.cpio CPIO archive
CPIO Extractor
CPIO is an old Unix archive format still used inside Linux initramfs images and RPMs.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Working…
Keep this tab open — 7-Zip is running on your device, nothing is uploaded.
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CPIO at a glance
| Full name | CPIO archive |
|---|---|
| Type | Archive / compressed file |
| Compression | Lossless |
| Developed by | Unix |
| Introduced | 1977 |
| Extension | .cpio |
| Opens on iPhone | ✕ Needs an app (or this site) |
| Opens on Android | ✕ Needs an app (or this site) |
| Opens on Windows | ✕ Needs an app (or this site) |
| Opens on Mac | ✕ Needs an app (or this site) |
CPIO is best for Linux boot images.
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Frequently asked questions
What is a .cpio file?
CPIO is an old Unix archive format still used inside Linux initramfs images and RPMs.
How do I open a CPIO file on my phone?
Open this page in Safari or Chrome, tap Choose archive and pick the .cpio file. Its contents appear instantly and you can save any file.
Is it safe to extract CPIO files online here?
Yes. Extraction runs inside your browser and the archive is never uploaded.
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