leftypol - vichan/lainchan based imageboard software
We highly recommend you read the vichan GitHub wiki for a basic guide to features.
- PHP >= 5.4 (we do not actively check if this is still supported) PHP 8.0 is explicitly supported. PHP 7.x should be compatable.
- MySQL/MariaDB server >= 5.5.3
- Composer (To install various packages)
- PHP GD
- PHP PDO
This should be compatible with all major web servers and
operating systems. This code does not include an Apache
.htaccess file nor does
it need one.
- ImageMagick (command-line ImageMagick or GraphicsMagick preferred).
- APC (Alternative PHP Cache), Redis, XCache or Memcached
You can contribute to leftypol, and upstream imageboard softwares, by:
- Developing patches/improvements/translations and using this repo to submit pull requests
- Providing feedback and suggestions
- Writing/editing documentation
If you need help developing a patch, please reply to the sticky on our /tech/ board.
Download and extract leftypol to your web directory or get the latest development version with:
git clone git://git.leftypol.org/leftypol/leftypol.git
composer installinside the directory
install.phpin your web browser and follow the prompts.
leftypol should now be installed. Log in to
mod.phpwith the default username and password combination: admin / password.
Please remember to change the administrator account password.
See also: Configuration Basics.
This probably will break if you try and upgrade from vichan or the older (<= August 2021) leftypol versions. Ask us for migration advice if you intend to do so.
To upgrade from this repo:
git pull to update your files, if you used git, or
inc/instance-config.php, replace all your files in place
(don't remove boards etc.), then put
inc/instance-config.php back and
To migrate from a Kusaba X board, use http://github.com/vichan-devel/Tinyboard-Migration (untested)
If you find a bug, please report it.
If you need assistance with installing, configuring, or using leftypol, you may find support from a variety of sources:
- If you're unsure about how to enable or configure certain features, make
sure you have read the comments in
- For support, reply to the sticky on our /tech/ board.
vichan, and by extension lainchan and leftypol, is based on a Tinyboard, so both engines have very much in common. These links may be helpful for you as well:
- Tinyboard documentation can be found here.
There are a few command line interface tools, based on Tinyboard-Tools. These need
to be launched from a Unix shell account (SSH, or something). They are located in a
You actually don't need these tools for your imageboard functioning, they are aimed at the power users. You won't be able to run these from shared hosting accounts (i.e. all free web servers).
Wanting to have leftypol in your language? You can contribute your translations to vichan at this URL:
leftypol makes use of wPaint for oekaki. After you pull the repository, however, you will need to download wPaint separately using git's
submodule feature. Use the following commands:
git submodule init git submodule update
To enable oekaki, add all the scripts listed in
js/wpaint.js to your
inc/lib/webm/README.md for information about enabling webm.
leftypol provides by default a 4chan-compatible JSON API, just like vichan. For documentation on this, see: https://github.com/vichan-devel/vichan-API/ .