Changelog

Server Settings > Upgrade Minecraft Version. Move a Java server to a newer Minecraft version with your mods and plugins checked first, and a one-click undo.

They have no server jar in their folder, so they were reported as unrecognised and could not be added.

Minecraft 26 turns it on by default, which made new servers refuse everyone. There is a checkbox in the New Server wizard if you do want it on.

Turn the desktop toast on or off in Settings.

claim a yourname.coalstack.org address for a server from Networking, Custom Domain, Coalstack. It is off until you turn it on. You get one name during your free month of Plus, then one per relay connection. The name is a public address, so while your server runs it leads to your connection.

every backup is read back in full and checked for a world before it is copied anywhere. A backup that fails is discarded and reported, instead of failing on the day you need it. Passing runs show "Restore test passed" in the backup history.

Coalstack warns you when a server's memory stays far above its RAM limit for several minutes, or when the drive it is on has under 2 GB free. Brief spikes never trigger it and the same warning repeats at most every 6 hours. They show in Notifications and as desktop notifications, on by default.

show "Hosting your server" and the player count on your Discord profile while a server runs. Off by default; turn it on in Settings under Discord. It needs the Discord desktop app and never shares your server address.

the long explanations moved into hover tooltips.

It used to send a format those services reject. It now sends a proper message, including the name of the player who joined, and a failed delivery shows up in Notifications.

when a server crashes or won't start and Coalstack knows the cause, it offers the fix, restarts the server and checks it comes online. It covers a missing mod dependency, a client-only mod, a taken port, too little memory and an unaccepted EULA. You review every change first, removed mods are moved aside rather than deleted, and the whole round can be undone. Turn it to ask, automatic or off in Settings.

a button on the Content tab. Coalstack looks through your mods folder for what it expects to break the server (a client-only mod, or a mod whose required mod isn't installed) and offers to fix it before anything crashes. It needs the server stopped and never starts it. The last result is kept and shown straight away while nothing about your mods or server has changed; Recheck runs it again.

control your servers from other devices and coalstack.net with 1, 4 or 8 connections and no session limit. Buying a key includes the first month of the 1-connection plan free. The Free tier is unchanged: 1 connection, 2 hours at a time.

Free users keep the Marketplace and the Auto Debugger.

Optional dependencies were already ignored.

Coalstack now identifies the mod that is asking by its file, so a renamed jar or a mod id that differs from its Modrinth name still finds the right download, and it uses Forgified Fabric API and Connector where Fabric API would be. A client-only mod that is asking for them is moved out rather than fed what it wants.

Fabric mods that already declare themselves client-only are left alone, since Fabric skips them on a server.

World & Files > Worlds. Coalstack backs the current world up first, swaps in the new one, and rolls back if anything goes wrong. Works for Java and Bedrock servers.

Networking > Crossplay installs Geyser and Floodgate (checksum-verified) so Bedrock players can join your Java server, with Floodgate login already configured.

create a Velocity proxy in the New Server wizard, then link your Paper or Purpur servers to it under Networking > Network. Coalstack sets the forwarding secret, online-mode and ports for you.

Paper downloads work again, and Coalstack now prefers stable builds.

start, stop and restart it, watch the live console, see who is online, edit Server Properties, and manage the allow-list and permissions by gamertag (operator, member or visitor).

port forwarding opens the server's TCP port and its block of UDP ports together, and the firewall rule covers both. Coalstack pins the UDP block so the forward and the rule always match, and a server on the default port shows up on your local network.

Coalstack asks the running server to hold its world still, copies exactly the files it lists, then lets it carry on. Restoring replaces the world inside the backup and points the server at it.

native alerts for server crashes and failed backups while Coalstack is in the background. On by default; pick which events under Notifications > Alerts, and send yourself a test.

the Java runtime or Bedrock download, the server jar and any loader installer are listed as they finish.

Bedrock has no ban command - to remove a player, take them off the allow-list.

per-server settings (rename, Conduit, templates, recipes, forget/delete) now live on the Server page under Server Settings, alerts and webhooks are under Notifications, and every page's tabs are all visible instead of hiding behind a More menu.

World & Files has Server Properties and Icon & MOTD, Players has Admins and Invite Links, and the sidebar's Settings has General, Integrations and the Changelog.

a folder or Google Drive. PRO adds up to 3 (plus S3-compatible storage) and MAX is unlimited.

every backup run is listed with a check or warning, and expands to show how each destination did. Failed automated backups now send a notification.

It now asks Windows for permission only for the firewall change - which also stops Windows Defender from mistaking Coalstack for malware.

create Quilt servers in the Setup Wizard, import Quilt modpacks, and browse mods in the Marketplace (Fabric mods work too).

see at a glance whether a server is live-connected to the website, syncing in the background, or paused.

commands sent from the website now reach your server almost instantly instead of waiting on the next check-in.

the website now updates as soon as a server starts, and syncing no longer silently stops.

click a token like {player_count} to insert it at your cursor, Ctrl+Z to undo, and a live preview that only shows the delivery style(s) you actually selected instead of always showing both.

a port already in use), even though nothing had actually crashed.

