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UglifyJS VS TrimCSS

Compare UglifyJS VS TrimCSS and see what are their differences

UglifyJS

JavaScript minifier, beautifier, mangler and parser toolkit.

Rating
0 reviews
Pricing
Open source
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Alternatives Is it good?
TrimCSS

Scan your website, find the CSS rules your pages never use and download smaller stylesheets. Free for up to 5 pages, no sign up.

Rating
0 reviews
Pricing
Freemium $9 / One-off (Site pass: €9 one-off, one website for 30 days, 200 pages a sca)
Promote on VibeVoted
Alternatives Is it good?
Bluebox.ai
Bluebox gives coding agents the production context they are missing. It briefs your agent with live runtime behavior before a change, investigates incidents, explains likely root cause, and returns a GitHub issue you review. Free to start. sponsored

Which is more popular?

Based on our record, UglifyJS seems to be more popular. It has been mentioned 1 time since March 2021.

social mentions
1 vs 0
Tool popularity
100% vs 0%
alternatives listed
101 vs 5

Base details

Website, pricing, platforms and company facts side by side.

UglifyJS
TrimCSS
Website lisperator.net trimcss.com
Pricing
Open source
Freemium $9 / One-off (Site pass: €9 one-off, one website for 30 days, 200 pages a sca) Official pricing
Platforms —
Web
Company — 2026
Listed in
Tool Web Application Bundler Developer Tools Development +1
CSS Tools Web Development Tools Website Optimization Developer Tools SEO Tools CSS Tricks +3

About UglifyJS and TrimCSS

In their own words, as submitted to SaaSHub.

UglifyJS
TrimCSS

No description of UglifyJS yet.

TrimCSS removes unused CSS from a whole website, not just one page. Enter your web address and it reads your sitemap and menu links, checks each page against every rule in your stylesheets, and gives you back a smaller file containing only the CSS your site really uses. It is careful about what...

Read more about TrimCSS

Features and specs

What each product offers, as listed by its team.

UglifyJS 4 features
TrimCSS 6 features
  • Minification
    UglifyJS effectively reduces the file size of JavaScript by removing whitespace, shortening variable names, and eliminating unnecessary code, which can lead to faster load times in web applications.
  • Maturity and Stability
    As a mature and well-established tool, UglifyJS has a long history of usage and a strong community, making it a reliable choice for JavaScript minification with less risk of encountering severe bugs.
  • Customization
    UglifyJS offers various options and configurations that allow developers to control the minification process, such as toggling specific optimizations and preserving certain comments.
  • Compression
    Besides minification, UglifyJS provides compression options which further optimize the JavaScript code by evaluating constant expressions and removing unreachable code.

Possible disadvantages

  • Source Mapping Complexity
    Generating source maps with UglifyJS can sometimes be complex and might not always accurately map minified code back to the original source, complicating debugging efforts.
  • Transformations Side Effects
    Some of the aggressive transformations made by UglifyJS could potentially introduce bugs if the original code relies on exact syntax structure or has side effects that depend on expression evaluation order.
  • Limited ES6+ Support
    Historically, UglifyJS has lagged in support for newer ECMAScript features compared to other modern minifiers, which might cause issues when dealing with ES6+ syntax without transpiling it first.
  • Error Diagnosis
    When errors occur during the minification process, UglifyJS may not always provide clear or detailed error messages, which can make it difficult to diagnose and fix issues.
  • Remove unused CSS
    Remove unused CSS
  • Whole-site scan
    Whole-site scan
  • CSS minifier
    CSS minifier
  • Safelist
    Safelist
  • Paste CSS mode
    Paste CSS mode
  • No sign-up required
    No sign-up required

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
UglifyJS
TrimCSS
100% 100%
Tool
0% 0%
60% 60%
Developer Tools
40% 40%
100% 100%
Web Application Bundler
0% 0%
0% 0%
Web Development Tools
100% 100%

User comments

Share your experience with using UglifyJS and TrimCSS. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

UglifyJS 1 mention
TrimCSS 0 mentions
  • Overview of the next-gen frontend dev tools
    There are many minifiers such as terser and uglify. But, because minifying also require to parse the JS, it is actually possible to use esbuild and SWC to minify the code. Here's a benchmark of the main minifiers. - Source: dev.to / almost 4 years ago

Tracking TrimCSS since Oct 2026.

Alternatives to UglifyJS and TrimCSS

When comparing UglifyJS and TrimCSS, you can also consider the following products.

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