> ## Documentation Index > Fetch the complete documentation index at: https://developers.deepl.com/llms.txt > Use this file to discover all available pages before exploring further. # About Animated DeepL banner The DeepL API provides programmatic access to DeepL’s language AI technology, making it possible to bring high quality translation capabilities directly to your websites and applications. ## Common use cases for the DeepL API: * **Website translation**: Localize websites and expand to new markets efficiently and at scale—even in sectors like e-commerce and news media with a large catalog of dynamic content. * **Company communications**: Integrate DeepL’s translation technology into your company’s systems such as Confluence and SharePoint. Enable your global teams to communicate seamlessly and with [maximum data security](https://www.deepl.com/pro-data-security/). * **Building multilingual products**: Translate chat conversations to connect users across language barriers in real time. Localize comments and product reviews with the click of a button. Make translation one of your differentiating features—however you imagine it. In addition, many leading computer-assisted translation (CAT) tool providers have [integrated DeepL’s technology into their software](https://support.deepl.com/hc/articles/360019358599-CAT-tools-supported). This lets translators benefit from DeepL’s high-quality neural translations within their favorite translation tool. If you would like to develop a DeepL plugin for your CAT tool, [please contact us at here](https://support.deepl.com/hc/en-us/requests/new). ## Why the DeepL API? * **High-quality text and document translations**: DeepL [consistently outperforms the competition](https://www.deepl.com/quality.html) in translation quality—and not only for text translation. The API also supports [.docx, .pptx, .xlsx, .txt, PDF, and HTML](/api-reference/document) files. * **Maximum data security**: With DeepL API paid plans, texts aren’t saved on persistent storage and aren’t used to train our models. And DeepL adheres strictly to EU data protection laws and ISO 27001. [Learn more about data security at DeepL](https://www.deepl.com/pro-data-security/). * **Customization with glossaries**: [Specify your own translations for words and phrases](/api-reference/multilingual-glossaries), and customize your translations consistently and at scale. To access the DeepL API, [sign up for a plan](https://www.deepl.com/en/pro#api). *** **Intended Purpose of the DeepL API** DeepL API is intended to translate or otherwise process general documents or other content provided by the Customer in accordance with the documentation. DeepL API is not intended for any high-risk applications as defined in [Article 6 of the EU AI Act](https://artificialintelligenceact.eu/article/6/) (including any applicable delegated acts adopted by the European Commission on the basis of this provision).