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Licenses/GPL-3.0.md
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# GNU General Public License version 3
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**SPDX identifier:** `GPL-3.0-only`
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**Canonical publisher/reference:** Free Software Foundation
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**Canonical text:** <https://www.gnu.org/licenses/gpl-3.0.txt>
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## Complete legal text
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Copy the entire block below when you need the unmodified licence text. Replace bracketed copyright placeholders only where the licence itself instructs you to do so.
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```text
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GNU GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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Preamble
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The GNU General Public License is a free, copyleft license for
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software and other kinds of works.
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The licenses for most software and other practical works are designed
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to take away your freedom to share and change the works. By contrast,
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the GNU General Public License is intended to guarantee your freedom to
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share and change all versions of a program--to make sure it remains free
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software for all its users. We, the Free Software Foundation, use the
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GNU General Public License for most of our software; it applies also to
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any other work released this way by its authors. You can apply it to
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your programs, too.
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When we speak of free software, we are referring to freedom, not
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price. Our General Public Licenses are designed to make sure that you
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have the freedom to distribute copies of free software (and charge for
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them if you wish), that you receive source code or can get it if you
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want it, that you can change the software or use pieces of it in new
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free programs, and that you know you can do these things.
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To protect your rights, we need to prevent others from denying you
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these rights or asking you to surrender the rights. Therefore, you have
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certain responsibilities if you distribute copies of the software, or if
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you modify it: responsibilities to respect the freedom of others.
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For example, if you distribute copies of such a program, whether
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gratis or for a fee, you must pass on to the recipients the same
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freedoms that you received. You must make sure that they, too, receive
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or can get the source code. And you must show them these terms so they
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know their rights.
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Developers that use the GNU GPL protect your rights with two steps:
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(1) assert copyright on the software, and (2) offer you this License
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giving you legal permission to copy, distribute and/or modify it.
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For the developers' and authors' protection, the GPL clearly explains
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that there is no warranty for this free software. For both users' and
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authors' sake, the GPL requires that modified versions be marked as
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changed, so that their problems will not be attributed erroneously to
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authors of previous versions.
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Some devices are designed to deny users access to install or run
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modified versions of the software inside them, although the manufacturer
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can do so. This is fundamentally incompatible with the aim of
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protecting users' freedom to change the software. The systematic
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pattern of such abuse occurs in the area of products for individuals to
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use, which is precisely where it is most unacceptable. Therefore, we
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have designed this version of the GPL to prohibit the practice for those
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products. If such problems arise substantially in other domains, we
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stand ready to extend this provision to those domains in future versions
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of the GPL, as needed to protect the freedom of users.
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Finally, every program is threatened constantly by software patents.
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States should not allow patents to restrict development and use of
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software on general-purpose computers, but in those that do, we wish to
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avoid the special danger that patents applied to a free program could
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make it effectively proprietary. To prevent this, the GPL assures that
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patents cannot be used to render the program non-free.
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The precise terms and conditions for copying, distribution and
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modification follow.
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TERMS AND CONDITIONS
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0. Definitions.
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"This License" refers to version 3 of the GNU General Public License.
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"Copyright" also means copyright-like laws that apply to other kinds of
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works, such as semiconductor masks.
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"The Program" refers to any copyrightable work licensed under this
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To "propagate" a work means to do anything with it that, without
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permission, would make you directly or secondarily liable for
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infringement under applicable copyright law, except executing it on a
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public, and in some countries other activities as well.
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To "convey" a work means any kind of propagation that enables other
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parties to make or receive copies. Mere interaction with a user through
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The Corresponding Source for a work in source code form is that
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A compilation of a covered work with other separate and independent
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6. Conveying Non-Source Forms.
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You may convey a covered work in object code form under the terms
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"Additional permissions" are terms that supplement the terms of this
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Additional permissions that are applicable to the entire Program shall
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the above requirements apply either way.
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You may not propagate or modify a covered work except as expressly
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Nothing in this License shall be construed as excluding or limiting
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567
under version 3 of the GNU Affero General Public License into a single
568
combined work, and to convey the resulting work. The terms of this
569
License will continue to apply to the part which is the covered work,
570
but the special requirements of the GNU Affero General Public License,
571
section 13, concerning interaction through a network will apply to the
572
combination as such.
574
14. Revised Versions of this License.
576
The Free Software Foundation may publish revised and/or new versions of
577
the GNU General Public License from time to time. Such new versions will
578
be similar in spirit to the present version, but may differ in detail to
579
address new problems or concerns.
