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ThemeMerge
- by LazyDay Labs
- Free plan available
- by LazyDay Labs
- Free plan available
Merge live theme edits into your working copy before publishing. Keep changes from both versions without losing updates.
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About the ThemeMerge
ThemeMerge helps you merge edits from your live theme into the working copy you're developing. When you build a redesign on a theme copy, changes made to the live theme are usually lost when you publish. This app compares both themes against a baseline recorded when the copy was made, tracking what each side changed. The theme editor JSON merges key by key, keeping sections added on either side. Liquid, CSS and JavaScript files merge line by line. You review and resolve any remaining conflicts, then download the merged theme to preview before publishing. Your live theme is never modified during the process, keeping your store safe while you work.
Launched: November 11, 2026
Key features
- Three-way compare of live theme and working copy against a recorded baseline
- Theme editor JSON merged key by key, so sections added on both sides are kept
- Section and block order merged so both sides' additions stay in place
- Resolve conflicts one at a time, per file, or by editing the result directly
- Reads your live theme only and never writes to it
Integrations with:
- Shopify Admin
Category:
Pricing of ThemeMerge
Free plan
Free
ThemeMerge PRO
$15 / month
