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Free tools for ecommerce & Amazon sellers

Practical calculators and utilities for the parts of selling online that eat your time — labels, barcodes, freight, and shipping math. Every tool is free, runs in your browser, and never asks you to create an account.

Label Resizer

Turn messy FBA and UPS label PDFs into print-ready 4×6 and 2.25×1.25 labels — right in your browser.

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Barcode Maker

Generate scannable Code 128, UPC, and EAN barcodes for SKUs and FNSKUs, then print them as thermal labels or Avery sheets.

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Dimensional Weight Calculator

See the billable weight USPS, UPS, and FedEx actually charge for, so quotes never catch you off guard.

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USPS Zone Map

Map the USPS shipping zone from your warehouse to anywhere in the country and plan rates accordingly.

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BOL Generator

Build and download a freight Bill of Lading in seconds — freight class, NMFC, SCAC, and PRO fields included.

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Ready to hand it all off?

Let Simpl store, pack, and ship your ecommerce orders.

We run ecommerce fulfillment end to end — receiving, storage, pick-and-pack, and shipping, plus Amazon FBA prep when you need it — out of our Austin, TX warehouse, so the busywork stops being your problem.

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Free tools FAQs

Are these tools really free?
Yes. Every tool on this page is free to use with no Simpl account, no sign-up, and no watermark. Use them as often as you need.
Do I need to create an account or install anything?
No. The tools run in your browser — there's nothing to download or install, and no login. Open a tool and start using it.
Is my data private?
Yes. The label resizer, barcode maker, and calculators process your files and values directly in your browser, so your label PDFs, SKUs, and package data never get uploaded to Simpl or anyone else.
Can Simpl just do this work for me?
Yes. Simpl is a 3PL — we run ecommerce fulfillment and Amazon FBA prep from our Austin, TX warehouse, including receiving, storage, barcode labeling, pick-and-pack, and shipping. The tools help you in the meantime, and we can take the whole job off your plate when you're ready.