581
Each version is given a distinguishing version number. If the
582
Program specifies that a certain numbered version of the GNU General
583
Public License "or any later version" applies to it, you have the
584
option of following the terms and conditions either of that numbered
585
version or of any later version published by the Free Software
586
Foundation. If the Program does not specify a version number of the
587
GNU General Public License, you may choose any version ever published
588
by the Free Software Foundation.
590
If the Program specifies that a proxy can decide which future
591
versions of the GNU General Public License can be used, that proxy's
592
public statement of acceptance of a version permanently authorizes you
593
to choose that version for the Program.
595
Later license versions may give you additional or different
596
permissions. However, no additional obligations are imposed on any
597
author or copyright holder as a result of your choosing to follow a
598
later version.
600
15. Disclaimer of Warranty.
602
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
603
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
604
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
605
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
606
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
607
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
608
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
609
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
611
16. Limitation of Liability.
613
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
614
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
615
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
616
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
617
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
618
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
619
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
620
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
621
SUCH DAMAGES.
623
17. Interpretation of Sections 15 and 16.
625
If the disclaimer of warranty and limitation of liability provided
626
above cannot be given local legal effect according to their terms,
627
reviewing courts shall apply local law that most closely approximates
628
an absolute waiver of all civil liability in connection with the
629
Program, unless a warranty or assumption of liability accompanies a
630
copy of the Program in return for a fee.
632
END OF TERMS AND CONDITIONS
634
How to Apply These Terms to Your New Programs
636
If you develop a new program, and you want it to be of the greatest
637
possible use to the public, the best way to achieve this is to make it
638
free software which everyone can redistribute and change under these terms.
640
To do so, attach the following notices to the program. It is safest
641
to attach them to the start of each source file to most effectively
642
state the exclusion of warranty; and each file should have at least
643
the "copyright" line and a pointer to where the full notice is found.
645
<one line to give the program's name and a brief idea of what it does.>
646
Copyright (C) <year> <name of author>
648
This program is free software: you can redistribute it and/or modify
649
it under the terms of the GNU General Public License as published by
650
the Free Software Foundation, either version 3 of the License, or
651
(at your option) any later version.
653
This program is distributed in the hope that it will be useful,
654
but WITHOUT ANY WARRANTY; without even the implied warranty of
655
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
656
GNU General Public License for more details.
658
You should have received a copy of the GNU General Public License
659
along with this program. If not, see <https://www.gnu.org/licenses/>.
661
Also add information on how to contact you by electronic and paper mail.
663
If the program does terminal interaction, make it output a short
664
notice like this when it starts in an interactive mode:
666
<program> Copyright (C) <year> <name of author>
667
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
668
This is free software, and you are welcome to redistribute it
669
under certain conditions; type `show c' for details.
671
The hypothetical commands `show w' and `show c' should show the appropriate
672
parts of the General Public License. Of course, your program's commands
673
might be different; for a GUI interface, you would use an "about box".
675
You should also get your employer (if you work as a programmer) or school,
676
if any, to sign a "copyright disclaimer" for the program, if necessary.
677
For more information on this, and how to apply and follow the GNU GPL, see
678
<https://www.gnu.org/licenses/>.
680
The GNU General Public License does not permit incorporating your program
681
into proprietary programs. If your program is a subroutine library, you
682
may consider it more useful to permit linking proprietary applications with
683
the library. If this is what you want to do, use the GNU Lesser General
684
Public License instead of this License. But first, please read
685
<https://www.gnu.org/licenses/why-not-lgpl.html>.
686
```
688
---
690
## Plain-language memory aid
692
**You may:** run, study, modify, copy, and distribute the program, and you may charge money for copies or support.
694
**When you convey copies or modified versions:** recipients must receive the same GPL freedoms. You must provide the corresponding source through one of the licence's permitted methods, preserve notices, identify modifications, and license the covered work under GPL version 3.
696
**Important protections:** GPLv3 addresses patents, anti-circumvention law, installation information for certain user products, and attempts to impose additional restrictions.
698
**Internal use:** private use and private modification do not by themselves require publication. The main source-sharing obligations arise when covered work is conveyed to others.
700
**Good fit:** projects that want strong copyleft, ensuring distributed derivatives remain free software under GPLv3.
702
---
704
## Summary disclaimer
706
The memory aid is provided for convenience and is not part of the licence. It does not modify, replace, or override the complete legal text above and is not legal advice. If the summary conflicts with the legal text, the legal text controls.