A modern, lightweight forum platform built with PHP 8. No database server required, runs on JSON flat files. Open source, fast, and endlessly extensible.
Everything you need
From flexible storage to powerful editors, granular permissions to SEO-ready pages — Flatboard gives your community everything it needs, right out of the box.
And also…
Extend Flatboard with plugins: polls, blog, private messaging, reputation, auto-moderation, analytics, and many more.
Runs on JSON flat files — no database server required. SQLite backend and StorageMigrator available with Flatboard Pro.
Each admin can easily customise the editor toolbar to match their community's needs — choose tools, presets, and layout, no code required.
Clean URLs, meta tags, canonical links, and sitemap — benefit from optimised natural search engine ranking out of the box.
Members react directly to any post with emoji reactions — boost engagement and get instant feedback without replying.
Categories managed by group permissions — control who can read, post, or moderate each section with fine-grained access rules.
Update Flatboard to the latest version in one click from the admin panel — no command line, no FTP, no downtime.
The default theme lets you customise colours and upload your logo directly from the admin panel — no CSS, no code, no technical knowledge required.
Members receive real-time notifications for replies, mentions, and reactions. Subscribe to any discussion to never miss an update — delivered in-app and by email.
Pin, lock, or mark a discussion as solved in one click. Members can flag the best answer directly from the thread — no admin panel required.
Adds 7 exclusive plugins, a built-in Analytics Dashboard, and a fully-featured premium theme on top of the Community edition — for a one-time payment of $49.
CMS pages, blog engine, landing page template, navigation builder & contact form — all in one plugin.
Open Graph, JSON-LD, XML sitemap, robots.txt, 301/302 redirects, GA4/GTM, and per-page overrides.
4 layouts, 4 navbar styles, dark/light mode, configurable colours, animations & parallax.
Visit KPIs, 30-day traffic charts, top pages, referrer sources & engagement ratios.
Dual-mode WYSIWYG & Markdown, image upload, YouTube/TikTok embeds, emoji picker & autosave.
Full inbox with read receipts, typing indicator, attachments, search & email notifications.
Activity charts, leaderboards, anomaly detection, spam scoring & email alerts.
Migrate between JSON and SQLite backends in one click — atomic, rollback-friendly, zero downtime.
Shadow ban, pre-moderation queue for new users, discussion merge with automatic 301 redirects, and bulk actions (hide, lock, pin, delete…).
Add ?token=your_api_key to any feed URL to access private categories in your feed reader — no login required. Works for all feed types: global, category, user, and tag.
Community-driven
Flatboard gets stronger with every bug report, translation, and idea.
Come ask questions, share your setup, or just say hello.
Browse the official docs to install Flatboard, create plugins, customise themes, and master every feature.
Read the DocsFound an issue? Report it on the forum so we can fix it quickly. Every report makes Flatboard more stable.
Bug ReportsAsk questions, share plugins, show off your install, and connect with other Flatboard users and developers.
Visit ForumNews & updates
Quick answer Choose Flatboard if you're starting fresh and want a forum that works in 2026 without fighting a codebase built in 2004. No MySQL, no manual updates, actively maintained. Stick with SMF if your community is already running on it and you have no compelling reason to move. SMF still works…
Read more🚀 Flatboard 5.5.1 "AEGIS" — What's new since 5.4.1 This release series brings security hardening, major performance gains, a revamped search experience, and a handful of useful new features.  🔴 Security CSRF protec…
Read more🚀 Changelog — Flatboard 5.5.1 "AEGIS" Release date: April 18, 2026 Fixed Core — Login redirect broken in subdirectory installs — After login (including 2FA), the redirect target stored in redirect_after_login is a base-path-stripped URL (as set by AuthMiddleware). LoginController now wraps it with U…
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