Building an Open-Source Polotno Alternative (Canva-like Editor)

#design #opensource #showdev #webdev

In the past few weeks, I built an open-source design editor that works similarly to Polotno — and decided to open-source it as OpenPolotno.

The goal was simple: create a Canva-like editor that developers can fully control, customize, and self-host.

🚀 Why I Built This

Polotno is a great tool, especially for quickly building design editors.

But while working with it, I felt a few limitations:

Limited control over customization
Dependency on a proprietary ecosystem
Constraints when scaling or extending features

I wanted something that:

Gives full ownership of the editor
Allows deep customization
Can be self-hosted without restrictions

So I decided to build an alternative — compatible with Polotno, but fully open.

🧠 The Idea

Instead of reinventing everything, I focused on:

👉 Compatibility

If developers are already using Polotno, they shouldn’t need to rewrite everything.

So OpenPolotno supports:

Similar API structure
Template compatibility
Familiar data format

This makes migration or integration much easier.

✨ Features

Here’s what the editor currently supports:

🎨 Drag-and-drop canvas editor
🖼️ Text, images, and layer management
🧩 Polotno-compatible templates
🔌 Similar API structure
💾 JSON-based import/export
⚡ Fast and lightweight performance
🔓 Fully open-source
🧱 Challenges I Faced

Building a design editor is not trivial. Some of the biggest challenges were: