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XPI to 7Z converter, without the upload.

Turn XPI add-ons into 7Z. It is converted in your browser, so the file never leaves your device.

Drop XPI files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

Convert to

How to convert XPI to 7Z

  1. Add your XPI add-ons

    Drop XPI files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. 7Z is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the 7Z, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The XPI to 7Z converter is part of this page and runs inside your browser. Your add-ons are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

XPI to 7Z: what to expect

XPI is a Firefox add-on package that other programs do not install. 7z usually compresses tighter than ZIP. XPI is at home in installing Firefox add-ons; 7Z is the usual choice for the smallest archives.

A password-protected archive is refused, since its contents cannot be read without the password. An XPI is a ZIP archive with a signature. The files inside are repacked unchanged, but the new 7Z is no longer signed, so it will not install.

XPI vs 7Z

XPI

Firefox extension

An XPI, pronounced "zippy", is a Firefox or Thunderbird add-on: a ZIP archive holding a manifest, scripts, styles and images. Unpacking one is a quick way to see what an extension does.

Opens in Firefox (to install it) and any ZIP tool (to look inside)

XPI converter
7Z

7-Zip archive

7z is the format of the open-source 7-Zip tool. It usually compresses noticeably better than ZIP, at the cost of needing an extra app on many computers.

Opens in 7-Zip, Keka, The Unarchiver, WinRAR; not built into older Windows or macOS

7Z converter
XPI compared with 7Z
XPIFirefox extension7Z7-Zip archive
Stands forCross-Platform Install7-Zip archive
TypeZIP-based packageCompressed archive
CompressionLossless (Deflate, as in ZIP)Lossless (LZMA / LZMA2)
IntroducedAround 2000, by Mozilla1999, by Igor Pavlov
Opens inFirefox (to install it) and any ZIP tool (to look inside)7-Zip, Keka, The Unarchiver, WinRAR; not built into older Windows or macOS
Best forInstalling Firefox add-onsThe smallest archives
File extension.xpi.7z

Questions

Are my add-ons uploaded anywhere?

No. The XPI to 7Z conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting XPI to 7Z?

No. The files inside are repackaged unchanged.

Can I convert several XPI files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert XPI to 7Z on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the XPI file, press Convert and save the 7Z. There is nothing to install.

Is there a file size limit?

Yes. An archive can be up to 500 MB, unpack to at most 1 GB and hold up to 50,000 files; beyond those limits the page says so. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.