Free calculators and file tools for small businesses
Work out margins, VAT, discounts and loan payments, then handle the everyday file jobs — merging PDFs, turning photos into one document, compressing images for your website and building a QR code.
The 12 tools in this set
Profit Margin Calculator
Know your margin before you price.
VAT CalculatorAdd or extract VAT fast.
Discount CalculatorFinal price after the sale.
Percentage Change CalculatorWork out percent increase or decrease.
Compound Interest CalculatorSee how savings grow over time.
Loan / EMI CalculatorMonthly instalment, total interest and total cost.
QR Code GeneratorCreate scannable QR codes from text or URLs.
Image CompressorCompress JPG, PNG and WebP images in your browser.
Images to PDFTurn photos and scans into one PDF file.
Merge PDFCombine several PDF files into one document.
Watermark PDFAdd a text watermark to protect a document.
Image ResizerResize images by exact dimensions or percent.
A sensible order to work in
- Know your margin before you discount — A 20% discount on a 25% margin costs you most of the profit.
- Compress images before they go on the site — Page speed is both a ranking factor and a bounce-rate factor.
- Put the QR code on the printed thing — Menus, labels and receipts can all carry a tracked link.
Categories this set draws from
Small business tools — FAQ
Are the calculators accurate enough for real figures?
They use the standard formulas and are fine for planning. Confirm final numbers with your accountant.
Will my invoices or documents be stored?
No. PDF and image processing happens in your browser and nothing is retained.
Can I use the outputs commercially?
Yes — no watermark and no attribution needed.