Simple, fast, and free. Calculate GST, verify ABN, create invoices. No signup required.
Professional Australian tax invoices
Professional business quotes
Verify business numbers & GST status
Calculate property stamp duty for NSW, VIC & QLD (2025-26 rates)
Add or remove 10% GST instantly
Calculate margins, markup & gross profit
Calculate return on investment
Calculate take-home pay (2025-26 rates)
Calculate Centrelink JobSeeker payment
First home super saver scheme benefits
Calculate redundancy pay & Centrelink wait
Calculate break-even point for your business
Merge 2 or more PDF files into one
Lessen the file size of a PDF file
Extract pages from your PDF
Rotate PDF pages as needed
Convert PDF files to editable Word documents
Convert PDF tables to Excel spreadsheets
Convert images to PDF documents
Convert Markdown to Word documents
Convert images to WebP format for faster loading
AI-powered background removal from images
No waiting, no loading. All calculations happen instantly in your browser.
ATO-compliant calculations, ABN verification, GST-ready invoices.
Core features are 100% free. No hidden costs, no credit card required.
Yes! All our core business tools are completely free to use. No signup required, no credit card needed. We offer premium features for advanced users, but the essential tools will always be free.
No. All tools work instantly without any registration. Just open the tool and start using it. If you want to save your work or access premium features, you can optionally create a free account.
Yes. Our GST calculations follow ATO guidelines, invoices include all required elements (ABN, GST), and our ABN lookup uses official Australian Business Register data. However, always consult with a qualified accountant for tax advice.
Absolutely! All our tools are fully responsive and work perfectly on mobile phones, tablets, and desktop computers. Use them anywhere, anytime.
We focus exclusively on Australian businesses. Every tool is built with Australian tax laws, ABN requirements, and GST compliance in mind. Plus, our tools are designed to be simple and fast - no complicated setups or learning curves.
Our ABN Lookup tool sources data directly from the Australian Business Register (ABR), the official government database. The information is as accurate and up-to-date as the ABR itself.
Join 10,000+ Australian businesses using OzSparkHub tools every month