# Share a Weights & Biases Report — Without Buying the Reader a Seat

Canonical: https://commareports.com/share-wandb-report
Published: 2026-09-12

> W&B reports live behind a team login. Export the run history to a self-contained HTML chart and publish it to Comma so anyone with the link can read the curves and comment on them.

# Share a Weights & Biases report

W&B reports are the right internal artifact and the wrong external one. The
link asks for a login, the login asks for a seat in your team, and the person
you wanted to show the chart to is a client, a reviewer, or an advisor who
will never have one.

## Export the run history

```python
import plotly.graph_objects as go
import wandb

api = wandb.Api()
fig = go.Figure()

for run_id in ("abc123", "def456"):
    run = api.run(f"my-team/my-project/{run_id}")
    hist = run.history(keys=["_step", "val/loss"], pandas=True).dropna()
    fig.add_trace(go.Scatter(x=hist["_step"], y=hist["val/loss"],
                             mode="lines", name=run.name))

fig.update_layout(title="val/loss — baseline vs new schedule",
                  xaxis_title="step", yaxis_title="val/loss")
fig.write_html("wandb.html", include_plotlyjs="inline")
```

`include_plotlyjs="inline"` keeps the file
[self-contained](/glossary/self-contained-html) — a chart that fetches its own
library from a CDN is a chart that renders blank on a locked-down network.

Publish it:

```bash
curl -fsS -X PATCH "https://commareports.com/api/v1/reports/$REPORT_ID" \
  -H "Authorization: Bearer $COMMA_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d "$(jq -n --rawfile html wandb.html \
        --arg title "Schedule comparison — $(date +%F)" '{title: $title, html: $html}')"
```

## What the published copy adds

- **Anchored threads** — the question about the step-8k divergence sits on the
  chart. See [commenting on HTML](/comment-on-html).
- **Revisions** — one report id per experiment family; each publish is kept.
- **Access per report** — private, team-only, or domain-gated, decided per
  report rather than per workspace. See the [sharing model](/docs/sharing).

## Limits

- **Entry HTML: 5 MB.** Inlined plotly.js is roughly 3 MB; downsample long
  histories with `samples=` on `history()`.
- **Assets: 25 MB per file, 250 MB and 500 files per report.**
- **60 requests/minute per token.**

## Try it

Comma is free — unlimited reports, unlimited commenters, unlimited revision
history.

**[Publish a run report →](https://commareports.com/)**

### Related

- [Share a TensorBoard report](/share-tensorboard-report) · [Share an MLflow report](/share-mlflow-report)
- [Share a W&B Weave evaluation](/agents/share-weave-eval-report) · [Share an Optuna dashboard](/share-optuna-dashboard)
- [Share a Plotly HTML chart](/share-plotly-html) · [For data scientists](/for/data-scientists)