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Postiz has a built-in design editor, powered by the Polotno SDK, that lets people create and edit visuals inside the composer. It needs a Polotno key, which you supply.
What the editor does from a user’s point of view is covered in Images and video. This page is only the setup.

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Setup

1

Create a Polotno account

Sign up at polotno.com and open the API dashboard to generate an API key.
2

Add the API key to Postiz

Set NEXT_PUBLIC_POLOTNO in your environment to the key from the Polotno dashboard:
In docker-compose.yaml:
3

Restart Postiz

NEXT_PUBLIC_POLOTNO is read by the frontend at build time, so you need to rebuild the frontend image (or restart the dev server) for the change to take effect.
Exact steps may vary slightly depending on your deployment. See Docker Compose or Development for environment-specific notes. If the variable is unset, the editor falls back to a demo/anonymous mode that is not suitable for production.

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Licensing

Polotno is a commercial SDK and requires a valid license for production use.
  • Licenses are purchased and managed directly through Polotno.
  • Postiz does not bundle, resell, or proxy Polotno licenses.
  • Billing, licensing, and usage terms are handled by Polotno.
Postiz users can use the coupon code postizfriends at checkout to receive $100 off a Polotno license.

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Reference