Convert ARC to ZIP

Some operating systems, applications, and upload services accept ZIP archives but cannot open older ARC files. Repackaging the files as ZIP makes them easier to share with tools that support the common format.

What the ARC format is

ARC refers to archive formats used to store multiple files in one compressed archive. The classic ARC format, created by System Enhancement Associates for DOS utilities, was common in early bulletin-board software. FreeArc later used the .arc extension for a different format, so the extension alone does not identify which ARC type a file contains.

What the ZIP format is

ZIP stores files and folders in a single archive and is supported by Windows, macOS, Linux, and most archive utilities. Its broad compatibility makes it useful for sharing. ZIP is not guaranteed to be smaller than ARC; the result depends on the files and compression settings.

How to convert ARC to ZIP

1. Open the archive in PeaZip and check that it can list the contents. PeaZip supports FreeArc-format ARC archives; a classic SEA ARC file or another variant may require a compatible extractor instead.
2. If PeaZip can read the archive, select it and choose Convert. Set the output format to ZIP, select a destination, and start the conversion. Check that the resulting .zip opens and contains the expected files.
3. If direct conversion is unavailable, extract the archive with a utility that supports its specific ARC variant. In PeaZip, select the extracted files and choose Add, set the archive format to ZIP, and save the new archive. Include the extracted folder itself if you want to keep that folder level in the ZIP.

Compatibility and limitations

Do not rename .arc to .zip; the formats have different archive structures. Repacking keeps the extracted file contents, but archive-specific settings and metadata—such as compression, comments, permissions, or encryption—may not transfer. Password-protected archives must be unlocked before repacking, and the ZIP may need its own encryption settings. Keep the ARC file until you have verified the ZIP. For private or sensitive files, use an offline converter rather than uploading the archive to an online service.