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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Design Studio
Design your postcard from real templates, then mail yourself a free printed sample. No signup.
Open Design Studio →
Postcard From Your Website
Enter your website and business name. We read your homepage, pull your logo and a brand color, and show a finished front and back in about 10 seconds. Mail yourself one free, or sign up to edit it.
Make my postcard →
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
Type your ZIP codes and see how many homes are in them (2020 Census), plus what it costs to buy that mailing list and mail every home a postcard on the Free and Pro plans.
Open estimator →
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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