JavaScript Beautifier (Format JS & TypeScript)
Beautify minified JavaScript, restore code structure, and format modern ES6+ / TypeScript code.
TL;DR: JavaScript Beautifier decompresses minified JavaScript, applying standardized indentation, brace alignment, and line spacing.
What Is a JavaScript Beautifier and How Does It Work?
A JavaScript Beautifier is a source code formatting tool that parses minified, obfuscated, or messy JS/TS scripts into an Abstract Syntax Tree (AST) and re-renders the code with consistent indentation, proper brace placement (`{}`), standardized operator spacing, and clear statement terminators according to ECMAScript standard conventions.
How to Use the JavaScript Beautifier
Our JavaScript Beautifier is engineered for rapid developer workflow, high-performance in-browser execution, and complete code privacy.
- Paste your minified or unformatted JavaScript or TypeScript code into the editor.
- Select your indentation style (2 spaces, 4 spaces, or Tab).
- Configure brace style (Collapse, Expand, or End of Line).
- Click 'Beautify JavaScript' to execute instant client-side formatting.
- Copy formatted code or download as a `.js` / `.ts` file.
Key Capabilities & Developer Best Practices
- Fast In-Browser Processing: Zero server latency; code formatting, validation, and transformations execute in real time.
- Complete Data Confidentiality: Work with sensitive API keys, production configs, and database records safely on your local device.
- Standards-Compliant Output: Generates clean, RFC-compliant code ready for production deployment and clean Git diffs.
100% Client-Side Privacy Guarantee
All parsing, formatting, validation, cryptographic hashing, and code transformations occur 100% locally inside your web browser. Your source code, database queries, and private payloads are never uploaded to any remote server.
Frequently Asked Questions
- A JavaScript beautifier is a formatting tool that restores readable indentation, line breaks, and whitespace to compressed or poorly formatted JS and TypeScript code.
- Paste your minified `.min.js` file content into NexLove's JavaScript Beautifier and click 'Beautify JavaScript' to expand bundled single-line scripts into structured functions.
- The beautifier reconstructs code indentation and structural control flow, but shortened variable names (e.g. `var a, b, c`) cannot be renamed to their original names since minifiers strip source maps.
- Yes. Arrow functions, async/await, classes, optional chaining (`?.`), nullish coalescing (`??`), and TypeScript type annotations are fully supported.
- No. The code execution flow, variable scopes, closures, and logic remain 100% identical.
- Yes. All parsing and formatting occur 100% client-side in your web browser with zero server uploads.
- Yes. You can select whether opening curly braces stay on the same line (K&R / 1TBS) or drop to a new line (Allman).
- While this tool handles JavaScript objects, for strict RFC 8259 JSON validation and key sorting, we recommend our dedicated JSON Formatter.
Embed This Tool
Add the live JavaScript Beautifier to your own website with this lightweight responsive iframe:
<iframe src="https://nexlove.org/embed/js-beautifier.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="JavaScript Beautifier — NexLove.org" loading="lazy"></iframe>