aria2 review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

aria2 is an open-source command-line download utility for technical users who want a scriptable local transfer engine. It supports Windows, macOS, Linux and Android, with transfers across HTTP(S), FTP, SFTP, BitTorrent and Metalink. Its command-line design suits users who are comfortable working with terminal commands, automation and configurable download behavior rather than a traditional graphical workflow.

Protocol flexibility is aria2’s defining strength. Multi-source and segmented downloading can support transfers across several source connections, while Metalink chunk checksum validation provides an integrity check for supported downloads. Selective downloads are available for multi-file torrents and Metalink files, and disk caching adds another configurable part of the transfer process. Bandwidth throttling helps control network use when downloads share a connection with other work.

Remote control and daemon operation make aria2 suitable for systems where the download engine runs separately from the controlling interface. JSON-RPC and XML-RPC support allow compatible tools or scripts to manage transfers remotely, while the published platform coverage gives it a place in Windows, macOS, Linux and Android workflows. The trade-off is that command-line operation requires more technical familiarity than a graphical download manager. Users seeking video downloading, scheduled downloads, a browser extension or a portable build should choose a product centered on those workflows instead. aria2 is the better fit for users who value protocol coverage, scripting and remote control over visual simplicity.

aria2 pros and cons

• Where it wins
  • Supports HTTP(S), FTP, SFTP, BitTorrent and Metalink transfers
  • Combines multi-source, segmented downloading and checksum validation
  • Offers JSON-RPC, XML-RPC, daemon operation and bandwidth throttling
• Where it doesn't
  • Command-line operation is less approachable than a graphical interface
  • Video downloading is not explicitly documented
  • Scheduled downloads, browser extensions and portable builds are not documented

aria2 fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update