NestLight

Syntax highlighting for languages embedded in strings, in Visual Studio 2022 / 2026.

Ever written HTML, SQL or CSS inside a string and seen it all painted the same flat color? NestLight recognizes code embedded in string literals and colors it as its own language. It only provides colors: it never edits, formats or rewrites your code.

A string is highlighted only when you mark it, with a tag (such as html...) or a marker comment (such as // language=sql). NestLight never guesses from the content.

Supported

• Hosts: JavaScript / TypeScript, C#, Python and C++
• Embedded languages: HTML, CSS, SQL, JSON, GraphQL, XML, Markdown, YAML, regular expressions and shaders (GLSL, WGSL)

Learn more

Usage examples, marker syntax, color customization and known limitations are documented on GitHub:

github.com/Maharal/nestlight-vs

Found a bug or want a new language? Open an issue.

MIT licensed. Copyright (c) 2026 Raphael Augusto Teixeira Silva.