Everything you'd ask before downloading — pricing, server safety, mod compatibility, and installation. Can't find your question? Hop in our Discord.
General
Is Swift Client really free?+
Yes — fully free, with no paid tiers, no ads, and no telemetry. The project is funded by a small group of contributors and a Patreon for people who want to support development. Nothing in the client is gated.
Who makes Swift Client?+
A small group of friends. The launcher and mod source are both on GitHub at Flowberries/Swift-Client. We're not a company — there's no monetization plan.
Do you collect any data?+
No analytics, no telemetry. The launcher calls Microsoft's OAuth flow for sign-in, Mojang for the version manifest, and GitHub Releases for auto-update checks. That's the entire network surface.
Server safety
Is it safe to use on servers?+
Yes. Swift Client is strictly quality-of-life: an FPS readout, CPS counter, keystrokes display, coordinates, armor durability, potion timers, toggle-sprint, zoom, full bright, and a custom crosshair. No combat assists. No movement modification. No x-ray. Nothing that breaks server rules.
Will I get banned?+
Not for using Swift Client itself — every module is QoL-only and the mod source is public. Server admins are welcome to audit. As always, you're responsible for what you do in the game.
Does Swift Client modify any packets?+
No. All HUD data is read-only. Swift Client never sends anything Vanilla wouldn't — you can sniff your own traffic to verify.
Compatibility
Forge or Fabric?+
Fabric only. Swift Client ships as a Fabric mod, and the launcher installs the Fabric loader for you when you pick a version. Forge support isn't on the roadmap — keeping it Fabric-only is what lets us ship the same module code across 11 game versions.
Which Minecraft versions are supported?+
Eleven versions today: 1.21, 1.21.1, 1.21.4, 1.21.5, 1.21.7, 1.21.8, 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2. New stable Minecraft releases are usually supported within a week or two.
Can I install other Fabric mods alongside it?+
Yes — the launcher includes a built-in Modrinth and CurseForge browser, plus drag-and-drop install for local .jar files. Mods are scoped per Minecraft version, so what you install for 1.21.8 doesn't bleed into 26.1.2.
Installation
How do I install it?+
Download the installer for your OS, run it, sign in with your Microsoft account, pick a version, click Quick Play. Java, the Fabric loader, the working directory, and the bundled Swift Client mod are all set up for you.
Will it overwrite my existing Minecraft install?+
No. Swift Client installs to its own folder. Your worlds, resource packs, and official launcher are untouched.
Do I need to install Java separately?+
No — Java is bundled. The launcher also auto-detects any system JDKs (Temurin, Gradle-provisioned, IntelliJ, Homebrew) if you'd rather point it at one you already trust.
Troubleshooting
The launcher won't open. What do I do?+
On Mac first-launch you may need to right-click → Open (Gatekeeper). On Windows, try running as administrator. If it still won't start, hit Settings → Maintenance → Open logs folder and post the latest log in #support on Discord.
Minecraft crashed on launch.+
The launcher will surface a crash overlay automatically with quick buttons for Crash reports and latest.log. Open the log, scroll to the stack trace, and paste it in #support. Common causes: a third-party mod that doesn't match the Minecraft version, or a JDK newer than 21 selected by mistake.
Something looks broken. Where do I report it?+
GitHub Issues at Flowberries/Swift-Client for confirmed bugs, Discord #bug-reports for "is this a bug?" — we triage Discord daily.
Didn't find it?
Ask in #help.
Our Discord is small but responsive — drop a question and someone (usually one of the maintainers) will pick it up.