manufacturer website after an available Java Keytool update.
To make sure that your CACERTS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .CACERTS file online - secure, fast, and no downloads needed.