Etsy, Amazon & Shopify fee calculators, profit margin tools, and policy generators, 13 free tools built for online sellers. Free to start.
From pricing a product to writing your policies, grouped by what you're trying to do.
Simple, on purpose: use it free with a few limits, or subscribe once and unlock Pro on every obscuraos.com product. Cancel anytime.
Payments are processed securely by Stripe, Sellerline never sees or stores your card details. Once you pay, this browser is unlocked immediately and stays unlocked, no account or login needed. See the full free vs. Pro comparison across all 5 products →
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No jargon, no sales pitch, just what you actually need to know.
Yes. All 13 Sellerline tools work for free with unlimited use, no account required. Pro removes ads and unlocks perks on the other four products too, for one $9/mo subscription.
No. Every fee calculation and policy you generate stays in your browser. Sellerline never sees your Etsy, Amazon, or Shopify numbers, and nothing is stored on a server.
The calculators use each platform's published fee structure as of the last update. Marketplace fees do change occasionally, so always cross-check against the platform's current fee schedule for a final pricing decision.
Yes. The profit margin, break-even, and shipping calculators work for any storefront, and the guides cover Etsy, Amazon FBA, and Shopify specifically, including a head-to-head comparison of all three.