SearXNG : Core Philosophy, Key Features, Advantages, and How to Use Public & Private Instances

👤 tarun basu • 📅 April 5, 2026 • 👁️ 12 views • 🔄 Updated May 13, 2026

opensource selfhosted

## What Is **SearXNG**? **SearXNG** is a free and open-source **metasearch engine** that aggregates results from many different search services while **not tracking, storing, or profiling users**. It was created as the successor to the original *Searx* project, continuing its philosophy of privacy and decentralization. | Feature | Details | | --- | --- | | Type | Metasearch engine (doesn’t crawl/index by itself) | | License | GNU Affero General Public License (AGPL-3.0) | | Codebase | Python (with web interface in HTML/CSS) | | Runs on | Linux, macOS, FreeBSD, and other Unix-like systems | | Offered as | Public instances or self-hosted servers | | Released | March 27, 2021 | | Website & Docs | [docs.searxng.org](http://docs.searxng.org) and public instance listings at [searx.space](http://searx.space) | ## How It Works SearXNG **does not function like traditional search engines** that crawl and index web pages itself. Instead: You enter a search query in the SearXNG interface. SearXNG sends that query to multiple configured search engines (e.g., Google, Bing, DuckDuckGo, Qwant) simultaneously. It **aggregates, deduplicates, and cleans up** the results before showing them to you. At no point does SearXNG store or log personal queries or user IP addresses. This aggregation means you often get **broader and less biased results** than you would from any single engine. ## Strong Privacy & Anonymity Privacy is the core philosophy of SearXNG: | Feature | Description | | --- | --- | | No Tracking | SearXNG does not log search queries, IP addresses, cookies, or user data. | | Opaque to Upstream Engines | Requests to search engines remove private data before being sent. | | No Profiling | No personalization or ad-targeting based on user activity. | | Optional Tor Support | Searches can be routed through Tor for additional anonymity. | | Encrypted Connections (HTTPS) | All traffic is encrypted to ensure security and privacy. | ## Core Philosophy and Privacy SearXNG’s primary goal is to provide search results without compromising user privacy. Unlike mainstream search engines that track queries, it implements a “zero-tracking” policy. **No User Tracking**: It does not store or share search queries, and by default, it disables all tracking cookies. **IP Protection**: All search requests are routed through the SearXNG instance, which hides your real IP address from the external search engines it queries . **Result Sanitization**: The engine actively removes tracking parameters from the URLs of search results before presenting them to you. **Forced Encryption**: It strongly encourages the use of HTTPS to encrypt the connection between you and the instance, ensuring your search activity cannot be easily intercepted ## Key Features and Customization SearXNG offers a highly customizable search experience that puts you in control. **Powerful Search Syntax**: You can refine your searches with special commands directly in the search box . Use `!` to search specific engines or categories (e.g., `!wp paris` to search Wikipedia, or `!images car` for an image search). Use `:` to select a language filter (e.g., `:fr !wp Wau Holland`). It supports **external bangs** from DuckDuckGo with `!!` to search other sites directly (e.g., `!!wfr Wau Holland`). **Extensive Filtering Options**: You can filter searches by time (day, week, month, year), language, and safe search level to fine-tune your results. **Multiple Categories**: Search across different categories like general web, images, videos, news, and maps, often with the ability to select multiple categories at once. **Customizable Interface**: You can change the theme, including a dark mode, and adjust the layout to your liking. You can even set results to open in a new tab by default. **Special Queries**: It includes built-in tools for tasks like generating a random UUID, calculating averages, or hashing text (e.g., `md5 lorem ipsum`). ## Technology and Architecture SearXNG is built on a modular and extensible architecture. **Metasearch Framework**: It acts as an aggregator, sending your query to multiple search engines simultaneously and merging the results. This is powered by a plugin-like system of **engine adapters** for each external service. **Performance Focus**: To ensure fast searches, it uses **asynchronous requests** to query engines in parallel. It can also be configured with a caching system like **Redis** to store popular queries and reduce load. **Flexible API**: It provides a RESTful API, allowing developers to integrate its search capabilities into other applications or tools. ## How to Get Started with SearXNG You have two main options for using SearXNG: use an existing public instance or run your own. **Use a Public Instance**: This is the easiest way to try it out. You can find a list of publicly available instances on the SearXNG project website. You can even set one as your browser’s default search engine. **Run Your Own Instance**: For maximum privacy and control, you can self-host SearXNG. This is surprisingly accessible thanks to its official Docker image. **Docker Deployment (Recommended)**: The quickest method is using Docker. After installing Docker, you can run a container with a simple command : bash docker run --name searxng -d -p 8888:8080 [docker.io/searxng/searxng:latest](http://docker.io/searxng/searxng:latest) You would then access your new instance at `http://localhost:8888`. **Other Deployment Options**: You can also install SearXNG directly on a Linux server (like Ubuntu) with or without Docker. For Windows users who prefer not to use a virtual machine or WSL, community projects offer adapted versions that run natively. ## Search Capabilities ### Metasearch Engine Aggregation SearXNG can query *hundreds* of separate search engines, including: Standard web search sources Images, videos, and news aggregators Specialized sources (scientific, social media, music, files, etc.) Multiple language and country variations Some instances support **up to around 247 search engines**, with many enabled by default. ### Search Categories Users can choose to search within different categories, such as: General web, Images, Videos, News, Social Media, Files, Science & academia, Maps and more This categorization helps narrow results to specific content types. ## Customization & Control ### Self-Hosting You can **run your own SearXNG instance** on a server, local machine, or cloud provider. This gives *full control* over: Which engines are queried UI themes and languages Request handling and privacy settings Maximum anonymity without relying on public instances Self-hosting is popular among privacy-focused individuals and organizations. ### User Preferences Even on public instances, users can customize: Search categories and engines Language filters Themes and appearance Default search engine settings (via OpenSearch) ## Architecture & UI Built on **Flask**, a lightweight Python web framework. UI renders server-side HTML with progressive enhancement so core search works without heavy JavaScript. Multiple themes, responsive design, and custom icon systems for different result types. There’s a clear separation between request handling, engine loading, query orchestration, and result formatting. ## Advantages **Privacy-first search** — no tracking or profiling. **Aggregated results from many sources** gives broader insights. **Open Source & Transparent** — code is open for audit and contributions. **Self-hostable & customizable** for users and organizations. **Supports Tor** for enhanced anonymity ## Considerations (Limitations) **Public instance reliability** can vary — they’re run by volunteers. **Self-hosting requires technical knowledge** (Docker, server setup). **Advanced search operators & deep query features** may be limited compared to Google/Bing. Results may sometimes differ in quality or relevance, especially for non-English queries depending on engine configurations. (community feedback) ## Use Cases Typical use cases include: **Privacy-first web searching** **Custom search portals** for companies or communities **Integration with workflows or AI tools** **Educational and research purposes** **Comparative search results across sources** ## Public & Private Instances **Public instances**: Everyone can use them like a typical search engine. **Private/self-hosted instances**: Only you or your organization uses them — best for maximum privacy. A list of public instances is maintained at *searx.space*. ## Community & Development SearXNG is actively developed by a community of contributors. Code and issue tracking hosted on GitHub. There are regular updates, plugins, and community-driven enhancements.