Our list of the 4 best Code Completion – 2025

To make it easier, we’ve grouped these into categories with the most popular first.

Although there are some similarities in features between these, depending on your situation, you might find one is more suitable to your needs.

Code Completion for Bloggers

  1. Syntax Checker

    SyntaxChecker is a free online tool that helps you find and fix errors in your code. It supports over 20 languages and can detect errors in HTML, CSS, JavaScript, PHP, and more. It's easy to use and can help you write better code.

Code Completion for Developers

  1. Scala IDE

    Scala-IDE is an open-source, Eclipse-based IDE for the Scala programming language. It provides advanced editing, debugging, and refactoring tools, as well as integration with popular build tools and version control systems.
  2. Code::Blocks

    The IDE with all the features you need, having a consistent look, feel and operation across platforms.

Code Completion for Swift Developers

  1. Xcode

    Xcode is Apple's integrated development environment (IDE) for creating apps for Mac, iPhone, iPad, Apple Watch, and Apple TV. It includes a powerful suite of tools for designing, coding, testing, and debugging apps, and provides a unified workflow for all Apple platforms.
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