Every feature and shortcut of the online Java IDE

IntelliJ.ONLINE is a complete Java IDE in the browser. Create a project and start coding in seconds — nothing to install, works on any computer, tablet or phone.

• New project

  Projects → New Project. Pick plain Java, Maven or Gradle, a JDK from 8 up and optionally sample code. New Maven and Gradle projects include JUnit 5.

• Open a project

  Click a project in the Projects list. Recent projects are sorted by the last time you opened them; use the search field to filter.

• Project actions

  The ⋮ button next to a project renames or deletes it.

• IDE layout

  Project tree on the left, editor in the centre, Run and Problems tool windows at the bottom, run configuration and Run / Build / Stop in the toolbar.

• Project tool window

  Alt1

  Show or hide the file tree.

• Run tool window

  Alt4

  Show or hide the console.

• Problems tool window

  Alt6

  Show or hide the list of errors and warnings.

• Maximize editor

  CtrlShiftF12

  Hide every tool window and focus on code.

Your projects live in the cloud and are available wherever you sign in. Organise files the same way you would on your own machine.

• New class or file

  AltInsert

  Inside a source root this creates a class, interface, enum, record or annotation with the right package.

• Rename

  ShiftF6

  Rename the selected file or folder. Renaming a Java class from the editor also renames its file.

• Delete

  Delete

  Delete the selected file or folder. Deleted files stay in Local History and can be restored.

• Move

  Drag files and folders in the tree, or use Move… from the context menu.

• Upload and extract

  Bring existing code in: upload files or whole archives and they are unpacked straight into the project.

• Download

  Download any file, a build artifact, or the whole project as a .zip archive.

• Project Structure

  CtrlAltShiftS

  Switch the JDK and the language level of the project.

• External Libraries

  Explore the JDK and every library your project depends on, including their source code.

An editor that understands Java: it knows your project, the JDK and your libraries, catches mistakes as you type and helps you write code faster.

• Code completion

  CtrlSpace

  Suggestions appear while you type: classes, members, keywords, live templates and automatic imports.

• Quick documentation

  CtrlQ

  Javadoc for the symbol under the caret. It also appears on hover after a short delay.

• Go to declaration

  CtrlB CtrlClick

  Jump to where a class, method or variable is declared, including JDK and library sources.

• Find usages

  AltF7

  Every usage of the symbol in the project, listed in the Find tool window.

• Parameter info

  CtrlP

  All overloads of the method being called, with the current argument highlighted.

• Quick fixes

  AltEnter

  Fixes for the problem under the caret: add an import, safe delete unused code, add JUnit 5 to the build.

• Inspections

  Compilation errors appear as you type, and unused code is greyed out so it is easy to clean up.

• Next problem

  F2

  Jump to the next error or warning in the file. The counter in the top-right corner shows the totals.

• Previous problem

  ShiftF2

  Jump back to the previous error or warning.

• Comment line

  Ctrl/

  Comment or uncomment the current line or selection.

• Save

  CtrlS

  Files are saved automatically; this saves immediately.

• Split editor

  Right-click a tab → Split and Move Right to work on two files side by side.

Find anything in your project in a keystroke — files, classes, methods, IDE actions or a specific line.

• Search Everywhere

  ShiftShift

  One popup with Files, Classes, Symbols and Actions tabs. Fuzzy and camel-hump matching: type "AL" for ArrayList.

• Go to File

  CtrlE CtrlShiftN

  Type a file name or path. Add :line to open it at a line, for example Main.java:42. Ctrl+E works in every browser.

• Go to Class

  CtrlO CtrlN

  Classes from the project, the JDK and libraries. Ctrl+O works in every browser.

• Go to Symbol

  CtrlAltShiftN

  Methods, fields and classes declared in the project.

• Find Action

  CtrlShiftA

  Run any IDE action by name.

• Go to Line:Column

  CtrlG

  Enter a line or line:column.

• File Structure

  CtrlF12 Alt7

  Classes, methods and fields of the current file with visibility markers; type to filter.

• Switch tabs in a popup

  Tab

  Move between Files, Classes, Symbols and Actions.

Search and replace text in one file or across the whole project, from simple words to regular expressions.

• Find in file

  CtrlF

  A panel above the code with an occurrence counter.

• Replace in file

  CtrlR

  Replace one occurrence or all of them.

• Next occurrence

  F3 Enter

  Move to the next match.

• Find in Files

  CtrlShiftF

  Live results grouped by file. Limit with a mask such as *.java, !*Test.java or a directory.

• Replace in Files

  CtrlShiftR

  Preview every change and untick files you want to keep.

• Search tool window

  CtrlEnter

  Open in Find Panel keeps the results at the bottom while you edit.

