YouCompleteMe

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YouCompleteMe is a code-completion engine for Vim that provides fast, as-you-type, fuzzy-search code completion, comprehension, and refactoring. It supports multiple programming languages and offers IDE-like features directly within Vim.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is YouCompleteMe?

YouCompleteMe is a powerful, open-source code-completion engine specifically designed for the Vim text editor. It offers fast, as-you-type, fuzzy-search capabilities for code completion, comprehension, and refactoring. The tool integrates several completion engines, including a clangd-based engine for C-family languages, Jedi for Python, OmniSharp-Roslyn for C#, Gopls for Go, TSServer for JavaScript/TypeScript, rust-analyzer for Rust, and jdt.ls for Java. It also supports the Language Server Protocol for broader language compatibility and an identifier-based engine for all programming languages. Beyond basic completion, YouCompleteMe provides advanced IDE-like features such as signature help, finding declarations/definitions/usages, interactive symbol search, type information display, documentation in preview windows, code formatting, and semantic renaming across files. It also includes diagnostic display features, showing warnings and errors in real-time without needing to save the file.

Best used for

Ideal for developers who need to significantly enhance their Vim text editor with advanced code completion, comprehension, and refactoring features. Especially valuable for those working with C-family languages, Python, Java, C#, Go, Rust, or JavaScript/TypeScript, seeking an IDE-like experience directly within Vim.

Common actions

autocomplete code

refactor code

navigate code

debug code

enhance IDE

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Capabilities

Key features

As-you-type code completion
Fuzzy-search completion
Multi-language semantic completion
Real-time diagnostic display
IDE-like refactoring
Signature help display
Symbol search and navigation

Target Audience

developer

Integrations

vundleultisnips

Pricing & Plans

Open Source

Free

FAQs

What programming languages does YouCompleteMe support?

YouCompleteMe supports a wide range of languages including C/C++/Objective-C/CUDA via clangd, Python with Jedi, C# with OmniSharp-Roslyn, Go with Gopls, JavaScript/TypeScript with TSServer, Rust with rust-analyzer, and Java with jdt.ls. It also offers a generic Language Server Protocol implementation and an identifier-based engine for all languages.

What are the minimum system requirements for YouCompleteMe?

YouCompleteMe requires Vim 9.1.0016 or Neovim 0.5.0, both compiled with Python 3.12 or later. It also needs CMake 3.13 or greater and a C++17 compatible compiler (GCC 8, Clang 7, or MSVC 15.7). Specific language completers may have additional runtime requirements.

Does YouCompleteMe provide refactoring capabilities?

Yes, YouCompleteMe offers several refactoring features. These include fixing common coding errors, semantic renaming of variables across files, code formatting, and removing/sorting imports. The specific refactoring options available can vary depending on the language and its corresponding semantic completer.

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Open Source & Models DevOps & Infrastructure No-Code / Low-Code Testing & QA Backend & APIs Prompt Engineering

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This tool also appears in

Productivity & Business › Workflow Automation

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