how to test the speed for a unpublished theme?

Topic summary

Testing page speed for an unpublished Shopify third‑party theme during a site rebrand.

  • Suggested tools: Google PageSpeed Insights and GTmetrix. Use the theme’s preview URL rather than the live site URL.
  • Issue raised: One user saw PageSpeed return results for the live theme, not the draft.

Proposed step-by-step method (with screenshots referenced):

  1. Open the unpublished theme in Preview.
  2. In the preview bar, copy the preview link (to the left of the three‑dot menu).
  3. Paste that exact preview URL into pagespeed.web.dev (or GTmetrix) to analyze.

Key point: The exact preview URL is required; testing the root domain will analyze the live theme, not the draft.

Status/outcome: A concrete method was provided, but no confirmation yet that it resolved the issue. The discussion appears open.

Notes: Screenshots are central to show where to copy the correct preview link from the preview bar.

Summarized with AI on December 11. AI used: gpt-5.

Hey,

Is there any way to have a speed test for the unpublished third party theme?

I’m rebranding of our website, but just want to make sure if it works for the page speed.

Thanks

Hello @Shawn512

Please use Google Pagespeed tool or GTmetrix tool to test the speed.

Use the preview URL of the unpublished theme and you will be able to see the speed.

Thanks

1 Like

Thanks!

Hello, I tried this solution but it didn’t work. The Google Pagespeed tool just regurgitated the stats for my current theme. Is there any way to get it to judge the speed of the draft theme?

Thanks,

D

Step 1: Preview Theme

Step 2: To the left of three dot in preview bar you can copy the link

step:3 Past it in pagespeed.web.dev