Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics. No signup or account required.
Removes unnecessary whitespace, comments, and optional closing tags from HTML code to reduce file size without altering rendered output. Everything runs locally in your browser — nothing is uploaded.
Removes unnecessary whitespace, comments, and trailing semicolons from CSS, while merging identical selector blocks where safe to do so. Everything runs locally in your browser — nothing is uploaded.
Check JavaScript code for syntax errors using the Function constructor. Validate code before execution. Everything runs locally in your browser — nothing is uploaded.
Displays an animated spinning wheel that randomly selects one entry from a customizable list of names or options. Everything runs locally in your browser — nothing is uploaded.
Extracts the audio track from uploaded video files (MP4, MOV, AVI, WebM) and encodes it as a high-quality MP3 file. No signup or account required.
JS Minifier lets you strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics. No signup or account required.. It works on any device with a modern web browser.
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics. No signup or account required. It runs entirely in your browser — no software installation or data uploads required.
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Yes. After the initial page load, JS Minifier runs entirely on your device with no internet connection needed. All processing is done locally.
Comments, extra whitespace, line breaks, and optional local variable name shortening. The output is functionally identical JavaScript with a significantly smaller file size.
No. The Terser engine preserves execution semantics. It only removes dead code, comments, and whitespace — never logic, function calls, or variable references.
This tool focuses on minification. For beautifying or formatting JavaScript, use the Code Beautifier tool instead.
Typically 30-70% reduction depending on how much whitespace and commenting your original code has. Code with extensive comments sees the largest savings.
No. Minification runs entirely in your browser using the Terser library. Your JavaScript source never leaves your device.