Improve your code with confidence: rename, generate boilerplate and keep formatting consistent automatically.

• Rename

  ShiftF6

  Local variables, fields, methods and classes. Every occurrence is listed with a checkbox before anything changes.

• Generate

  AltInsert

  Constructor, getters, setters, getters and setters, equals() / hashCode() and toString() for the class under the caret.

• Reformat Code

  CtrlAltL

  Format with google-java-format. With a selection only those lines are formatted.

• Optimize Imports

  CtrlAltO

  Remove unused imports and sort the rest.

Compile and run real Java applications with Maven, Gradle or plain Java. Output appears live in the console, and your program can read input from it.

• Run

  ShiftF10

  Run the active configuration. Type into the console to send input to your program.

• Run current file or test

  CtrlShiftF10

  Run the main method or the test under the caret.

• Build project

  CtrlF9

  Compile without running. Errors are marked on the right lines.

• Stop

  CtrlF2

  Stop the running process.

• Run configurations

  AltShiftF10

  Application, JAR, Maven goals and Gradle tasks with arguments, VM options, working directory and environment variables.

• Gutter run markers

  The green arrow next to a main method or a test runs it directly.

• Reload Maven / Gradle project

  Resolve dependencies and their sources after editing pom.xml or build.gradle.

Write and run unit tests without leaving the editor — results are shown clearly, failures point straight to the code.

• Run a test

  CtrlShiftF10

  Use the gutter marker next to a test method or class.

• Tests tab

  Passed, failed and skipped tests as a tree, with failure messages and clickable stack traces.

• Run all tests

  Find Action → Run All Tests runs the whole suite.

• Add JUnit 5

  AltEnter

  In an older project, put the caret on an unresolved org.junit import and use the quick fix.

A safety net for your work: every change is saved as a version, so nothing is ever lost.

• Show History

  Right-click a tab or file → Local History. Versions are grouped by day with a diff against the current file.

• Revert

  Restore any version; the current state is saved first, so a revert can itself be undone.

• Recent Changes

  Every edited file, including deleted ones that can be restored.

• Checkpoints

  Reformat, rename and revert create labelled versions. Versions are kept for 30 days.

Short abbreviations that expand into common code. Type one and press Tab — and customise the list to match how you write.

• sout · souf · soutv · serr

  Tab

  Print a string, a formatted string, a value or an error.

• psvm · main

  A main() method.

• fori · itar · iter · whilen

  Index loop, array loop, for-each loop and while loop.

• ifn · inn · lazy

  Null checks and lazy initialization.

• try · thr · sw

  try / catch, throw new and a switch statement.

• psf · psfs · psfi · prsf

  Constant declarations.

• test

  A JUnit 5 test method.

• Next field

  Tab

  Move to the next template field.

• Your own templates

  Find Action → Live Templates… lets you add, edit or switch off templates. $NAME$ marks a field to fill in, $END$ the final caret position.

Make the IDE your own. Open Settings from the gear button on the Projects screen — changes apply instantly.

• Appearance

  Accent colour, interface size and corner style.

• Editor

  Font size, line spacing, line wrapping (never, on phones, always) and caret style.

• Documentation popup

  How long to hover before Javadoc appears.

• Account

  Your nickname, email and avatar.

• Legal

  Terms, privacy, acceptable use and security policies.

The full IDE, adapted for touch. Code on the go with the same features as on a desktop.

• Key bar

  Tab, brackets, symbols and arrow keys above the on-screen keyboard; hold an arrow to repeat.

• Horizontal scrolling

  Code does not wrap — swipe sideways while line numbers stay pinned.

• Bottom navigation

  Project, Run, Problems and the terminal open as sheets you can swipe down.

• Search button

  The magnifier in the toolbar opens Search Everywhere, including every action.

Your code runs on our servers in a private, isolated environment — safe for you and for everyone else on the service.

• Isolation

  Every build and run is sealed off from the server and from other people’s projects. Files never leave your project.

• Console programs

  Programs talk to you through the console. Desktop windows and graphical interfaces are not available.

• No servers or hosting

  IntelliJ.ONLINE is for writing, building, testing and debugging code. Programs and tests cannot open ports, run web applications or host anything, and they have no internet access. Maven and Gradle can still download your project dependencies.

• Fair use

  Long-running processes are stopped automatically so resources stay available for everyone.

• Browser shortcuts

  Chrome and Edge keep Ctrl+N and Ctrl+Shift+N for new windows. Use Ctrl+O, Ctrl+E or Shift Shift instead. Shortcuts work with any keyboard layout.

The shortcuts follow the familiar IntelliJ keymap and work with any keyboard layout. Chrome and Edge reserve Ctrl+N and Ctrl+Shift+N, so use Ctrl+O, Ctrl+E or Shift Shift instead.