Code Beautify
Free Online Tools like Beautifiers, Formatters, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel
Code Linting & Formatting
JSON Formatter & Validator
Format and validate JSON data so that it can easily be read by human beings. The JSON Formatter was created to help folks with debugging.
OXC
The JavaScript Oxidation Compiler. A collection of high-performance JavaScript tools written in Rust
ESLint
A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript. Maintain your code quality with ease.
Prettier
Opinionated Code Formatter. It enforces a consistent style by parsing your code and re-printing it with its own rules that take the maximum line length into account, wrapping code when necessary.
Biome
Format, lint, and more in a fraction of a second. A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.