Free trial

Every install of Responsive Tester starts a seven-day Pro trial. No payment details are needed.

What is included

Try interaction sync, the breakpoint inspector, live CSS and class editing, saved CSS edits, change tracking, CSS export, and the MCP server alongside the free responsive preview tools.

Check your trial

Open Responsive Tester to see your trial status in the viewer. See Trial & licensing for activation and license details.

After the trial

The extension returns to its free features. Multi-device previews, scroll sync, device presets, site breakpoints, workspaces, resizing, zoom, overflow warnings, and screenshots remain available. There is no automatic charge.

Saved CSS edits stay on your device. After the trial, they stop restoring when you next open Responsive Tester, but remain saved for when you upgrade. An active session is not interrupted.

Keep Pro

Pro is a one-time purchase with a 30-day money-back guarantee. View Pricing or Learn how to activate a license.