Description
Welcart is a free WordPress e-commerce plugin with the top market share in Japan. It offers extensive features and flexibility to help you build your own online store with ease. Compatible with PHP 7.4 to 8.3.
SHOPPING CART SYSTEM
Sell physical products with no limits on the number of items or categories. Manage inventory with SKU codes and configure flexible pricing and shipping options. Additional extension plugins are available to support digital content sales and subscriptions. Over 16 payment services can be added through the official Welcart website.
Welcart Payment services (Japanese)
DESIGN
A free responsive theme (Welcart Basic) is available, along with premium themes. You can customize the design and layout however you like.
Welcart Theme downloads (Japanese)
MANAGING SYSTEM
Order data is automatically saved and updated in the database. The order list page offers powerful filtering by customer information, date, product type, and more. From the order editing page, you can modify order details, send confirmation emails, download receipt PDFs, and more.
MEMBERSHIP SYSTEM
Welcart includes a built-in membership system with no additional plugins required. The member list page supports searching by customer information and purchase history. A point system is also available for members.
Screenshots
Installation
AUTOMATIC INSTALLATION
In your WordPress admin panel, go to Plugins > Add New, search for “Welcart”, and click “Install Now”.
MANUAL INSTALLATION
Download the plugin ZIP file. Then go to Plugins > Add New > Upload Plugin in your WordPress admin panel, and upload the ZIP file to install.
ATTENTION
During activation, Welcart writes data to tables such as postmeta, options, and terms. If you are installing on an existing site, backing up your data beforehand is strongly recommended. Welcart is not liable for any damages resulting from the use of this plugin. All operations are performed at the user’s own risk.
RECOMMENDED ENVIRONMENT
- WordPress 5.6 or greater
- PHP 7.4 or greater
- MySQL 5.5 or greater
- Own domain with SSL (shared SSL is not recommended)
FAQ
Please see Welcart Forum (Japanese).
Reviews
Contributors & Developers
“Welcart e-Commerce” is open source software. The following people have contributed to this plugin.
Contributors
“Welcart e-Commerce” has been translated into 2 locales. Thank you to the translators for their contributions.
Translate “Welcart e-Commerce” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
31 Aug 2026
V2.12.2
- Security enhancement (PHP Object Injection). Replaced maybe_unserialize() with an object-free equivalent throughout the plugin, and sanitized serialized values sent from the front end before they are stored. Extensions that call maybe_unserialize() on order or member data need the same change. This also covers paths that were not included in the original report. Thanks to daroo for the report.
- Security enhancement (Cross-Site Scripting). Escaped custom order field names and values on the order data editing page. Thanks to Afifudin Maarif for the report.
- Security enhancement (Cross-Site Scripting). Sanitized the product name, SKU and option fields when they are saved.
- Added arguments to the filter hooks for the honorific titles on the receipt and invoice PDFs.
- Fixed a PHP error on the order list and the member list that occurred when search condition cookies saved by an older version were still present.
18 Aug 2026
V2.12.1
- Security enhancement (Session Fixation). Thanks to bRpsd for the report.
- Removed the uscesid parameter from URLs, forms and scripts. Shop member form nonce keys are now generated by usc_e_shop::member_nonce_key(). Extensions and themes that build the key with get_uscesid() need to be updated.
- Fixed a fatal error that could occur when updating the cart.
- Fixed the pre-settlement log detail screen so that it no longer fails on order rows that cannot be restored.
For older versions, please see the Changelog Archive (Japanese).