Yes (when using the standard Zip format).
Files encrypted with ZIP-compatible AES encryption can be decrypted with ZIP tools from various vendors, including WinZIP and PowerArchiver.
Update 2021:
Syncovery’s new Sz format can only be unpacked in these ways:
- Using our new SzArchiver Tool
- By creating a Syncovery profile to copy them from right to left, or using the Restore Wizard.
- If you use Sz packages with multiple files per archive, they will only be unpacked by a Syncovery profile if you choose “Upack all Zip or Sz files which are copied to the destination”.
- The Syncovery Remote Service can also unpack incoming Sz packages.