Browserify

Free plan Web

What Browserify is

Browserify bundles JavaScript dependencies so browser code can use Node-style require() calls. It follows require() statements through a project’s dependency graph, including npm packages and modules found through relative paths or Node’s module lookup, then creates a JavaScript file that can be loaded with a script tag. The tool is available through a command-line interface and a JavaScript API; the CLI can also create a UMD bundle with its --standalone option. Browserify supports transforms and plugins, and its --debug option adds source maps. Bundles support process.nextTick(), __dirname, and __filename, with browser shims for Node core libraries such as events, stream, path, url, assert, buffer, util, querystring, http, vm, and crypto. The project says many NPM modules that do not perform I/O work after bundling, while other modules need additional work. It recommends Watchify for fast development rebuilds and Tinyify for optimized, tree-shaken production bundles. Browserify is free and MIT-licensed. The project’s security policy supports only the latest major version.

Who it suits

Browserify suits developers who want to bundle Node-style dependencies for browser use through a CLI or JavaScript API. It may require extra work for some NPM modules.

What it does well

Free and MIT-licensed.
Supports CLI and JavaScript API builds.
--debug adds source maps.
Supports transforms, plugins, and UMD bundles.

What to know first

Some NPM modules need additional work.
Security support covers only the latest major version.

Limits

Modules that perform I/O may need additional work, and many others only work when they do not perform I/O. Security support covers only the latest major version.

Getting started

Open the Browserify website
Install Node.js
Install Browserify globally with npm install -g browserify
Build bundles with the command line or JavaScript API
Add Watchify for cached development rebuilds or Tinyify for optimized production bundles

Verdict

Browserify offers dependency bundling, browser shims, and build options for browser-based JavaScript projects. Check module compatibility and the latest-major-only security support policy before adopting it.

Questions

Is Browserify free?

Yes. Browserify has a free plan and uses a free pricing model.

Where does Browserify run?

Browserify is listed for the web.

Can Browserify use npm modules?

Yes. It bundles modules installed by npm, along with relative paths and Node-style module paths.

Does Browserify support source maps?

Yes. The --debug option adds source maps to generated bundles.

Can Browserify create UMD bundles?

Yes. Its command-line interface supports UMD output with the --standalone option.

Is Browserify open source?

The GitHub repository identifies Browserify as MIT-licensed.

Facts from Browserify's own pages

Additional integration: The site points to Beefy and run-browser as tools for automating Browserify development. · browserify.org, 8 Oct 2026
API: The README documents using Browserify directly through its JavaScript API as well as from the command line. · github.com, 8 Oct 2026
Build formats: The command-line interface supports generating a UMD bundle with the --standalone option. · github.com, 8 Oct 2026
Built-in shims: The README lists browser-specific shims for many Node built-in modules, including assert, buffer, crypto, events, path, stream, and url. · github.com, 8 Oct 2026
Bundling: It recursively analyzes require() calls and bundles the dependency graph into a file that can be loaded with a script tag. · github.com, 8 Oct 2026
Compatibility limit: The project README says many NPM modules that do not perform I/O work after being browserified, while others require more work. · github.com, 8 Oct 2026
Core library shims: The site lists browser versions of Node core libraries including events, stream, path, url, assert, buffer, util, querystring, http, vm, and crypto. · browserify.org, 8 Oct 2026
Debugging: The --debug option adds source maps to bundles for debugging. · browserify.org, 8 Oct 2026
Dependency discovery: It parses require() calls to traverse the project dependency graph and bundle dependencies into a JavaScript file. · browserify.org, 8 Oct 2026
Development rebuilds: The site recommends Watchify, described as a compatible caching bundler for fast bundle rebuilds during development. · browserify.org, 8 Oct 2026
Install: The site instructs users to install Node.js and then install Browserify globally with npm install -g browserify. · browserify.org, 8 Oct 2026
License: The GitHub repository identifies its license as MIT. · github.com, 8 Oct 2026
Module sources: Browserify can bundle modules installed by npm and supports relative paths and module paths resolved using Node's module lookup algorithm. · github.com, 8 Oct 2026
Node compatibility: The site says process.nextTick(), __dirname, and __filename work in Browserify bundles. · browserify.org, 8 Oct 2026
NPM modules: The site says Browserify lets users use many NPM modules in the browser. · browserify.org, 8 Oct 2026
Optimized bundles: The site recommends tinyify for optimized, tree-shaked production bundles. · browserify.org, 8 Oct 2026
Production optimization: The site recommends Tinyify for optimized, tree-shaken production bundles. · browserify.org, 8 Oct 2026
Purpose: Browserify lets you use Node-style require() in browser code by bundling dependencies. · browserify.org, 8 Oct 2026
Security support: The project security policy says only the latest major version is supported and vulnerability reports should go through Tidelift. · github.com, 8 Oct 2026
Support: The official site directs users to the #browserify IRC channel on freenode or to contact @browserify on Twitter for help. · browserify.org, 8 Oct 2026
Transforms and plugins: The command-line options support transform modules, transform commands, and plugins. · github.com, 8 Oct 2026

Where Browserify stands on Freedom251

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