ARJ to ZIP Converter
Convert ARJ to ZIP online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
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What is an ARJ file?
The ARJ (Archived by Robert Jung) format is a lossless compressed archive container developed by Robert K. Jung in 1991 for MS-DOS environments, utilizing the LZ77-based Lempel-Ziv-Storer-Szymanski (LZSS) algorithm and Huffman coding. Prominent during the Bulletin Board System (BBS) era for its superior compression ratios compared to PKZIP 1.0, the format supports multi-volume spanning, 32-bit Cyclic Redundancy Checks (CRC-32) for data integrity, and password protection. The file structure consists of a main header followed by compressed file data blocks, making it capable of storing directory trees and file attributes compatible with 16-bit and 32-bit architecture.
How to open an ARJ file
Modern operating systems such as Windows 11, macOS, and Linux do not provide native kernel-level support for decoding legacy ARJ binaries. To extract these archives, users must utilize third-party file compression utilities that include the necessary decompression libraries. 7-Zip is the standard recommendation for Windows environments due to its broad codec support, while macOS users should utilize The Unarchiver; Linux users can access content via the command-line arj or unar packages found in standard repositories.
ARJ Technical Info
- Full Name
- Archived by Robert Jung
- Developed By
- Robert K. Jung
- Initial Release
- 1991
- MIME Type
- application/x-arj
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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Developer API
Convert ARJ to ZIP via API
Automate ARJ 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": "arj-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 "$UPLOAD_URL" --upload-file input.arj
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$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.