Free tools for online stores
Useful tools for the work behind your store.
Calculate margins, prepare Shopify images, generate product SKUs, build trackable campaign links, and find practical guides. Free, with no account required.
No signup. Start with the task you need to finish today.
Free merchant tools
Pick a task and get it done.
Every tool works without an account, and your inputs stay in your browser.
Pricing
Profit margin calculator
See what remains from each sale after product costs, shipping, and selling fees.
Calculate your margin →Images
Shopify image resizer
Check image limits and batch resize product photos for Shopify and social channels.
Prepare product images →Inventory
Bulk SKU generator
Create consistent SKU codes for every product variant and download a CSV.
Generate product SKUs →Campaigns
Campaign URL builder
Create consistent tracking links for email, social, influencer, and paid campaigns.
Build a campaign link →Merchant guides
Need a process, not a calculator?
Browse practical templates and step-by-step guides for promoting your Shopify store.
Lantern Ferry for Shopify
Create social content from your Shopify catalog.
Choose products from your store and create images and captions without copying product details by hand.
- 01Choose products and collections directly from Shopify.
- 02Create social images, captions, calls to action, and hashtags.
- 03Keep your brand preferences and previous work together.
Why the name?
Every lantern solves one job.
Lantern Ferry keeps bringing more useful tools aboard as new merchant needs become clear.
Start here
What does your store need today?
Choose a free tool and finish one task now.