Free Seller Tools for Etsy, eBay, Amazon & Shopee

Why Use Free Seller Tools?

Running an online shop on Etsy, eBay, Amazon or Shopee means juggling dozens of decisions every day: what price to set, how to write titles that rank, which keywords to target, and when to reorder stock. Getting any of these wrong costs real money. Seller tools take the guesswork out of these decisions by giving you hard numbers and data-driven suggestions in seconds, so you can focus on creating great products instead of wrestling with spreadsheets.

Many sellers start out pricing their items by gut feeling, only to discover months later that marketplace fees have been eating into their margins all along. A fee calculator shows you the exact profit on every sale before you list it. Likewise, a title optimizer or tag generator helps you write listings that actually get found in search results, which directly translates to more views and more sales.

The tools on this page are built specifically for online sellers and run entirely in your browser. There is nothing to download, no account to create, and no data sent to any server. Whether you are a first-time seller listing your very first item or an experienced shop owner managing hundreds of products, these tools are designed to save you time and help you earn more from every sale.

Fee Calculators

Marketplace fees are one of the biggest hidden costs in online selling. Each platform charges a different combination of listing fees, transaction fees, payment processing fees and commission rates, and the totals can vary dramatically depending on your product category, price point and country. Our four dedicated fee calculators let you see exactly what you keep from every sale. The Etsy Fee Calculator covers listing fees, the 6.5% transaction fee, payment processing for 50+ countries, and optional offsite ads. It also includes a reverse calculator so you can set a target profit and find out what price to charge.

The eBay Fee Calculator handles insertion fees, final value fees by category, and promoted listing costs. The Amazon Fee Calculator breaks down referral fees, FBA fulfillment costs, storage fees and closing fees for every major product category. The Shopee Fee Calculator covers commission rates, service fees and transaction fees across multiple Southeast Asian markets. If you sell on more than one platform, the Marketplace Fee Comparison tool lets you enter a single product and compare your net profit across all four marketplaces side by side, so you always know where you will earn the most.

Listing Optimization Tools

Getting your products in front of buyers starts with well-optimized listings. Search algorithms on every marketplace rely heavily on your title, tags, keywords and description to decide which products to show. Our listing optimization tools help you write better listings without the trial-and-error approach. The Etsy Tag Generator creates optimized 13-tag sets based on your product details, respecting Etsy's character limits and avoiding wasted duplicate terms. The Listing Title Optimizer scores your titles for Etsy, eBay and Amazon and gives specific suggestions for improvement.

For product descriptions, the Etsy Description Builder provides structured templates that cover all the key sections buyers look for, from product details to shipping information. The eBay Title Builder helps you maximize the 80-character limit on eBay titles, while the Amazon Backend Keyword Tool lets you optimize your hidden search terms within Amazon's 250-byte limit. The Listing SEO Scorer audits any listing and gives you an overall quality score with actionable fixes, and the Keyword Density Checker analyzes how often your target keywords appear in your listing text so you can avoid both under-optimization and keyword stuffing.

Business Planning Tools

Growing a shop from a side project into a real business takes more than great products. You need to understand your numbers. Our business planning tools help you make smarter decisions about pricing, spending and inventory. The Break-Even Calculator tells you exactly how many units you need to sell to cover your fixed and variable costs, so you know when a new product line will start generating profit. The ROI Calculator helps you evaluate whether that advertising campaign, equipment purchase or bulk material order is actually worth the investment.

On the inventory side, the Inventory Reorder Calculator uses your sales velocity, lead time and desired safety stock to calculate the ideal reorder point and economic order quantity. This prevents both stockouts that cost you sales and overordering that ties up your cash. The SKU Generator creates consistent, organized product codes that make inventory tracking straightforward as your catalog grows. Together, these tools give you the financial clarity to run your shop like a business rather than guessing your way through it.