Skip to main content
Back to Developer Tools
Free tool Developer Tools CSS Popular

CSS Minifier

Strip comments and whitespace to shrink stylesheets for production.

10,496 runs this month 4.8 average rating Results in under 2 seconds

About CSS Minifier

CSS Minifier is a no-nonsense utility for engineers and technical marketers. Strip comments and whitespace to shrink stylesheets for production. Give it your text and it returns ready-to-paste code — no sign-up, no ceremony.

Everything is analysed locally in your browser. Your text is never uploaded, which makes this safe to use on unpublished drafts, client work and anything under NDA.

CSS Minifier is free to use with no account required. Signing in adds saved history, favourites and higher daily limits, and unlocks the other 311 tools on the platform.

How to use CSS Minifier

  1. 1

    Enter your text

    Paste your text into the workspace. The live counter shows characters and words as you type.

  2. 2

    Set your options

    Adjust the settings to match your use case. Defaults are chosen to be sensible for most people, so you can usually skip this step.

  3. 3

    Run the tool

    Press Run. Progress is shown while it works, and most runs finish in under two seconds.

  4. 4

    Review the result

    Check the generated code, then copy it straight into your page.

  5. 5

    Export or share

    Copy to clipboard, download the raw output, export to PDF, CSV or JSON, or share a link to this tool with your team.

Example

You enter

A 480-word draft blog post

You get back

480 words · 12 paragraphs · Flesch 62 · 2 min read

Features

Runs locally

Your text never leaves the browser, so it is safe for drafts and client work.

Valid, pasteable output

Generated markup is standards-compliant and ready for production.

Fast by default

Most runs complete in well under two seconds, with live progress while it works.

Export anywhere

Copy to clipboard or export to PDF, CSV, JSON or plain text in one click.

Privacy-aware

Anything that can be computed in your browser is — nothing is uploaded unless the job genuinely needs a server.

Free, no account needed

Use it immediately. Signing in adds history, favourites and higher limits.

Why teams use it

Stop paying for a single-purpose tool

CSS Minifier is one of 312 tools on the same account. One subscription replaces the handful of point solutions most developer teams end up stacking.

Get to the decision faster

The output is structured around what you will do next, not around what was easiest to measure. Less interpretation, fewer meetings.

Share results without a screenshot

Export to PDF or CSV, or send a link. Clients and colleagues see the same thing you do, formatted properly.

Works the same on every device

The full workspace — including tables and exports — works on a phone, a tablet and a 4K display without a separate app.

FAQ

CSS Minifier — frequently asked questions

Yes. CSS Minifier is free with no account required, subject to a fair-use daily limit. Creating a free account raises that limit and saves your history; paid plans remove it entirely.
Exact. This tool computes its result directly from what you enter, in your browser, using the same formulas you would apply by hand — there is no estimation involved.
No. Everything runs in the browser. There is nothing to download, no extension to approve and no desktop client to keep updated.
Free accounts get 25 tool runs a day across the whole platform. Starter raises that to 250, Professional to 1,500, and Business to 6,000. Enterprise is unlimited.
Yes — copy to clipboard, download the raw output, or export to PDF, CSV or JSON. Business and Enterprise plans can also white-label exports with your own logo and colours.
Most people pair it with the other developer tools on the platform — the related tools listed below are the ones opened most often in the same session. All 312 are included in the same account.
Keep going

Related tools

People who use CSS Minifier usually open these next.

Browse all 312 tools