Guides
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Common Barcode Types Explained
A practical introduction to Code 128, Code 39, EAN-13, EAN-8 and UPC and the kinds of jobs they are commonly used for.
Read the guide →Useful answers, not just buttons
Our guides explain the ideas behind the tools in plain language, with examples you can actually follow. Use them when you want to understand the answer rather than simply get one.
How we approach these guides: they are written to help with the actual task in front of you. We use examples, point out common mistakes and explain where a simple calculator has limits. If you spot an error or something that needs clarification, please let us know through the Contact page.
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Calculations
Percentages, age, pricing and break-even planning.
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Digital tools
QR codes, barcodes, Base64 and file transfers.
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Everyday business
Invoices, margins, pricing and practical workflows.
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Guides
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QR Code vs Barcode: What Is the Difference?
A practical comparison of traditional one-dimensional barcodes and two-dimensional QR codes, including when to use each.
Read the guide →