Practical Shopify tutorials and troubleshooting guides, free tools that check any store or website, and the extensions and experiments I build, written from real merchant problems at ParseLab LLC.
Find the theme, apps, platform, hosting and analytics of any website. Free, no sign-up.
The guides I would send a colleague first: step by step, and written from real merchant problems.
Shopify9 min readHow to keep your traffic when you move a store to Shopify: collect the old URLs, map each to its closest new page, build and check the redirect CSV, import it, test it and watch for 404s.
Read the guide →A simple, repeatable routine for finding the real cause of a Shopify issue before you change anything.
A practical rule of thumb for deciding whether a customization belongs in your theme or in a Shopify Function.
Pick a topic to see every guide filed under it.
Use them right now, no account needed. They read only the public pages of the site you enter.
Small tools and experiments made to solve real problems: what each one does, and where to get it.
Capture full pages, the visible screen, or a selected area. Crop, annotate, and export as PNG, JPG, WebP or PDF. Nothing ever leaves your device. See what it does and get it for your browser.
View DragShot →Habits that keep your Shopify theme customizations easy to maintain and easy to update.
Shopify→Three ways to find a Shopify store's theme and apps: a free detector, the browser console and the page source, how to read each field, and what no tool can see from the outside.
Shopify→Learn Shopify Liquid with practical examples of objects, tags, filters, variables and conditions used in real Shopify themes, plus the mistakes beginners make and the official docs to learn from.
Shopify→A step-by-step Shopify storefront audit checklist: 20 checks across theme settings, product pages, apps, the cart, browser tools and accessibility, plus a decision tree and a worksheet. Diagnose the source first, check configuration second, and write custom code only when the evidence supports it.
Shopify→Learn how to debug Shopify theme issues step by step, from Liquid and CSS to JavaScript, apps, and custom code, before changing your theme.
Shopify→Vulnerability write-ups and other technical analysis, kept apart from the Shopify guides.
I'm Md. Habibur Rahman, Lead, Technical Experience Engineer at ParseLab LLC in Dhaka, Bangladesh. I help Shopify merchants fix technical problems, and I write down what I learn so the next person does not have to start from zero.
I created this free knowledge hub to bring together the tutorials, explanations and tools I make. Every guide starts from a real problem: reproduce it first, find the cause, then fix it.
Started as an Associate and moved up to Lead. The work sits between merchants and the product and engineering teams: fixing store issues, customizing themes, and passing on what merchants keep running into.
Build custom Shopify work for merchants: theme customization and custom features.
Ran software projects and kept the team and the clients on the same page.
Built frontend features alongside senior engineers and finished a full-stack eCommerce app as my university capstone.
Write to me about a Shopify problem, a tool you would like to see, or a way we could work together.