Asset Minifier (CSS & JS)

Paste CSS or JS, minify, copy, or download a .min.css / .min.js.

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Input CSS
0 bytes
Advanced settings
Errors
    Warnings
      Minified CSS
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      Original
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      Minified
      0 bytes
      Savings
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      JS Minifier

      Switch to JavaScript minification below — works like the CSS tool.

      Input JS
      0 bytes
      Advanced settings
      Errors
        Warnings
          Minified JS
          0 bytes
          Original
          0 bytes
          Minified
          0 bytes
          Savings
          0%

          Minify CSS and JavaScript — fast, clean, and copy-ready

          Yolosoft Packly Minifier helps you reduce file size and ship faster front-end assets. Paste your CSS or JavaScript, tune advanced settings, and get a minified output you can copy instantly or download as a ZIP.

          Need automation? Use the public JSON APIs to minify assets from scripts, CI/CD, or internal tooling.

          How it works Public API API Docs

          Quick facts

          0
          Languages
          CSS + JS
          0
          Export options
          copy / file / ZIP
          0
          Docs page
          API + examples
          ZIP
          Download output
          .min.css / .min.js

          For automation details (routes, payloads, and examples), use the dedicated docs page: /minifier/docs.

          Why minify assets?

          Minification removes unnecessary characters (whitespace, comments, long identifiers when safe) while preserving behavior. The result is smaller downloads, faster page loads, and improved caching efficiency.

          Faster delivery

          Smaller bundles typically mean less network time and quicker rendering on mobile and desktop.

          Cleaner deploys

          Generate deterministic .min outputs for release pipelines and static hosting.

          Copy or ZIP

          Quick copy for snippets, or download a ZIP containing styles.min.css / scripts.min.js.

          Advanced controls

          Toggle important comment preservation, debug stripping, and other settings to match your project’s needs.

          API-first

          Automate stable minification steps with a public API surface. The docs page contains exact routes and request examples.

          Validation & limits

          Requests are validated and size-limited to reduce abuse and keep responses predictable.

          Public API for scripts and CI/CD

          If you want repeatable builds, the Minifier can be integrated from scripts and CI/CD. The public API supports JSON minify and ZIP downloads so you can automate the same workflow you use in the UI.

          Read API Docs

          How it works

          1. Send CSS or JS as JSON: InputCss or InputJs.
          2. Optionally supply advanced settings to match your project’s needs.
          3. Review output and warnings in your pipeline logs.
          4. If you need an artifact, use the ZIP download flow described in the docs.

          Packly roadmap (SEO-ready structure)

          This page is intentionally structured as independent sections so new tool pages and their SEO blocks can be added without disturbing the existing Minifier experience.

          Future utilities (examples)

          As Packly grows, you may see additional focused utilities alongside the Minifier. Any roadmap items here are aspirational and may change.

          • JSON formatter / validator
          • HTML formatter / minifier
          • URL encoder / decoder
          • Base64 encoder / decoder
          • Hashing utilities (SHA-256, etc.)

          What stays consistent

          Packly tools aim to keep a predictable interface:

          • Clear UI with copy-friendly output
          • Public API endpoints for automation (when applicable)
          • Defensive validation and reasonable payload limits
          • Consistent error reporting and HTTP status usage

          FAQ

          Common questions about the CSS & JS minifier, the public API, and typical integration patterns.

          Minification is designed to preserve behavior, but advanced optimizations can expose edge cases in unusual code. If you have strict requirements, start with conservative settings and validate your output in your test suite.

          Yes. Start by validating output in the UI, then automate the same settings in CI/CD. The API docs page includes routes, request bodies, and example calls.

          The Minifier API documentation is available at /minifier/docs.

          Paste the final CSS/JS artifact you plan to ship (for example, after bundling). The Minifier focuses on producing a compact output for an already-prepared input.

          Yes. The UI supports downloading a ZIP that contains the minified output file.

          Today, the endpoints accept a single input payload per request. If you have multiple files, call the API per file (or concatenate inputs when appropriate for your use case).

          The minifier APIs are designed for request/response processing. If you operate this service in production, treat inputs as sensitive and ensure your hosting, logging, and monitoring policies align with your security needs.

          Yes. The UI includes options to preserve important comments when you need to keep license banners or special annotations.

          Minification is one part of a build pipeline. Bundlers handle module resolution and tree shaking; this tool focuses on producing a compact output for an already-prepared CSS/JS input.

          Yes. Use the ZIP endpoints (CSS or JS). On success you’ll receive a ZIP containing the corresponding minified file.

          Packly is built as a suite of small, focused utilities. New tools may be added over time, and this page is structured so new SEO sections can be appended without rewriting the existing minifier content.