Open a notebook. Read it like a document.

Use the viewer on this page: choose the .ipynb file or drop it into the page, and it renders immediately in your browser as a scrollable document. The file is read with the browser File API and never uploaded — the viewer works even with no network connection after the page has loaded.

An IPYNB viewer is a tool that opens a Jupyter notebook file (JSON) and renders it as a readable document: markdown cells as typographic text, code cells with syntax colours and prompts, and each code cell's outputs — plots, tables, text — laid out in place. This viewer does all of that in the browser without installing anything.

You have three no-install routes: a browser viewer like this one, which renders the file after you pick it; GitHub and VS Code for the Web, which both render notebooks pushed to a repository; or command-line conversion to HTML with jupyter nbconvert --to html, which produces a file you can open anywhere. Of the three, only a viewer keeps the file local and shows everything at once without an upload.

It is free, with no account, no file-size gate and no watermark. The rendering runs in your browser tab, so there is also no server-side cost per notebook — that is the whole reason the tool can stay free and stay offline.

The notebook is parsed inside your own tab and nothing is sent to a server, so the file never leaves your device. The viewer also sanitises the notebook's markdown and HTML with DOMPurify before rendering, so scripts and iframes stored in the file are not executed.

No. An .ipynb file stores the outputs produced when the notebook last ran; the viewer displays those stored outputs as-is. It neither re-runs code nor can execute anything — that is also why no kernel is needed.

Yes, after downloading it: in Colab use File → Download → .ipynb, then open the file in this viewer. Colab notebooks are ordinary .ipynb files, so markdown, plots, tables and math all render the same as they do for a locally saved notebook.

Yes — both download as .ipynb too. In Kaggle, use the download button on the notebook and export as .ipynb; in Deepnote, the export menu offers Notebook (.ipynb). Once the file is on your device, the viewer treats it like any other notebook.

Everything that has a static form: PNG, JPEG, GIF, WebP and SVG images, HTML tables and outputs, text/plain, JSON and stream text with ANSI colours, plus full error tracebacks. Interactive widgets and file downloads have no static form, so the viewer shows a short note in their place.

Yes — the viewer and the converter are the same team. Open the notebook in the converter, then preview its exact pagination and download the PDF; the document you read here is the document that prints. Use the button above or the links at the bottom of the page.

Yes. The document reflows to the screen width, and the same .ipynb file can be chosen from the file picker on mobile browsers. Plots and tables scale down to fit without being cut off.

No. The viewer keeps no copy of the file, in the browser or anywhere else — close the tab and the notebook is gone. Nothing is uploaded for the same reason there is no account: there is no server to receive it.