Deobfuscate JavaScript with controls for formatting, simplification, and evaluation in this browser tool.
JS Compressor
Compress JavaScript with the Closure Compiler and choose an optimization level and formatting options.
About JS Compressor
JS Compressor is a web-based tool that compresses JavaScript code using the Closure Compiler. It lets users select optimization levels, formatting preferences, input and output ECMAScript versions, and add extra JavaScript libraries to compilation. After processing, it displays original and compiled file sizes, compression ratio, and any compilation warnings or errors.
Key features
- Select optimization levels: whitespace only, simple, advanced
- Choose formatting options including pretty print
- Set input and output ECMAScript versions
- Add extra JavaScript libraries to compilation
- Displays original and compiled file sizes
- Shows compression ratio and compilation errors/warnings
Best for: Web developers who need to compress JavaScript code with configurable optimization and version settings.
Good for
- Supports multiple optimization levels for different compression needs
- Offers configurable input and output ECMAScript versions
- Allows adding additional JavaScript libraries to compilation
JS Compressor at a glance
- Website
- jscompressor.treblereel.dev
- Category
- Development › Programming Languages
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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JS Compressor FAQ
What optimization levels are available for compression?
Whitespace only, Simple, and Advanced optimization levels are offered.
Which ECMAScript versions are supported for input and output?
Input and output support versions from ECMAScript3 up to ECMASCRIPT_NEXT and STABLE.
What compilation results are displayed after processing?
The tool shows original size, compiled size, compression ratio, and any warnings or errors.
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