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devvkit

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JS Minifier/Beautifier

Minify and beautify JavaScript with comment stripping and gzip sizing.

Input: 0 BOutput: 0 B
Input

Safe mode strips comments and collapses whitespace without renaming identifiers. Aggressive mode loads Terser on demand (first use) and performs full compression + mangling; it needs valid JS syntax. Gzip size uses the browser's native CompressionStream. Validation runs code in a throwaway Function: safe for non-executing checks.

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Minify and beautify JavaScript without changing semantics. Strips comments, collapses whitespace, validates with the browser parser, and estimates gzip size.

>[x]Features
  • -Comment stripping (line and block)
  • -Whitespace collapsing with string safety
  • -Beautifier with proper indentation
  • -Syntax validation via the browser parser
  • -Gzip size estimate using CompressionStream
  • -Download minified output as .js file
>>Use Cases
  • >Reducing asset size before publishing
  • >Preparing minified snippets for CDN inline scripts
  • >Cleaning up generated or compiled JavaScript for review
  • >Checking how much compression gzip adds

Frequently Asked Questions

>How aggressive is the minification??
Conservative. Comments are stripped and whitespace is collapsed, but identifiers and line structure are preserved, so the output is always safe and never changes semantics.
>Can it compress ES modules or modern syntax??
It works on any valid JavaScript, including modern syntax, since validation uses the browser's own parser.