DiffMate ‑ Asset Compare Tool

Develop by Shopify

Free plan available

Stop losing theme changes on publish by comparing first

Compare themes

Filter asset changes

Copy theme changes

Line-by-line comparison

Theme publish history

About DiffMate ‑ Asset Compare Tool

Launched Dec 05, 2023

Built by Shopify

Address

177 Wilshire Dr, #830, Troy, MI, 48084, US

Website Support Portal Privacy policy Tutorial FAQ Document

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Description

Compare different versions of your theme to easily view or update any changes before you publish.

DiffMate is a convenient way to see the asset differences between different versions of your theme. Filter to see only assets that have changed, all assets, or if they exists on one but not both. Our diff-editor allows you to copy specific changes (or entire files) from one theme to another. Whenever you deploy a new version of your store DiffMate reduces the stress of losing edits or forgetting template assets not copied over and much, much more.

See all your themes including hidden developer themes created by developer tools
Easily generate an overview of all the asset changes between themes
Compare assets line-by-line to see any differences using our diff-editor
Using the diff-editor you can copy files or specific changes between themes
See the history of when themes were published on you store

Pros

Helps prevent loss of theme changes during publish
Allows comparison of assets between different theme versions
Capability to filter and see only changed assets, all assets, or assets existing on one but not the other
Diff-editor enables copying specific changes or entire files between themes
Reduces the stress of forgetting template assets
Can see all themes including hidden developer themes
Generates an overview of all asset changes between themes
Line-by-line asset comparison using the diff-editor
See the history of when themes were published
Highly recommended by users
Simple to use with no need for extensive explanation

Top Helpful Reviews

Grove Sales Ltd

Jun 26, 2025 on Shopify

Excellent app that will save you loads of time, and its FREE so win win. Very easy to install and use A++++++

Papa & Barkley

Mar 25, 2025 on Shopify

Truly such a helpful and amazing tool! Makes theme updates a breeze and works perfectly. Kudos to the developers for releasing such an awesome tool for free.

My Store

Feb 12, 2025 on Shopify

Absolutely fantastic tool. Had been fiddling with various plugins and had been fiddling around with layout and css, meaning I broke the layout when I uninstalled them. After a couple of hours looking for the changes, I downloaded this tool, and found the culprit instantly!

Long Reef Surf Co

Feb 10, 2025 on Shopify

Game changer! This tool saves me so much time when upgrading themes. Shopify theme upgrades are a nightmare and this tool makes it so much easier and ensures I don't miss anything. Its very basic, but hey, its free... so no complaints. I particularly like the new feature that can create any additional missing codes files not contained in the original theme by just copying left to right. Freak'in awesome app thank you!!

Revendo

Jan 12, 2025 on Shopify

It's exactly what I've been looking for to track down the changes that were made in the theme code. This should be included as a standard feature as part of Shopify, IMHO. Thank you for providing this useful tool to us!

Monsterologist

Dec 17, 2024 on Shopify

This is a mind-bogglingly awesome tool for anyone who customizes their themes. The fact that Shopify codes their themes so that customizations break automatic upgrading is idiotic. They should use a parent/child system like WordPress. This app functions like any other diff tool, but it's built right into your Shopify admin like it was coded there by default (and should be). No need to download theme files and find differences, this tool does it all right in the Shopify admin, and will even open files in the Shopify online code editor if need be. Cannot thank the developers enough for this tool. Upgrading my theme was a major pain in the neck because of some slight theme edits. This tool has made that process immensely easier. Please add a tip jar to the app!

ASTRA Design Werx

Oct 02, 2024 on Shopify

Incredibly simple and easy to use. Clearly shows all code, what's changed, how's it changed, and where it's changed at. The perfect companion for checking your theme, especially if you have custom code and are doing a theme upgrade. Huge thanks to the developers!

Gatherings N Stuff

Sep 15, 2024 on Shopify

I am so excited to find this app, and it works well. Comparing build versions of my theme is fast and easy, it shows the results in a clear and easy-to-use way. My deployments will be easy and safe from now on. Awesome and thanks to the developers!!

DKNY

Jul 28, 2024 on Shopify

This app is essential for teams with multiple people working on a site, making changes in the theme customizer while we have developers working on code. It should really be OOB Shopify functionality.

Heirloom

Jul 18, 2024 on Shopify

Cannot recommend this app enough - its functionality should be built into Shopify. Works flawlessly, with zero fuss or explanation needed. An absolute must have when updating themes. Thank you so much for creating this!

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