Photopea True Fullscreen

Makes Photopea use the full browser width instead of leaving a large reserved area on the right side of the editor.

Built around a simple viewport-width spoof, with some extra handling to keep it reliable on Edge and other Chromium-based browsers.

There is little reason to surrender perfectly good screen space to nothing.

Features

• Full-width Photopea workspace
• Removes the reserved right-side space
• Tested on Microsoft Edge and Brave
• Restores the layout after tab switching, refocusing, and resizing
• Keeps the width spoof active during long sessions
• Suppresses Photopea's specific "Something is changing our source code" warning when triggered by the script
• No themes or UI recoloring
• No external libraries

Install

This OpenUserJS page can install the script directly.

You can also get it from:

• GitHub
• Greasy Fork

Browser Support

Tested with:

• Microsoft Edge
• Brave

It should also work with other modern browsers using Tampermonkey, Violentmonkey, or another compatible userscript manager.

Source

The main source and changelog are maintained on GitHub:

ghostlybliss/Photopea-Fullscreen-2026

Disclaimer

This is an independent, unofficial userscript and is not affiliated with or endorsed by Photopea.

Photopea and its branding belong to their respective owner.