Files
3x-ui/docs/content/docs/en/help/faq.mdx
T
MHSanaei 9b91f0f42e docs: vendor the documentation site into the monorepo
Fold the standalone 3x-ui-docs project (Next.js 16 + Fumadocs, deployed to
docs.sanaei.dev) into docs/ so the panel and its documentation share a single
source of truth, the way sing-box keeps its docs in-tree. The old repo becomes
redundant and can be retired.

- Import the full site under docs/ (app, components, content, lib, public,
  scripts, config). The self-contained pnpm project sits alongside the existing
  engineering notes with no filename collisions.
- Re-point "Edit on GitHub" links from MHSanaei/3x-ui-docs to this repo's
  docs/content/docs path (docs/lib/shared.ts, docs/app/.../page.tsx).
- Add docs-ci.yml and docs-deploy.yml under .github/workflows/, scoped to
  docs/** and run with working-directory: docs, since GitHub only runs
  workflows from the repo-root .github/. deploy-static.yml's GitHub Pages
  publish (CNAME docs.sanaei.dev) carries over unchanged.

Follow-up (outside this commit): attach the docs.sanaei.dev custom domain to
this repository's Pages (or set the Vercel project's root directory to docs),
confirm the site is live from the monorepo, then delete MHSanaei/3x-ui-docs.
2026-07-07 23:07:14 +02:00

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---
title: FAQ
description: Frequently asked questions about 3x-ui — licensing, supported systems, databases, and clients.
icon: CircleQuestionMark
---
## Is 3x-ui free and open source?
Yes. 3x-ui is open source under the GPL-3.0 license. The source is on
[GitHub](https://github.com/MHSanaei/3x-ui).
## What systems does it run on?
Most major Linux distributions (Ubuntu, Debian, CentOS/RHEL and derivatives,
Fedora, Arch, Alpine, and more) across `amd64`, `arm64`, and other architectures.
It also runs as a Docker container. See [Installation](/docs/guide/installation).
## SQLite or PostgreSQL?
SQLite is the default and is fine for most deployments. PostgreSQL is available
for larger setups via `XUI_DB_TYPE=postgres` and `XUI_DB_DSN` — see the
[environment variables](/docs/reference/env-vars).
## Which client apps work with it?
Any Xray-compatible client — for example v2rayNG, Hiddify, and Clash/Mihomo.
Import a client's share link or QR code, or use a
[subscription](/docs/config/subscription).
## How is 3x-ui different from x-ui?
3x-ui is an enhanced fork of the original X-UI project. It adds broader protocol
support, improved stability, per-client traffic accounting, multi-node
management, a 13-language UI, and many quality-of-life features.
## How do I update?
Re-run the install script (it updates in place), or pull the new Docker image.
See [Installation](/docs/guide/installation) and the
[releases page](https://github.com/MHSanaei/3x-ui/releases).
## Where can I get help?
Join the official Telegram channel [@XrayUI](https://t.me/XrayUI) for
announcements and community support, or open an issue on
[GitHub](https://github.com/MHSanaei/3x-ui/issues). For common problems, start
with [Troubleshooting](/docs/help/troubleshooting).