Best Javascript Utilities & Libraries in 2025

Search millions of open source JavaScript packages on Skypack. Free to use.

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more.

Key DocRaptor features:

Ease of Use Customizable High-Quality Rendering Compliance

Try for free paid Free Trial $15.0 / Monthly (125+ Documents)

Award-winning JavaScript charting library & Qlik Sense extensions from a global leader in data visualization! Loved by thousands of happy customers, including over 75% of Fortune 500 companies & over half of the top 1000 software vendors worldwide.

Key AnyChart features:

Chart types Data formats Integrations Docs

Open Source freemium $49.0 / One-off (Next Unicorn license for startups)

A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application.

Key Highcharts features:

Customization Cross-Browser Compatibility Wide Range of Chart Types Interactive Features

JavaScript charts for web and mobile apps.

Key FusionCharts features:

Extensive Chart Options Interactive Visualizations Cross-Platform Support Comprehensive Documentation

Open Source

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. .

Key D3.js features:

Powerful Visualization Data Binding Community and Ecosystem Flexibility

Open Source

Easy, object oriented client side graphs for designers and developers.

Key Chart.js features:

Open Source Ease of Use Lightweight Responsive Design

Open Source

Interactive charts for browsers and mobile devices.

Key Google Charts features:

Easy Integration Wide Variety of Chart Types Dynamic Data Handling Cross-Browser Compatibility

ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!

Key ZingChart features:

Feature-Rich Performance Cross-Platform Support Ease of Use

freemium $99.0 / Annually (Website license for a single website or domain)

Advanced javascript charting library that will suit any data visualization need.

Key amCharts features:

Comprehensive Feature Set Ease of Use Customizability Responsive Design

Open Source

Lo-Dash is a drop-in replacement for Underscore.

Key Lo-Dash features:

Performance Consistency Modularity Community and Support

Open Source

Chartist.JS - simple responsive charts.

Key Chartist.js features:

Simple to Use SVG-Based Responsive Design Customizable

Ipregistry is a fast, reliable IP geolocation and threat data API. People use Ipregistry to personalize content, analyze traffic, target ads, block countries but also to prevent abuse by detecting Proxy and Tor users, known spammers and bad bots.

Key Ipregistry features:

Accuracy Comprehensive Data Ease of Integration Scalability

Open Source freemium $5.0 (40,000 lookups)

generate HTML with python 3. A DOM API, JavaScript API and many other cool features. Can be used as a fast prototyping tool. pip install domonic --upgrade.

Key Domonic features:

Pythonic HTML Generation Multi-Purpose Library No Template Language Required JavaScript API Familiarity

Open Source