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Related: FTP vs HTTP, bittorrent vs HTTP and curl vs libcurl

curl vs Wget

The main differences as I (Daniel Stenberg) see them. Please consider my bias towards curl since after all, curl is my baby - but I contribute to Wget as well.

Please let me know if you have other thoughts or comments on this document.

What both do
How they differ
curlWget
  • library. curl is powered by libcurl - a cross-platform library with a stable API that can be used by each and everyone. This difference is major since it creates a completely different attitude on how to do things internally. It is also slightly harder to make a library than a "mere" command line tool.
  • Pipes. curl works more llke the traditional unix cat command, it sends more stuff to stdout, and reads more from stdin in a "everything is a pipe" manner. Wget is more like cp, using the same analogue. cURL
  • Single shot. curl is basically made to do single-shot transfers of data. It transfers just the URLs that the user specifies, and does not contain any recursive downloading logic nor any sort of HTML parser.
  • More protocols. curl supports FTP, FTPS, Gopher, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS, FILE, POP3, IMAP, SMB/CIFS, SMTP, RTMP and RTSP. Wget only supports HTTP, HTTPS and FTP.
  • More portable. curl builds and runs on lots of more platforms than wget. For example: OS/400, TPF and other more "exotic" platforms that aren't straight-forward unix clones.
  • More SSL libraries and SSL support. curl can be built with one out of eleven (11!) different SSL/TLS libraries, and it offers more control and wider support for protocol details. curl supports public key pinning.
  • HTTP auth. curl supports more HTTP authentication methods, especially over HTTP proxies: Basic, Digest, NTLM and Negotiate
  • SOCKS. curl supports several SOCKS protocol versions for proxy access
  • Bidirectional. curl offers upload and sending capabilities. Wget only offers plain HTTP POST support.
  • HTTP multipart/form-data sending, which allows users to do HTTP "upload" and in general emulate browsers and do HTTP automation to a wider extent
  • curl supports gzip and inflate Content-Encoding and does automatic decompression
  • curl offers and performs decompression of Transfer-Encoded HTTP, wget doesn't
  • curl supports HTTP/2 and it does dual-stack connects using Happy Eyeballs.
  • curl supports metalink
  • Much more developer activity. While this can be debated, I consider three metrics here: mailing list activity, source code commit frequency and release frequency. Anyone following these two projects can see that the curl project has a lot higher pace in all these areas, and it has been so for 10+ years. Compare on openhub
  • Wget is command line only. There's no lib or anything.
  • Recursive! Wget's major strong side compared to curl is its ability to download recursively, or even just download everything that is referred to from a remote resource, be it a HTML page or a FTP directory listing.A gnu head!
  • Older. Wget has traces back to 1995, while curl can be tracked back no earlier than the end of 1996.
  • GPL. Wget is 100% GPL v3. curl is MIT licensed.
  • GNU. Wget is part of the GNU project and all copyrights are assigned to FSF. The curl project is entirely stand-alone and independent with no organization parenting at all - with almost all copyrights owned by Daniel.
  • Wget requires no extra options to simply download a remote URL to a local file, while curl requires -o or -O.
  • Wget supports the Public Suffix List for handling cookie domains, curl does not.
  • Wget supports only GnuTLS or OpenSSL for SSL/TLS support
  • Wget supports only Basic auth as the only auth type over HTTP proxy
  • Wget has no SOCKS support
  • Its ability to recover from a prematurely broken transfer and continue downloading has no counterpart in curl.
  • Wget can be typed in using only the left hand on a qwerty keyboard!
Additional Stuff

Some have argued that I should compare uploading capabilities with wput, but that's a separate tool and I don't include that in this comparison.

Two other capable tools with similar feature set include aria2c and axel (dead project?) - try them out!

For a stricter feature by feature comparison (that also compares other similar tools), see the curl comparison table

Thanks

Feedback and improvements by: Micah Cowan, Olemis Lang

Updates

Updated: September 3, 2015 11:04 (Central European, Stockholm Sweden)