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A pure JavaScript implementation of git for node and browsers!
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.extra fix: fixes a bug parsing the git index when ctime is blank (#378) Aug 14, 2018
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__tests__ fix: support 'status' and 'statusMatrix' on empty branches (#762) Jun 18, 2019
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.gitattributes chore: fixed wildcards in .gitattributes (#573) Nov 9, 2018
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.releaserc make twitter post link to the exact version released (#300) Jun 28, 2018 chore: Add a code of conduct to foster sense of community (#175) May 11, 2018 Update (#651) Dec 14, 2018 fix: Switch from The Unlicense to The MIT License (#105) Mar 19, 2018 fix: replace 'nick' by a simple CSP-friendly templating function (#733) May 18, 2019
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cli.js fix: Bugfix resolving annotated tags in .git/packed-refs (#469) Sep 19, 2018
jest.config.js ci: expose GH_TOKEN to semantic-release script (#474) Sep 23, 2018
karma.conf.js feat: prefer fs.promises if available (#730) May 11, 2019
package-lock.json fix: update "diff-lines" dep (#760) Jun 18, 2019
package-scripts.js chore: enhanced docs (#722) Apr 17, 2019
package.json fix: update "diff-lines" dep (#760) Jun 18, 2019
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A pure JavaScript implementation of git for node and browsers!

Latest release:

current npm version required node version written in ECMAScript 2017+ license gzip size install size

Master branch status:

semantic-release Build Status dependencies Known Vulnerabilities FOSSA Status


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Browser Support:

Sauce Labs Test Status (for master branch)

Most recent build:

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isomorphic-git is a pure JavaScript implementation of git that works in node and browser environments (including WebWorkers and ServiceWorkers). This means it can be used to read and write to git repositories, as well as fetch from and push to git remotes like Github.

Isomorphic-git aims for 100% interoperability with the canonical git implementation. This means it does all its operations by modifying files in a ".git" directory just like the git you are used to. The included isogit CLI can operate on git repositories on your desktop or server.

isomorphic-git aims to be a complete solution with no assembly required. I've tried carefully to design the API so it is easy to use all the features, without paying a penalty in bundle size. By providing functionality as separate functions instead of an object oriented API, code bundlers like Webpack will only include the functionality your application actually uses. (Or at least that's the goal.)

The project includes type definitions so you can enjoy static type-checking and intelligent code completion in editors like VS Code and CodeSandbox.

Getting Started

The "isomorphic" in isomorphic-git means it works equally well on the server or the browser. That's tricky to do since git uses the file system, and browsers don't have an fs module. So rather than relying on the fs module, isomorphic-git is BYOFS (Bring Your Own File System). Before you can use most isomorphic-git functions, you need to set the fs module via the plugin system.

If you're only using isomorphic-git in Node, you can just use the native fs module.

const git = require('isomorphic-git');
const fs = require('fs');
git.plugins.set('fs', fs)

If you're writing code for the browser though, you'll need something that emulates the fs API. At the time of writing, the most complete option is BrowserFS. Compared to Node, there is an extra setup step to configure BrowserFS, as seen below:

<script src=""></script>
<script src=""></script>
BrowserFS.configure({ fs: "IndexedDB", options: {} }, function (err) {
  if (err) return console.log(err);
  window.fs = BrowserFS.BFSRequire("fs");
  git.plugins.set('fs', window.fs);

Besides IndexedDB, BrowserFS supports many different backends with different performance characteristics, as well as advanced configurations such as: multiple mounting points, and overlaying a writeable filesystem on top of a read-only filesystem. You don't need to know about all these features, but familiarizing yourself with the different options may be necessary if you hit a storage limit or performance bottleneck using the IndexedDB backend I suggested above.

View the full Getting Started guide on the docs website.

Then check out the Useful Snippets page, which includes even more sample code written by the community!

CORS support

Unfortunately, due to the same-origin policy by default isomorphic-git can only clone from the same origin as the webpage it is running on. This is terribly inconvenient, as it means for all practical purposes cloning and pushing repos must be done through a proxy.

