FREE TOOLS
Free Direct Mail Tools
Plan your next campaign without spending a dollar. Each tool runs in the browser, no signup required, and they work whether or not you use PostKnock.
Direct Mail ROI Calculator
Plug in your list size, response rate, and average ticket value. The calculator estimates your gross return, payback rate, and break-even response rate so you can decide whether the campaign math works before you spend.
Open calculator →
Postcard Designer
A quick browser-based postcard mockup tool. Choose a size (4×6, 6×9, or 6×11), drop in a headline and an offer, and see what your design might look like before you commit.
Open designer →
Coming soon
EDDM Cost Estimator
Enter a ZIP code and piece type to see estimated EDDM postage costs and route options. See our EDDM overview →
QR Code Generator
Generate a trackable QR code for your postcard with built-in scan analytics. Learn how QR tracking works →
Mailing List Size Estimator
Estimate the size of your mailing list by ZIP code, radius, and business type — before you buy or build a list.
USPS Postage Calculator
Calculate USPS First-Class and Marketing Mail postage by postcard size, weight, and quantity.
Ready to send your first campaign?
PostKnock's Free plan lets you send postcards with no monthly fee and no minimum. Mail yourself a free sample, design in the visual editor, upload a CSV, and launch.
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