The next generation download utility.

aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink. aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces.


Download version 1.19.2. There you can download source distribution and binaries for OS X, Windows and Android.

The legacy releases earlier than 1.19.1 are available here.


  • Multi-Connection Download. aria2 can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth. Really speeds up your download experience.

  • Lightweight. aria2 doesn’t require much memory and CPU time. When disk cache is off, the physical memory usage is typically 4MiB (normal HTTP/FTP downloads) to 9MiB (BitTorrent downloads). CPU usage in BitTorrent with download speed of 2.8MiB/sec is around 6%.

  • Fully Featured BitTorrent Client. All features you want in BitTorrent client are available: DHT, PEX, Encryption, Magnet URI, Web-Seeding, Selective Downloads, Local Peer Discovery and UDP tracker.

  • Metalink Enabled. aria2 supports The Metalink Download Description Format (aka Metalink v4), Metalink version 3 and Metalink/HTTP. Metalink offers the file verification, HTTP/FTP/SFTP/BitTorrent integration and the various configurations for language, location, OS, etc.

  • Remote Control. aria2 supports RPC interface to control the aria2 process. The supported interfaces are JSON-RPC (over HTTP and WebSocket) and XML-RPC.

Usage Examples

Command-line scares you off? No, aria2 is really easy to use!!

Download from WEB:

$ aria2c

Download from 2 sources:

$ aria2c http://a/f.iso ftp://b/f.iso

Download using 2 connections per host:

$ aria2c -x2 http://a/f.iso


$ aria2c

BitTorrent Magnet URI:

$ aria2c 'magnet:?xt=urn:btih:248D0A1CD08284299DE78D5C1ED359BB46717D8C'


$ aria2c

Download URIs found in text file:

$ aria2c -i uris.txt

Related Projects

UI Frontends

  • webui-aria2: Web browser interface for aria2 (2012 GSOC project)
  • uGet: the Linux Download Manager


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.