Setting the License

To remove the watermark displayed on the apextree chart, you will need to purchase the license and set it like below

import ApexTree from 'apextree';

// set license key before creating any charts
ApexTree.setLicense('your-license-key');

const tree = new ApexTree(document.getElementById('svg-tree'), options);
const graph = tree.render(data);

You will receive your license key via email after purchasing a plan.

One key covers the family

A license key was never product-specific, but until recently each library kept its own private copy of the license manager, so setting a key on one did not license another sitting beside it on the same page.

They now share one slot, so any product's setLicense licenses all of them:

import ApexCharts from 'apexcharts'

// licenses the charts, trees, gantt charts and sankey diagrams on this page
ApexCharts.setLicense('your-license-key')

ApexTree.setLicense does the same thing. Call whichever is convenient, once, before your first instance is constructed.

There is also a downgrade guard: once a valid key is registered, a later call with an invalid or expired one cannot replace it.

Signature-verified keys

Keys issued from 27 July 2026 onward carry an ECDSA P-256 signature over a canonical payload, checked in the browser against a public key baked into the bundle.

The practical effect: a key whose payload has been edited (plan upgraded, expiry pushed out, domain list widened) no longer validates, and the tree renders watermarked. An unmodified key from your purchase email is unaffected.

Keys issued before that date are unsigned and keep working unchanged until 31 July 2027, with no console warning in the meantime. If your key predates July 2026, request a reissued one before that date.