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3x-ui/docs/content/docs/en/help/faq.mdx
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VAIO73 052b11d2bc feat(i18n): add the Slovak (sk-SK) panel locale (#6889)
Adds a complete Slovak translation of every panel and bot string, registers
sk-SK in the language picker (a browser set to sk now lands on it instead of
English) and loads Ant Design's Slovak locale. The locale count in the READMEs,
docs and contributor guides moves from 13 to 14.
2026-10-24 07:35:28 +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 14-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).