FlatLaf - Flat Look and Feel

FlatLaf is a modern open-source cross-platform Look and Feel for Java Swing desktop applications.

It looks almost flat (no shadows or gradients), clean, simple and elegant. FlatLaf comes with Light, Dark, IntelliJ and Darcula themes, scales on HiDPI displays and runs on Java 8 or newer (LTS and latest).

The look is heavily inspired by Darcula and IntelliJ themes from IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.

macOS Themes

IntelliJ Platform Themes

FlatLaf can use 3rd party themes created for IntelliJ Platform (see IntelliJ Themes Pack):

Sponsors

Current Sponsors

Become a Sponsor

Previous Sponsors

Demo

Run demo with java -jar flatlaf-demo-<version>.jar (or double-click it). Requires Java 8 or newer.

Download

FlatLaf binaries are available on Maven Central.

If you use Maven or Gradle, add a dependency with following coordinates to your build script:

groupId:     com.formdev
artifactId:  flatlaf
version:     (see button below)

Otherwise, download flatlaf-<version>.jar here:

• See Native Libraries distribution for instructions on how to redistribute FlatLaf native libraries with your application.
• Windows DLLs: Free code signing provided by SignPath.io, certificate by SignPath Foundation.
• If repackaging FlatLaf (and other) JARs into a single fat/uber JAR:
• add Multi-Release: true to META-INF/MANIFEST.MF
• keep META-INF/versions/ and META-INF/services/ directories
• merge content of equally named files in META-INF/services/
• If using obfuscation/minimizing/shrinking tools (e.g. ProGuard or Shadow), exclude package com.formdev.flatlaf and all sub-packages.

Snapshots

FlatLaf snapshot binaries are available on Sonatype Central. To access the latest snapshot, change the FlatLaf version in your dependencies to <version>-SNAPSHOT (e.g. 3.7-SNAPSHOT) and add the repository https://central.sonatype.com/repository/maven-snapshots/ to your build (see Maven and Gradle docs).

Addons

• IntelliJ Themes Pack - bundles many popular open-source 3rd party themes
• Extras - SVG icon, tri-state check box, UI inspectors, and more
• SwingX - support for SwingX components
• JIDE Common Layer - support for JIDE Common Layer components
• Fonts - some font families bundled in easy-to-use and redistributable JARs

Getting started

To use FlatLaf, add following code to your main method before you create any Swing component:

FlatLightLaf.setup();

// create UI here...

Documentation

For more information and documentation visit FlatLaf Home:

• Themes
• Customizing
• How to Customize
• Properties Files
• Components UI Properties
• Typography
• Client Properties
• System Properties

Theme Editor

The Theme Editor that supports editing FlatLaf theme properties files. See Theme Editor documentation for details and downloads.

Buzz

• FlatLaf 3.1 (and 3.0) announcement on Reddit
• FlatLaf 1.0 announcement on Reddit
• FlatLaf announcement on Reddit

Applications using FlatLaf

Featured

• JFormDesigner (commercial) - Java/Swing GUI Designer (from the FlatLaf creators)
• JProfiler (commercial) - the award-winning all-in-one Java profiler
• install4j (commercial) - the powerful multi-platform Java installer builder
• DbVisualizer (commercial) - the universal database tool for developers, analysts and DBAs
• Apache NetBeans - IDE for Java, PHP, HTML and much more
• Thermo-Calc (commercial) - Thermodynamics and Properties Software

Data

• Ultorg (commercial) - a visual query system for relational databases
• Jailer - database subsetting and relational data browsing tool
• MagicPlot (commercial) - Software for nonlinear fitting, plotting and data analysis
• Constellation - Data Visualization and Analytics (based on NetBeans platform)
• Kafka Visualizer - Kafka GUI client
• RedisFront - Cross-platform redis GUI
• Zettelkasten - knowledge management tool
• QStudio - free SQL editor

Security

• ZAP - the world's most widely used web app scanner
• Burp Suite Professional and Community Edition (commercial) - the leading software for web security testing
• Ghidra - a software reverse engineering (SRE) framework
• jadx - Dex to Java decompiler
• BurpCustomizer - adds more FlatLaf themes to Burp Suite
• Total Validator (commercial) - checks your website
• JPass - password manager with strong encryption

Software Development

• jclasslib bytecode viewer
• KeyStore Explorer
• muCommander - lightweight cross-platform file manager
• Guiffy (commercial) - advanced cross-platform Diff/Merge
• HashGarten - cross-platform Swing GUI for Jacksum
• Pseudo Assembler IDE - IDE for Pseudo-Assembler
• Linotte - French programming language created to learn programming
• lsfusion platform - information systems development platform
• Consulo - open source cross-platform multi-language IDE (Java, .NET, JS, etc)
• Convertigo - low code & no code mobile & web platform
• EduMIPS64 - visual MIPS64 CPU simulator
• Launch4j - cross-platform Java executable wrapper

Electrical

• Antares - a free, powerful platform for designing, simulating and explaining digital circuits
• Logisim-evolution - Digital logic design tool and simulator
• OpenPnP - SMT Pick and Place Hardware and Software
• TrainControl - control Marklin / Trix / DCC digital model train layout
• Makelangelo Software - for plotters, especially the wall-hanging polargraph
• GUIslice Builder - GUI builder for GUIslice, a lightweight GUI framework for embedded displays
• ThunderFocus - Arduino-based telescope focuser
• RemoteLight - multifunctional LED control software

Media

• jAlbum (commercial) - creates photo album websites
• MediathekView - search in media libraries of various German broadcasters
• Pixelitor - image editor
• Cinecred - create beautiful film credit sequences
• tinyMediaManager (commercial) - a media management tool
• Weasis - medical DICOM viewer used in healthcare by hospitals, health networks, etc
• Shutter Encoder (source code) - professional video converter and compression tool
• Sound Analysis - analyze sound files in time or frequency domain
• Novel-Grabber - download novels from any webnovel and lightnovel site
• lectureStudio - digitize your lectures with ease
• Nortantis - fantasy map generator and editor

Modelling / Planning

• OpenRocket - model-rocketry aerodynamics and trajectory simulation software
• Warteschlangensimulator - discrete-event stochastic simulator
• Gephi - the Open Graph Viz Platform
• Astah (commercial) - create UML, ER Diagram, Flowchart, Data Flow Diagram, Requirement Diagram, SysML diagrams and more
• IGMAS+ - Interactive Gravity and Magnetic Application System
• StarPlan (commercial) - die Stundenplan Software für Bildungseinrichtungen
• SSPlot - plotting utility for plotting CSV data

Documents

• Big Faceless (BFO) PDF Viewer (commercial) - Swing PDF Viewer
• PDF Studio (commercial) - create, review and edit PDF documents
• XMLmind XML Editor (commercial)

Geo

• JOSM - an extensible editor for OpenStreetMap (requires FlatLaf JOSM plugin)
• Mapton (source code) - some kind of map application (