Free business tools: PDF, invoices, QR codes and calculators
Small tools that each do one job, all running inside your browser so your files never reach a server. No account and no watermark.
- Free, no account
- Runs in your browser
- Arabic and English
PDF tools
Merge PDF files
Pick your files, put them in order and download one PDF. Images are added as pages too.
Split a PDF
Type the pages you want, like 1-3, 5, or split into one file per page.
Compress a PDF
Choose a level and see the size before and after. If it cannot get smaller, you keep the original.
Image to PDF
Pick your photos, put them in order and get one PDF. Handy for receipts, ID copies and scanned papers.
PDF to images
Choose resolution and format, then download the pages as images or all in one ZIP.
Images and codes
QR code generator
Static codes that point straight at your link: no middleman redirect and no expiry.
Barcode generator
Type the number and we add the check digit. Or paste a whole list and get every barcode.
Image resizer and compressor
Get product, Instagram and website photos to the right size, many at a time.
Invoices and receipts
Business calculators
VAT calculator
Pick the country or type your own rate. Price before or after VAT, with the result in the currency’s own precision.
End-of-service calculator
Enter the start date, end date and pay. We show every step and the rule it comes from. An estimate, not legal advice.
Salary and overtime calculator
Enter the monthly pay and the overtime hours. We work out the hourly rate and what is due.
Profit margin and markup calculator
Enter cost and price or the margin you want. We show the difference between margin and markup.
Why are they free?
STAK is business software for the Gulf and any one app is free forever. These tools are a small gift to any business owner. If you like them and want your invoices, customers and stock in one place you can sign up free, and if not, just use the tools with no strings.
Your whole business, one stack
Invoices, till, stock, team and bookings in one place. Any one app is free forever.
- No card needed
- Free forever
- Try one more app free for 30 days