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Free Tools for E-Commerce Sellers 2026: Pricing, Tax & Books
E-commerce margins live and die on pricing, tax, and bookkeeping — and the tool subscriptions eat into both. These free tools for e-commerce sellers cover the daily grind with no signup and no budget: pricing math, sales tax, bank CSV, and product image tools in your browser.
The seller stack
| Task | Free tool | Why it wins |
|---|---|---|
| Pricing & promos | Discount Calculator | Set sale prices and verify margins |
| Margins | Percentage Calculator | Markup, margin, and change math |
| Sales tax | Sales Tax Calculator | Add/remove tax at any rate, any state |
| Bank statements | BankToCSV | Statement PDF → CSV for books and taxes |
| Product images | Image Compressor | Fast-loading listing photos |
| Image formats | Image to WebP | Web-optimized product shots |
| QR codes | QR Generator | Packaging and product links |
| Invoice buyers | InvoiceForge | B2B invoices, free tier |
Why browser-based seller tools
- No per-seat fees — the whole store uses them free
- Private — sales and financials stay in your browser
- Instant — no installs, no learning curve
- Import-ready — CSV output works with your books
Seller tips
- Price with the Discount Calculator before every sale event
- Verify sales tax on every order with the Sales Tax Calculator
- Convert statements monthly with BankToCSV — tax season becomes painless
- Compress product images before listing — faster pages, better conversion
Build your seller toolkit — no signup
Start with Discount Calculator
Start with Discount Calculator
Frequently Asked Questions
Are these e-commerce tools really free? Yes — the free tiers cover daily use with no watermark.
Is my data uploaded? No — everything runs in your browser, so sales data stays on your device.
Does the CSV work with my accounting? Yes — BankToCSV output imports into QuickBooks, Xero, and spreadsheets.
What about paid upgrades? Pro plans start at €10/mo with lifetime deals and crypto payments.