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CPIO to ZIP Converter

Convert CPIO to ZIP online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

01

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

02

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

03

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is a CPIO file?

The CPIO (Copy In, Copy Out) format is a binary or ASCII archive file format used predominantly in Unix-like operating systems for backing up and transferring files between disparate systems. Originally defined as part of the Programmer's Workbench (PWB/UNIX) and later standardized in POSIX.1 (IEEE Std 1003.1-1988), CPIO archives store file metadata-including inode numbers, user IDs, and timestamps-alongside the raw data stream. Unlike TAR, CPIO handles non-tape media and special files more robustly but requires specific headers (binary, old ASCII, or new ASCII/CRC) to ensure compatibility across System V and BSD-derived kernels.

How to open a CPIO file

Native extraction of CPIO archives is standard on Linux and macOS distributions via the GNU cpio or pax command-line utilities (e.g., cpio -idv < archive.cpio). For Windows environments, which lack kernel-level support for POSIX archiving tools, users must utilize third-party decompression software such as 7-Zip or PeaZip, which implement the necessary decoders to interpret the CPIO header structures and extract the contained file hierarchy.

CPIO Technical Info

Full Name
Copy In, Copy Out
Developed By
AT&T / Bell Labs
Initial Release
1977
MIME Type
application/x-cpio

What is a ZIP file?

The ZIP format is an archive file format capable of lossless data compression, originally created by Phil Katz of PKWARE. It utilizes a Central Directory structure to catalog files and supports various compression algorithms, most notably DEFLATE (RFC 1951). The format is standardized under ISO/IEC 21320-1:2015 as a document container file and serves as the base structure for modern file types like .docx and .jar.

How to open a ZIP file

The ZIP format enjoys universal native support across all major operating systems, including Windows (File Explorer), macOS (Archive Utility), and Linux. No third-party software is strictly required for basic extraction, though power users often employ tools like 7-Zip or WinRAR to access advanced features like AES-256 encryption or multi-volume spanning.

ZIP Technical Info

Full Name
ZIP Archive
Developed By
Phil Katz (PKWARE)
Initial Release
1989
MIME Type
application/zip

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert CPIO to ZIP in seconds

Every CPIO to ZIP conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

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Developer API

Convert CPIO to ZIP via API

Automate CPIO to ZIP conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "cpio-to-zip",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "zip"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.cpio

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.