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.
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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.
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EDDM Cost Estimator
Estimate Every Door Direct Mail postage, printing, and total cost per piece. Size your drop by mailpieces or by carrier routes, and see the math before you budget.
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QR Code Generator
Turn any URL or text into a scannable QR code. Customize size and color, then download a print-ready PNG or vector SVG. Free, in-browser, no signup.
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Mailing List Size Estimator
Estimate how many households you can reach by radius or EDDM carrier routes, then get a suggested number of mailers and a budget range at PostKnock per-piece pricing.
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USPS Postcard Postage Calculator
Estimate per-piece USPS postage and total mailing cost by mail class, postcard size, and quantity. See the postage math before you budget your drop.
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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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