CSS Minifier Help Compress and minify CSS files to reduce file size and improve website loading speed. Quick Start

Paste your CSS code into the text area or upload a CSS file Enable advanced options if you have Pro access (preserve comments, aggressive minification) Click the "Minify CSS" button to process your code View the minification results including size reduction statistics Copy the minified CSS to clipboard or download as a file For bulk processing, use the Bulk Mode to minify multiple CSS files at once

Features Standard Features (Free)

Basic CSS Minification - Remove whitespace, comments, and unnecessary characters Size Reduction Statistics - See exactly how much space you've saved Copy to Clipboard - Quickly copy minified CSS for immediate use Download Results - Save minified CSS as a file Daily Usage Limits - Process up to 10 files per day on free tier

Pro Features

Preserve Important Comments - Keep licensing and attribution comments marked with /! / Aggressive Minification - Advanced compression techniques for maximum file size reduction Bulk Processing - Upload CSV files to minify multiple CSS files at once Processing History - Track all your minification jobs and statistics Unlimited Daily Usage - No limits on how many files you can process Priority Support - Get help when you need it

How to Use Single File Minification

Navigate to the CSS Minifier tool page Paste your CSS code into the large text area (Pro users) Enable optional features:

Check "Preserve Important Comments" to keep /! / style comments Check "Aggressive Minification" for maximum compression

Click "Minify CSS" button Review the results showing original size, minified size, and percentage reduction Use "Copy to Clipboard" to copy the minified CSS Or use "Download CSS" to save as a file

Bulk Processing (Pro Only)

Navigate to the Bulk CSS Minifier page Prepare a CSV file with this format:

filename,css_code style.css,"body { color: red; }" navbar.css,".navbar { padding: 10px; }"

Drag and drop your CSV file or click to upload Review the file information (size, number of files) Click "Process All Files" Wait for processing to complete Download results as CSV, JSON, or ZIP file

FAQ Q: What does CSS minification do? A: CSS minification removes unnecessary characters like whitespace, comments, and line breaks to reduce file size and improve load times. The functionality of your CSS remains exactly the same. Q: Will minification break my CSS? A: No, minification only removes unnecessary characters while preserving the functionality of your CSS code. All selectors, properties, and values remain intact. Q: Can I preserve important comments? A: Yes, Pro users can preserve comments marked with /! / which are often used for licenses or attribution. This is useful for open source projects or when you need to maintain copyright notices. Q: What is aggressive minification? A: Aggressive minification applies advanced techniques like shortening color codes (#ffffff → #fff → white), removing redundant values (padding: 10px 10px 10px 10px → padding: 10px), and optimizing selectors for maximum compression. This can provide 5-15% additional size reduction beyond standard minification. Q: How much size reduction can I expect? A: Typical CSS files see 20-40% size reduction with standard minification and 30-50% with aggressive minification. The exact amount depends on how your original CSS is formatted. Q: Can I minify inline CSS? A: Yes! Just copy the CSS from your style tags and paste it into the tool. You can then copy the minified output back into your HTML. Q: What about CSS preprocessors like SASS or LESS? A: You should compile your SASS/LESS to regular CSS first, then use this tool to minify the output. This tool works only with standard CSS syntax. Q: Is bulk processing available for free users? A: No, bulk processing is a Pro feature. Free users can minify one file at a time. Upgrade to Pro to process multiple files simultaneously. Q: Will minification affect my CSS sourcemaps? A: Minification does not generate or maintain sourcemaps. If you need sourcemaps for debugging, you should keep your original unminified CSS files and use minified versions only in production. Q: Can I undo minification? A: No, minification is a one-way process. Always keep a copy of your original, unminified CSS files for future editing and maintenance. Examples Example 1: Basic Minification Input: cssbody { color: #ff0000; padding: 10px 10px 10px 10px; margin: 0px; }

.container { max-width: 1200px; margin: 0 auto; } Output: cssbody{color:#f00;padding:10px;margin:0}.container{max-width:1200px;margin:0 auto} Reduction: ~65% smaller Example 2: Preserving Important Comments (Pro) Input: css/! Bootstrap v5.3.0 Copyright 2011-2023 The Bootstrap Authors Licensed under MIT /

/ Regular comment to be removed /

body { font-family: Arial, sans-serif; } Output (with preserve comments enabled): css/! Bootstrap v5.3.0 Copyright 2011-2023 The Bootstrap Authors Licensed under MIT */body{font-family:Arial,sans-serif} Example 3: Aggressive Minification (Pro) Input: css.button { background-color: #ffffff; padding: 10px 10px 10px 10px; margin: 0px 0px 0px 0px; } Output: css.button{background-color:#fff;padding:10px;margin:0} Troubleshooting "Daily limit reached" error

Free users are limited to 10 minifications per day Sign in to track your usage across devices Upgrade to Pro for unlimited minifications

"Invalid CSS syntax" warning

The tool may still minify CSS with syntax errors, but results might be unexpected Validate your CSS before minifying using a CSS validator Check for unclosed brackets or missing semicolons

Minified CSS doesn't work

Verify the original CSS worked before minification Check if you're using vendor prefixes or experimental CSS that needs special handling Try standard minification instead of aggressive mode

File upload fails

Ensure your CSV file follows the correct format: filename,css_code Check that file size doesn't exceed tier limits (1MB free, 5MB basic, 10MB gold, 50MB ultimate) Verify CSV is properly formatted with quoted values containing commas

Processing is slow

Large CSS files (>1MB) may take several seconds to process Bulk processing processes files sequentially, so large batches take longer Pro users get priority processing for faster results

Need More Help?

Visit our FAQ page for common questions Contact support at support@bulkcreator.com Check out our blog for CSS optimization tips Join our community forum for discussions and tips

Technical Details

Supports standard CSS3 syntax Preserves all CSS functionality while removing unnecessary characters Compatible with modern browsers and all CSS frameworks Handles media queries, keyframes, and pseudo-selectors correctly UTF-8 encoding support for international characters

Pro Tip: Always test your minified CSS in a staging environment before deploying to production!