Generate Heatmap Online
Turn a matrix, a long table, or a correlation into a colour-graded heatmap. Use Heatmap Generator in your browser with no signup, no daily limit, and no backend processing for tool input.
Problem
You need a quick generated output for testing, documentation, examples, or setup work.
What to do
Generated output is best for demos, fixtures, placeholders, and setup tasks. Review the generated result before using it in production code or documents.
- 1Open Heatmap Generator and set the required options.
- 2Generate the output and inspect it.
- 3Copy or download the generated result.
Use the browser tool
Heatmap Generator is a free, browser-based tool that helps you produce ready-to-use output in seconds. Turn a matrix, a long table, or a correlation into a colour-graded heatmap. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.
People also ask
- How do I use Heatmap Generator?
- Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Turn a matrix, a long table, or a correlation into a colour-graded heatmap.
- Is my data uploaded or stored anywhere?
- No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.
- Is Heatmap Generator free?
- Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.