Source: https://seerepo.com/compare/jax-ml/jax/vs/tensorflow/tfjs
Markdown source: https://seerepo.com/compare/jax-ml/jax/vs/tensorflow/tfjs.md
Description: jax and tfjs share 3 technologies: jaxlib, opt-einsum, and ml-dtypes. jax is written in Python and tfjs in TypeScript.

# jax vs tfjs

jax and tfjs share 3 technologies: jaxlib, opt-einsum, and ml-dtypes. jax is written in Python and tfjs in TypeScript.

- [jax-ml/jax](https://seerepo.com/r/jax-ml/jax): Composable transformations of Python+NumPy programs: differentiate, vectorize, JIT to GPU/TPU, and more
- [tensorflow/tfjs](https://seerepo.com/r/tensorflow/tfjs): A WebGL accelerated JavaScript library for training and deploying ML models.

## What they share and what sets them apart

- In common: jaxlib, opt-einsum, ml-dtypes
- Only in jax: None
- Only in tfjs: tensorboard-data-server, h5py, werkzeug, React, @react-native-async-storage/async-storage, react-native, Preact, prompt-toolkit, Rich, Keras, optax, orbax-checkpoint, tensorflow-io-gcs-filesystem, TensorFlow, tf-keras, flax, jax, tensorflow-hub, markdown, markupsafe, progress, expo-gl, expo-camera, jpeg-js, glamor, vega-embed, d3-selection, vega-lite

## Side by side

| | jax | tfjs |
|---|---|---|
| Size | 656,473 lines written, 601 code files | 383,524 lines written, 2,527 code files |
| Who writes it | 0% of its commits signed by AI. With Gemini CLI | 0% of its commits signed by AI |
| Activity | Last push November 6, 2026, 30,226 commits, 36,582 stars | Last push June 23, 2026, 6,042 commits, 19,155 stars |
| Tests | 391 test files. 52.2% of its code files have a test that imports them | 72 test files. 1.9% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, jax or tfjs?

jax, with 656,473 lines written; tfjs has 383,524.

The proof: [jax-ml/jax's code at commit 88d646c](https://github.com/jax-ml/jax/tree/88d646c0b98b3f6e67d2e02264a7c859adb78184)

### Which has more GitHub stars, jax or tfjs?

jax, with 36,582 stars; tfjs has 19,155.

The proof: [jax-ml/jax on GitHub](https://github.com/jax-ml/jax)

### Which has more tests, jax or tfjs?

jax, with 391 test files; tfjs has 72.

The proof: [jax-ml/jax's code at commit 88d646c](https://github.com/jax-ml/jax/tree/88d646c0b98b3f6e67d2e02264a7c859adb78184)

### Which was updated more recently, jax or tfjs?

jax: its last push was on November 6, 2026, and tfjs's on June 23, 2026.

The proof: [jax-ml/jax's commits on GitHub](https://github.com/jax-ml/jax/commits)

## Sources

- jax-ml/jax: Read on November 6, 2026, at commit 88d646c (https://github.com/jax-ml/jax/tree/88d646c0b98b3f6e67d2e02264a7c859adb78184)
- tensorflow/tfjs: Read on November 6, 2026, at commit 7f5309f (https://github.com/tensorflow/tfjs/tree/7f5309fef0a47545e34049903dbdae0f97285f7e)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.