diff --git a/README.md b/README.md
index 0652c6e..ddcf97f 100644
--- a/README.md
+++ b/README.md
@@ -8,14 +8,14 @@
 Make every matrix beautiful.
 
 MatRepr formats matrices and tensors to HTML, string, and LaTeX, with Jupyter integration.
-See [Jupyter notebook for examples.](doc/demo.ipynb)
+See [Jupyter notebook for examples.](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo.ipynb)
 
 * **SciPy** - sparse matrices and arrays like `csr_matrix` and `coo_array`
-* **NumPy** - `ndarray` [(demo)](doc/demo-numpy.ipynb)
-* **[PyTorch](https://pytorch.org/docs/stable/sparse.html)** - dense and sparse `torch.Tensor` [(demo)](doc/demo-pytorch.ipynb)
-* **[TensorFlow](https://www.tensorflow.org/guide/sparse_tensor)** - `tf.Tensor` and `tf.SparseTensor` [(demo)](doc/demo-tensorflow.ipynb)
-* **[Python-graphblas](https://github.com/python-graphblas/python-graphblas)** - `gb.Matrix` and `gb.Vector` [(demo)](doc/demo-python-graphblas.ipynb)
-* **[PyData/Sparse](https://sparse.pydata.org/)** - `COO`, `DOK`, `GCXS` [(demo)](doc/demo-pydata-sparse.ipynb)
+* **NumPy** - `ndarray` [(demo)](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-numpy.ipynb)
+* **[PyTorch](https://pytorch.org/docs/stable/sparse.html)** - dense and sparse `torch.Tensor` [(demo)](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-pytorch.ipynb)
+* **[TensorFlow](https://www.tensorflow.org/guide/sparse_tensor)** - `tf.Tensor` and `tf.SparseTensor` [(demo)](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-tensorflow.ipynb)
+* **[Python-graphblas](https://github.com/python-graphblas/python-graphblas)** - `gb.Matrix` and `gb.Vector` [(demo)](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-python-graphblas.ipynb)
+* **[PyData/Sparse](https://sparse.pydata.org/)** - `COO`, `DOK`, `GCXS` [(demo)](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-pydata-sparse.ipynb)
 * `list`, `tuple`, including multi-dimensional and ragged
 
 Features:
@@ -176,7 +176,7 @@ MatRepr gracefully handles:
  * string values (including multiline)
  * LaTeX scientific notation as $`\times 10^{power}`$
 
-See [demo-edgecases notebook](doc/demo-edgecases.ipynb) for more.
+See [demo-edgecases notebook](https://nbviewer.org/github/alugowski/matrepr/blob/main/doc/demo-edgecases.ipynb) for more.
 
 ## How does it work?