Which MIME types are related to file extension ".wacz"?
The .wacz file extension is associated with 1 MIME types:
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
About .wacz Files
WACZ files are a specialized archive type used to bundle web collections. They use the MIME type application/x-wacz and are built to store snapshots of web pages along with associated media and metadata.
They are mainly used in web archiving projects where preserving the structure and content of websites is essential. This file format supports offline viewing and long-term digital preservation of dynamic web content.
- Main Use: Collecting and preserving complete websites.
- Data Stored: Web pages, images, videos, and accompanying metadata.
- Software: Applications like Webrecorder tools are known to create, view, and manage these files.
Relationship between file extension and MIME type
A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.
File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.
File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.
Associated MIME types
FAQs
What is a .wacz file?
A .wacz file allows you to store and share web archives in a single, compressed package. Standing for Web Archive Collection Zipped, it bundles raw web data (WARC files) with indexes and metadata, making it easier to view archived websites using tools like Webrecorder.
How do I open a .wacz file?
The most reliable way to open a .wacz file is using ReplayWeb.page, a browser-based player. You can simply drag and drop the file into the website to browse the archived content exactly as it appeared when it was captured.
Can I extract the contents of a .wacz file manually?
Yes, the .wacz format is based on the standard ZIP container. You can rename the file extension to .zip or open it directly with archive managers like 7-Zip or WinRAR to access the internal .warc files and JSON metadata.
What tools can create .wacz files?
You can create these archives using tools from the Webrecorder project, such as the ArchiveWeb.page desktop app or browser extension. Advanced users can also use the command-line tool Browsertrix to crawl websites and generate WACZ files automatically.
How is .wacz different from .warc?
While a .warc file contains raw captured network traffic, a .wacz file is a container that holds the WARC data plus search indexes and page lists. This structure allows viewers to load and search the archive much faster than raw WARC files.
What is the correct MIME type for WACZ files?
When hosting these files on a server, you should configure the Content-Type header to application/x-wacz. This ensures that web-based players recognize the file format correctly. You can verify this type at application/x-wacz.
Are .wacz files safe to open?
generally yes, as they are archives of web data, but they contain code (HTML/JS) captured from the internet. When you view them in a player like ReplayWeb.page, the content is usually sandboxed to prevent malicious scripts from affecting your main browser session.
General FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.
Why can one extension have multiple MIME types?
Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.