Code Reviews for Jupyter Notebooks

Say Goodbye to messy JSON diffs!
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Billy Lamberta

Tensorflow docs & tech writer at Google

As a popular open source project, receives many pull requests for our notebook documentation. I care about content—not the file format—and ReviewNB provides a quick way to view notebook diffs so reviewers can focus on the changes that matter.

Sylvain Gugger

Research scientist at

Our MOOC and the full documentation of our open-source library is build from notebooks and we have a lot of contributors who help perfect them. ReviewNB has been a lifesaver to help us quickly see diffs and post comments whenever we ask for something to tweak in a specific cell.

Miguel González-Fierro

Data Scientist at Microsoft

In our team at Microsoft, we have been using ReviewNB to review the Jupyter notebooks that we have in our open source repository ReviewNB has helped a lot to be more agile when doing code reviews.

Rohit Singh

Lead developer, ArcGIS API for Python

Esri has been an early adopter of Jupyter Notebooks, with the ArcGIS API for Python’s samples and guides written entirely as notebooks. Tracking notebook changes and reviewing pull requests wasn’t easy until ReviewNB came along. We can now see exactly what’s changed between the different revisions. Posting review comments inline using a WYSIWYG interface is tremendously useful as well.

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Install ReviewNB on any of your GitHub Repositories

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See Notebook Diff for any Commit or Pull Request


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Can we self host ReviewNB?

  • Yes. If you're interested in on-prem installation, please fill this form and we'll get in touch.

Does ReviewNB work with GitHub Enterprise?

  • Yes. Our self hosted installation works with GitHub Enterprise & both.

Does ReviewNB work with GitLab or BitBucket?

  • Not yet. Additional platform support is one of our most requested feature. Feel free to upvote/follow updates.

Which repositories can ReviewNB access?

  • We can only access repositories for which you have enabled ReviewNB on GitHub
  • You can enable/disable individual repository access at any time from GitHub

What GitHub permissions do you need?

  • Read repository contents to fetch notebooks and compute diff
  • Read repository metadata to fetch list of commits and PRs
  • Read-Write access to pull requests to read & write PR comments

How can we trust ReviewNB with our private repositories?

  • ReviewNB does NOT store any repository contents. Notebooks / Diffs / Comments / Commits / PRs, none of these are stored in ReviewNB
  • Anytime you open a diff, we make API calls to GitHub to fetch the data. We process the diff and serve it to your browser in real time
  • Any comments you write are also directly posted to GitHub & not stored in ReviewNB

What about GitHub access token security?

  • GitHub access tokens are stored with AES (Advanced Encryption Standard) encryption
  • Every time you logout and login, we generate a new GitHub access token. That way, your tokens are automatically rotated and the old one becomes defunct

Still, how can we trust ReviewNB?



I'm Amit Rathi, solo developer & entrepreneur behind ReviewNB. More about me


Jupyter is loved by many but version control remains a challenge. Talking to data scientists convinced me that it's a widespread problem & one worth solving. Besides, diff algorithms are fun to write :)


My aim is to make notebooks a first class entity in Data science & ML teams. We can achieve this by making notebooks play well with existing tools & processes instead of building expensive proprietary platforms.

We're building in the open. You can view upcoming features, vote on them,  and even request a new one.

Get in touch!