Chart Playground

Edit the YAML and the chart redraws as you type. Pick a starting point from the list, or paste a chart from your own dashboard.

You don't need to know the YAML to start:

• Quick settings above the editor change the most common options for you.
• Type in the editor and it suggests the options that fit where your cursor is, with a short description. Press Ctrl+Space to see suggestions anywhere, and hover over a key to read what it does.
• Options here (under the editor) lists everything you can add at the cursor. Insert adds it at the right indent, and Docs opens its section in a new tab.

How the preview works

The preview uses the chart card's own code: the same option handling, grouping, time window, theme colours and validation as on your dashboard. The docs site has no Home Assistant, so:

• Entities get generated sample data. Names containing temperature, humidity, power, energy or battery get a realistic signal, and light.*/switch.*/binary_sensor.* entities switch on and off. Any other entity gets a generic wave.
• Long-term statistics are computed from the same sample signal.
• Data source series plot their entity's sample signal. Processors (smoothing, rates, ...) only run on a real dashboard.
• theme: tokens resolve on a real dashboard; the preview shows their fallback colours.

Messages under the chart show schema warnings, and explain how an older format would be converted.

When it looks right, Copy YAML and paste it into your card's YAML editor, then swap in your own entities.