For this purpose @isomorphic-git/cors-proxy exists which you can clone or npm install. For testing or small projects, you can also use - a free proxy sponsored by Clever Cloud.

I'm hoping to get CORS headers added to all the major Git hosting platforms eventually, and will list my progress here:

Service Supports CORS requests
Gogs (self-hosted)
Gitea (self-hosted)
Azure DevOps (Usage Note: requires noGitSuffix: true and authentication)
Gitlab My PR was rejected, but the issue is still open!

It is literally just two lines of code to add the CORS headers!! Easy stuff. Surely it will happen.

Using as an npm module

You can install it from npm.

npm install --save isomorphic-git

In the package.json you'll see there are actually 4 different versions:

  "main": "dist/for-node/isomorphic-git/index.js",
  "module": "dist/for-future/isomorphic-git/index.js",
  "unpkg": "dist/bundle.umd.min.js",

This deserves a brief explanation.

  • the "main" version is for node.
  • the "module" version is for webpack or other browser bundlers.
  • the "unpkg" version is the UMD build.

isogit CLI

Isomorphic-git comes with a simple CLI tool, named isogit because isomorphic-git is a lot to type. It is really just a thin shell that translates command line arguments into the equivalent JS API commands. So you should be able to run any current or future isomorphic-git commands using the CLI.

It always starts with an the assumption that the current working directory is a git root. E.g. { dir: '.' }.

It uses minimisted to parse command line options and will print out the equivalent JS command and pretty-print the output JSON.

The CLI is more of a lark for quickly testing isomorphic-git and isn't really meant as a git CLI replacement.

Supported Git commands

This project follows semantic versioning, so I may continue to make changes to the API but they will always be backwards compatible unless there is a major version bump.




Share your questions and ideas with us! We love that. You can find us in our Gitter chatroom or just create an issue here on Github! We are also @IsomorphicGit on Twitter.

Contributing to isomorphic-git

The development setup is similar to that of a large web application. The main difference is the ridiculous amount of hacks involved in the tests. We use Facebook's Jest for testing, which make doing TDD fast and fun, but we also used custom hacks so that the same tests will also run in the browser using Jasmine via Karma. We even have our own karma plugin for serving git repository test fixtures!

You'll need Node.js installed, but everything else is a devDependency.

git clone
cd isomorphic-git
npm install
npm test

Check out the CONTRIBUTING document for more instructions.

Who is using isomorphic-git?

Similar projects


Isomorphic-git would not have been possible without the pioneering work by @creationix and @chrisdickinson. Git is a tricky binary mess, and without their examples (and their modules!) I would not have been able to come even close to finishing this. They are geniuses ahead of their time.

Cross-browser device testing is provided by:




Thanks goes to these wonderful people (emoji key):

William Hilton

📝 🐛 💻 🎨 📖 💡 ⚠️



Marc MacLeod

🤔 🔍

Brett Zamir


Dan Allen

🐛 💻 🤔

Tomáš Hübelbauer

🐛 💻

Juan Campa

🐛 💻

Ira Miller


Rhys Arkins


Sean Larkin


Daniel Ruf



💻 📖 ⚠️

Hiroki Osame

💻 📖

Jakub Jankiewicz

💬 🐛 💻 💡 ⚠️


🐛 💻



Melvin Carvalho



Dima Sabanin

🐛 💻

Koutaro Chikuba

🐛 💻


💻 ⚠️ 🤔 🔍

David Duarte


Thomas Pytleski

🐛 💻

Vadim Markovtsev


Yu Shimura

🤔 💻 ⚠️

Dan Lynch


Jeffrey Wescott

🐛 💻



Tyler Smith


Bram Borggreve


Stefan Guggisberg

🐛 💻 ⚠️

Catalin Pirvu


Nicholas Nelson

💻 ⚠️

Anna Henningsen


Fabian Henneke

🐛 💻

This project follows the all-contributors specification. Contributions of any kind welcome!


Thank you to all our backers! 🙏 [Become a backer]


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This work is released under The MIT License

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