Connect now starts the relay immediately instead of waiting for the next server start.

point Coalstack at any Minecraft server folder you already have, no download or copy needed.

export a server's settings and Modrinth-sourced mods/plugins to a file, then apply it from the setup wizard when creating a new server.

Marketplace re-checks installed mods/plugins against Modrinth once a week and has results ready on load.

an embeddable online/player-count badge for Discord or a forum, safe to share since it never exposes your IP, port, or domain.

create the same scheduled automation rule across several servers at once, each as its own independent copy.

server.properties and plugin/mod config edits are now versioned, with a diff view and one-click revert.

an opt-in weekly summary of each connected server's uptime and peak players.

2 hours before a 45-minute cooldown, up from 1 hour before a 1-hour cooldown.

browsing and installing from Modrinth now opens in its own window instead of always sitting on the page, with a category switcher, a sort option, and more results shown by default.

**.***.**:25565) so it doesn't leak in a screenshot or screen share.

naming and reachability options now live together in one card instead of two separate sections.

the click feedback was reading as jittery rather than responsive.

the stats refresh was sampling the same instant twice per poll instead of measuring the gap since the last one, so there was barely any time window for `sysinfo` to measure usage across.

search every page, tab, and common action from one shortcut.

the sidebar is down to 7 plain-language pages (Server, Players, Content, World & Files, Networking, Backups, All Servers), each with its everyday tools up front and advanced ones tucked under a "More" menu. Nothing was removed and nothing moved behind a paywall - every feature is still there, just reorganized.

run Coalstack with no window via --headless (or COALSTACK_HEADLESS=1), for a Linux server/systemd deployment. Backgrounds servers, backups, and Conduit remote control keep working exactly as before; a new shutdown handler now stops running servers gracefully on Ctrl+C or systemctl stop instead of killing them outright.

upload every backup to an S3-compatible bucket (AWS S3, Cloudflare R2, Backblaze B2, MinIO, Wasabi) as a real off-machine copy, alongside the existing local backups and secondary-directory copy. Configure it from a new button on the Backups page.

switch between servers in the active game right from there, with each option showing its platform icon and running/booting status and the current server's version next to its name.

total playtime, session count, and last seen for every player.

the app now reports the stop to the website immediately instead of waiting for the next relay tick.

COAL-017) for every recognized crash pattern, with a full reference page on the website.

a client-only mod like Sodium installed on a NeoForge/Forge server) previously gave the Auto Debugger nothing to work with - it's now caught and explained directly.

a single 0-100 score from TPS, memory, CPU, error rate, and player churn, with a color-coded ring and a sub-score breakdown. Vanilla/Fabric servers (where TPS can't be measured) scale the remaining points to 100 instead of being unfairly penalized.

search every plugin's YAML/TOML config files by key name, with results as you type and a click-through to the exact file.

HTTPS-only, private IPs rejected), per-rule conditions (player count, CPU/memory/TPS thresholds, time-of-day windows), a cooldown so a rule can't re-fire too soon, and a circuit breaker that auto-pauses a rule if it fires too often in an hour.

scans plugins/mods against Modrinth for newer versions and updates them in place, backing up the old jar first.

generate a coalstack.net/i/<code> link that shows your server's address and lets a friend request whitelist access, right from the new Invites page.

turns off all communication between this server and the website (no status reports, no remote commands) while keeping it fully usable locally. On by default, so nothing changes unless you turn it off.

automated backups, restart actions, and the mod/modpack installer split were gated differently than what the website advertised).

NeoForge on 1.26.2, which needs Java 25) would silently die on startup - no log file, no error, no crash report - because Coalstack's Minecraft-version-to-Java-version table had no upper bound and kept confidently answering "21" past the versions it actually knew about.

1.26.2) - the detected version was being re-derived from the loader's own version number instead of read from the real Minecraft version already sitting on disk.

pre-set gamemode, difficulty, and PVP when creating a new server from scratch.

every known server as a card (status, address, CPU/RAM, players) plus a Global Performance summary. It's now the app's home screen; open a server's Dashboard from its card.

Mods, Plugins, Resource Packs, and Data Packs in one tabbed page, each with a Trending list, bigger browsable cards, and a prompt to install a mod's required dependencies alongside it.

changing it updates server.properties and moves an active UPnP/firewall forward automatically, with guidance if a custom domain needs a manual DNS update.

it's a fixed pattern scan, not an AI call, so there was no reason to gate it.

it's noticeably wider now.

visual IF/THEN rules per server (e.g. give a new player a starter kit, or stop and back up the server once it's sat empty for a while), editable in place with directly-editable commands.

some Java installs relaunch into a separate child process that Coalstack wasn't tracking; it now follows the process tree to the real one.

a bad /give) looked identical to a working one - the server's real response now shows up in Notifications.

start, stop, restart, send console commands, kick, and ban from any device you're logged into, even while the server runs on your own PC.

change password, two-factor auth, and a "Log Out All Devices" control.

shown and copied instead of the raw IP:port once set.

now shows live progress.

Distant Horizons) wrongly marked "Unknown" - the version is now inferred from the filename when possible.

Fabric Language Kotlin) wrongly marked incompatible.