Seller Tools — GST, Invoices, QR Codes & Utilities

GST calculator, invoice generator, QR codes, SKU generator and profit calculator for online sellers. Free, private.

📊Profit Margin CalculatorSee your true net profit per order — free.🧮GST CalculatorAdd or remove GST instantly — free.🧾GST Invoice GeneratorMake GST-ready invoices as PDF — free.📱QR Code GeneratorCreate scannable QR codes in seconds — free.🔖SKU ID GeneratorBuild clean, consistent SKU codes — free.🖼️Add Logo / Watermark to ImagesStamp your logo or watermark on photos — free.

Seller utilities are small calculators and generators for running an online business: a GST calculator with CGST and SGST split, a GST invoice generator that outputs a PDF, a QR code generator, a bulk SKU generator, and a profit margin estimator that accounts for marketplace fees.

They run in your browser and require no account. Figures are for guidance; confirm tax treatment with your accountant.

Frequently asked questions

Can I create a GST invoice for free?+

Yes. The invoice generator builds a GST invoice PDF with no signup and no watermark.

Does the GST calculator split CGST and SGST?+

Yes. It can add or remove GST and show the CGST and SGST split.

Is my business data stored?+

No. Everything is calculated in your browser.

Everything here runs in your browser — files are never uploaded. Browse all tools →