Free tools · no sign-up
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.
Open toolBarcode Maker
Generate scannable Code 128, UPC, and EAN barcodes for SKUs and FNSKUs, then print them as thermal labels or Avery sheets.
Open toolDimensional Weight Calculator
See the billable weight USPS, UPS, and FedEx actually charge for, so quotes never catch you off guard.
Open toolUSPS Zone Map
Map the USPS shipping zone from your warehouse to anywhere in the country and plan rates accordingly.
Open toolBOL Generator
Build and download a freight Bill of Lading in seconds — freight class, NMFC, SCAC, and PRO fields included.
Open toolWho these free tools are for
Most people who land here run a growing ecommerce brand and handle shipping themselves — packing orders at the kitchen table, prepping FBA shipments between product launches, or quoting freight for the first time. You don’t need a logistics team or a paid software seat to get the numbers right. These tools cover the small, repetitive jobs that slow that work down: reformatting a label PDF so it prints clean, generating a barcode that scans, checking what a carrier will bill before you buy postage, and putting together a Bill of Lading without a template.
If you sell on Shopify, Amazon, or both, the workflow is the same. Open a tool, get your answer, and get back to running the store. Nothing here assumes you’re a Simpl customer, and nothing here tries to make you one. When the day-to-day shipping work outgrows doing it yourself, that’s when a 3PL like Simpl earns its keep.
Pick the right tool for the job
- Prepping inventory? Use the Label Resizer to get FBA and carrier labels print-ready, and the Barcode Maker to tag SKUs and FNSKUs.
- Pricing a shipment? The Dimensional Weight Calculator shows the billable weight carriers charge for, and the USPS Zone Map shows how far a package travels and what that does to the rate.
- Shipping freight? The BOL Generator builds a Bill of Lading with the freight class, NMFC, SCAC, and PRO fields a carrier expects.
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.
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.
- What's the difference between these tools?
- Each one solves a different shipping job. The Label Resizer and Barcode Maker get your inventory print-ready. The Dimensional Weight Calculator and USPS Zone Map help you predict shipping cost. The BOL Generator handles freight paperwork. Use whichever matches the task in front of you.
- Do these tools work on mobile?
- Yes. The tools run in any modern browser, so they work on a phone or tablet as well as a desktop. For the label resizer and barcode maker, a larger screen makes it easier to check your output before you print.
- Can I use these if I'm not a Simpl customer?
- Yes. The tools are open to anyone, customer or not. There's no account, no trial, and no upsell gating the result. Use them as often as you need.
- Which tool should I start with?
- Start with whatever's slowing you down today. Prepping an FBA shipment? The Label Resizer and Barcode Maker. Trying to work out shipping cost? The Dimensional Weight Calculator or USPS Zone Map. Booking freight? The BOL Generator.