JS / JSON Minifier
Minify JavaScript and JSON code
Frequently Asked Questions
What does the JS/JSON minifier do?
The minifier strips whitespace, newlines, and comments to shrink JavaScript or JSON for transport and deployment. Minified JSON still parses cleanly with any standard parser, and minified JS remains executable.
When do I need to minify?
Squeezing JSON into a URL or cookie; hand-minifying JS for static sites that have no build pipeline; compressing inline scripts in <script> tags inside HTML; reducing configuration file size for transmission.
Will it mangle or rename variables?
No. This tool does "minify" only (removes whitespace and comments) — no "mangle" (renaming variables/properties). For aggressive optimization, reach for Terser, esbuild, or SWC during your build step.
What if my minified code breaks?
Usual suspects: relying on ASI (automatic semicolon insertion) in fragile ways, JSON that contains comments (standard JSON disallows them), or strings with unescaped newlines. Make sure the source is valid JS/JSON before minifying.
Is my code uploaded?
No. Everything runs locally, so business logic in scripts stays on your device.
How is this different from bundler-level minification?
Bundlers (Webpack, Vite, Rollup) minify as part of a full build pipeline — ideal for complete projects. DevToolkit's minifier targets ad-hoc snippets, demos, and small chunks of JS/JSON in emails or templates. They serve different needs and coexist happily.