CPIO Converter

Convert CPIO files online, for free, with nothing to install.

CPIO is an old Unix archive format that is still used inside RPM packages and for the Linux boot ramdisk (initramfs). CPIO files can be saved as ZIP, 7Z, TAR, TAR.GZ, TAR.BZ2, TAR.XZ, RAR, and most of these conversions run right in your browser, so your files stay on your device.

What is a CPIO file?

CPIO – CPIO archive. CPIO is an old Unix archive format that is still used inside RPM packages and for the Linux boot ramdisk (initramfs).

How to convert a CPIO file

  1. Click Select File, or drop your .cpio files anywhere on this page.
  2. Pick the format you want next to each file, for example ZIP.
  3. Click Convert, then Download when it's done.

CPIO at a glance

CPIO
TypeArchive
HoldsMany files and folders
CompressionNone
EncryptionNone
Created byUnix, 1970s
Best forLinux packages and boot images

Frequently asked questions

What is a CPIO file?

CPIO is an old Unix archive format that is still used inside RPM packages and for the Linux boot ramdisk (initramfs).

How do I open a CPIO file?

Archive programs such as 7-Zip open many formats. Without one, open it on our Extract CPIO Files page to see what's inside and save the files you need, or convert it to ZIP here: Windows, macOS and Linux all open ZIP files by themselves.

Is converting CPIO files free?

Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.

Are my CPIO files uploaded anywhere?

Files up to 200 MB never leave your device: ConvertKitty runs 7-Zip inside your browser. Only larger files, or formats your browser cannot handle, are sent to our server, over an encrypted connection, and deleted 72 hours after the conversion. The button says "Upload and convert" whenever that happens.

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