CSDN (Chinese Software Developer Network) is a professional developer community in China operated by Beijing Innovation Lezhi Network Technology Co., Ltd., established in December 1999. The platform covers technical communities, online education, developer tools, and talent services, with over 51 million registered users as of 2022.
Unlike the cloud storage platforms covered elsewhere in this wiki, CSDN is primarily a developer community. Its relevance to file downloading comes from its Resource Download Center, where users share and download technical resources such as source code, libraries, development tools, datasets, and technical documents. These resources are gated behind a points system or VIP membership, both of which require Chinese payment methods to purchase.
CSDN is accessible worldwide, and registration is open to anyone using an email address or foreign phone number. However, acquiring the points or VIP membership needed to download paid resources requires Chinese payment methods such as Alipay or WeChat Pay.
Chinese Software Developer Network
| Operator | Beijing Innovation Lezhi Network Technology Co., Ltd. |
| Founded | December 1999 |
| Users | 51M+ registered |
| Registration | Email or phone (international supported) |
| Website | csdn.net |
The CSDN Resource Download Center is the platform's file sharing and distribution system, providing technical resources for IT professionals. Users upload resources and set a points price, and other users spend points to download them.
The download center covers a wide range of technical categories including mobile development (Android, iOS), programming languages (C, C++, Java, Python, JavaScript, PHP), web development, database resources (MySQL, Oracle, Redis, MongoDB), operating systems (Linux, Windows Server), network and security tools, course materials, and certification exam preparation resources.
New users can upload resources up to 50 MB per file. Each user level increase adds 10 MB to the upload limit. Resources with zero downloads within five days can be deleted by the publisher, and resources with fewer than five downloads after 90 days are automatically removed by the system.
All uploads go through a review process. Non-technical content such as MP3 files and novels is prohibited. Resources must be functional and openable. Password-protected archives, intentionally split files, and advertising content are rejected during review.
CSDN uses a points-based economy for its Resource Download Center. Points are the currency used to download resources, and users can earn them through community participation or purchase them through VIP membership.
Users earn points by uploading resources that others download (capped at 100 points per resource), uploading free resources that receive downloads (1 point per download), rating resources they have downloaded (1 point), commenting on downloaded resources (returns the original download cost), exchanging forum participation points at a 5:1 ratio, and binding a phone number to their account (50 points one-time bonus).
Downloading a resource deducts points equal to the price set by the uploader. Repeated downloads of the same resource do not deduct additional points. Publishing content that violates platform rules results in a 50-point penalty, and uploading advertising content leads to account suspension.
A professional technical writing and sharing platform for developers. CSDN Blog is one of the most widely used technical blogging platforms in China, with articles covering virtually every programming language, framework, and technology topic.
An open source code hosting platform launched in September 2020, serving as CSDN's answer to GitHub and Gitee. GitCode provides repository hosting, issue tracking, and collaboration tools for Chinese developers.
An online learning platform offering courses and live streaming sessions from senior technical experts. Coverage areas include artificial intelligence, big data, blockchain, databases, web development, mobile development, and certification exam preparation.
An AI-powered programming tool developed by CSDN, providing code generation and development assistance features for the platform's developer user base.
CSDN launched in December 1999 with a distinctive IT professional points-based forum. In October 2000, the company founded "Programmer" magazine, China's first publication for IT professional developers. By 2004, CSDN had over 800,000 registered members, launched a talent service platform, and pioneered professional blog services in China. In 2006, Gobi Fund invested in the company, and CSDN was selected as a Red Herring Asia Top 100 Enterprise.
CSDN surpassed 2 million registered members in 2007 and 10 million by 2009. During this period, the company acquired Unix-Center open source community (2009) and JavaEye programmer community (2010), hosted its first China Mobile Developer Conference, and exceeded 15 million registered members. The company established multiple subsidiaries and training partnerships.
In December 2011, hackers publicly released CSDN's user database containing over 6 million email accounts and plaintext passwords. The breach revealed that CSDN had been storing user passwords without encryption. Beijing police investigated, arrested five suspects, and issued an administrative warning penalty to CSDN, marking China's first penalty under the information security classification protection system. The incident prompted CSDN to implement full ciphertext protection for its user database.
CSDN undertook the first China Artificial Intelligence Conference in 2015 and strategically upgraded its AI community in 2018. In 2019, the platform hosted the AI Developer Conference. In 2020, CSDN established its headquarters in Changsha, launched the CSDN Education university cooperation platform, launched GitCode for code hosting, and hosted the Changsha China 1024 Programmer Festival.
BAIDUDL supports downloading resources from CSDN. If you have a CSDN resource link, you can use our service to download the files directly, no points balance, VIP membership, or Chinese payment method required.
Simply choose a plan that fits your file size, enter your CSDN resource link and email into the form, choose a payment method, and pay. We will download the resource on your behalf and deliver it to your email with a secure, high-speed download link. Our how-to guide walks through the full process step by step.
Some CSDN resources are paid and display a price in CNY (shown with the yuan symbol on the download button). If the resource you request is a paid resource, you may be invoiced the additional cost of that resource on top of the plan you selected.
Chinese Software Developer Network
| Operator | Beijing Innovation Lezhi Network Technology Co., Ltd. |
| Founded | December 1999 |
| Users | 51M+ registered |
| Registration | Email or phone (international supported) |
| Website | csdn.net |