ARC Converter
Convert files to and from ARC online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
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What is an ARC file?
The ARC file format is a legacy lossless data compression and archival container developed by System Enhancement Associates (SEA). Designed by Thom Henderson in 1985, it aggregates multiple files into a single binary structure using varying compression methods, most notably Lempel-Ziv-Welch (LZW) and Huffman coding. It served as the de facto standard for the Bulletin Board System (BBS) environment during the 1980s before being largely superseded by the PKZIP format. The architecture allows for hierarchical storage and metadata retention, though it lacks the encryption standards found in modern containers like 7z or RAR.
How to open an ARC file
Modern operating systems do not provide native kernel-level support for the SEA ARC format. Users require specialized third-party file extraction software to parse the legacy headers. On Windows, WinZip, PeaZip, and IZArc retain backward compatibility for extraction. macOS users can utilize The Unarchiver, while Linux environments often rely on the command-line utility nomarch (an open-source implementation of the ARC extraction algorithm) to access archived contents.
ARC Technical Info
- Full Name
- ARC Archive
- Developed By
- System Enhancement Associates (SEA)
- Initial Release
- 1985
- MIME Type
- application/x-arc
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