Free calculators, invoices and local PDF tools for everyday work
About BiznTools
BiznTools brings practical business calculators and document tools into one free website. Check pricing and margins, plan inventory, create invoices and quotes, calculate work hours and dates, or resize images and work with PDFs. Calculators include formulas and worked examples. Supported document and image processing runs locally in the browser, and no account is required.
✓ VerifiedSep 28, 2026
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