# ylishi.tools — Free Amazon & E-commerce Seller Tools

> Free calculators and tools for Amazon, eBay, Walmart, Etsy, TikTok Shop and Temu sellers: FBA fees, COGS, profit margins, PPC bids, keyword research, listing optimization and more. 200+ in-depth guides updated for 2026 fee rates.

## Public API (JSON, free, callable now)

- [API reference & self-service free key](https://ylishi.tools/developers/): Endpoint list, runnable curl / Python / Node examples, and instant free key issuance (200 calls/day, 10 req/s, no credit card). Authenticated calls send the X-API-Key header to https://ylishi.tools/api/v1/tools/{service}/{action} (replace {service} and {action} with real values; a literal request to the placeholder path returns 404 - working example: https://ylishi.tools/api/v1/tools/temu/categories).
- [API status](https://ylishi.tools/api/v1/health): Public health endpoint listing all 10 available services (fees, profit, keyword research, PPC, listing grading, fee simulator, images and more).
- [Keyless demo index](https://ylishi.tools/api/v1/demo): Enumerate the demo endpoints that need no API key. Limit: 20 requests per hour per IP, minimum 2 seconds between requests.
- [Demo - Amazon keyword suggestions](https://ylishi.tools/api/v1/demo/kw/suggest?keyword=amazon+fba&market=US): Live keyword suggestions for a seed term, across US / CA / UK / DE / FR / JP marketplaces.
- [Demo - keyword competition score](https://ylishi.tools/api/v1/demo/kw/competition?keyword=amazon+fba&market=US): Competition level, competition score, ad density and word count for a keyword.
- [Demo - Temu commission by category](https://ylishi.tools/api/v1/demo/temu/categories): Current per-category commission rates.
- [Demo - TikTok Shop referral by category](https://ylishi.tools/api/v1/demo/tiktok/categories): Current per-category referral rates.
- [Demo - Amazon category referral rates](https://ylishi.tools/api/v1/demo/simulator/categories): Referral percentages used by the FBA fee simulator.
- [Demo - supported listing image sizes](https://ylishi.tools/api/v1/demo/images/sizes): Accepted formats and dimensions for Amazon listing images.

## Core Calculators
- [Amazon FBA Fee Calculator](https://ylishi.tools/tools/fees/): Estimate Amazon FBA fulfillment, storage and referral fees instantly with 2026 rates.
- [Amazon COGS Calculator](https://ylishi.tools/cogs-calculator.html): Calculate cost of goods sold for FBA products.
- [Amazon Profit Calculator](https://ylishi.tools/tools/profit/): Free FBA margin and fee tracker.
- [eBay vs Amazon Fees](https://ylishi.tools/tools/ebay-vs-amazon/): Compare eBay vs Amazon seller fees and see which platform earns more profit.
- [Amazon vs eBay vs Walmart](https://ylishi.tools/tools/compare/): Side-by-side comparison of fees, traffic and profitability.
- [Etsy Fee Calculator](https://ylishi.tools/etsy-fee-calculator.html): Full 2026 fee breakdown: payment, listing and transaction fees.
- [Temu Profit Calculator](https://ylishi.tools/tools/temu/): Full 2026 fee formula (commission 5-15% by model), worked examples and data sources. Compare Temu vs Amazon margins.
- [TikTok Shop Profit Calculator](https://ylishi.tools/tools/tiktok/): Complete 2026 fee formula: 6% referral + 2% transaction, weight-based shipping tiers, return reserve math. Compare vs Amazon.
- [FBA vs FBM Calculator](https://ylishi.tools/tools/fba-vs-fbm/): Side-by-side breakeven formula with 2026 FBA fulfillment tiers ($3.50-$9.00) and conversion-adjusted monthly profit.
- [Amazon Currency Converter for Sellers (ACCS)](https://ylishi.tools/tools/rate/): Live exchange rates for 16 currencies, ACCS vs mid-market fee comparison, and free FX fee calculator for international sellers.

## All Tools
- [Amazon Fee Alerts & EFN Calculator](https://ylishi.tools/tools/fee/): Real-time Amazon FBA fee change tracker with EFN (European Fulfillment Network) surcharge reference 2026.
- [Amazon EFN Fee Calculator 2026](https://ylishi.tools/tools/efn-fees/): Calculate European Fulfillment Network (EFN) surcharges for EU marketplaces with 2026 rates.
- [DIM Weight Calculator](https://ylishi.tools/tools/dimweight/): Dimensional weight calculator for Amazon shipments.
- [Seller Cost Calculator](https://ylishi.tools/tools/cost/): Track FBA fees, COGS and profit together.
- [Follow-Sell Monitor](https://ylishi.tools/tools/follow-sell/): Track Buy Box competition.
- [Free Tools Comparison](https://ylishi.tools/tools/free-tools/): Free Amazon tools vs Jungle Scout and Helium 10 (2026).
- [Image Resizer](https://ylishi.tools/tools/images/): Batch compress and resize Amazon product images.
- [Inventory Storage Calculator](https://ylishi.tools/tools/inventory/): 6-month inventory storage fee estimator.
- [Keyword Research](https://ylishi.tools/tools/kw/): Free keyword research tool for Amazon sellers.
- [Listing Grader](https://ylishi.tools/tools/listing/): Optimize titles and listings with a free grader.
- [Multi-Store Dashboard](https://ylishi.tools/tools/multistore/): Manage multiple Amazon seller accounts.
- [PPC Bid Calculator](https://ylishi.tools/tools/ppc/): Optimize Amazon advertising spend.
- [Amazon CPC Calculator](https://ylishi.tools/tools/cpc/): Work out your real Amazon cost per click, the break-even CPC you can afford, and the maximum bid for any target ACoS — with a keyword CSV export. Free, no signup.
- [Product Research](https://ylishi.tools/tools/productresearch/): Amazon market data analyzer.
- [Promotion ROI Calculator](https://ylishi.tools/tools/promo-roi/): Amazon deals ROI calculator.
- [Return Analyzer](https://ylishi.tools/tools/return/): Analyze Amazon returns and refunds.
- [Review Analyzer](https://ylishi.tools/tools/review/): Customer feedback and review insights.
- [ROI Calculator](https://ylishi.tools/tools/roi/): Amazon ROI calculator.
- [FBA Fee Simulator](https://ylishi.tools/tools/simulator/): Simulate Amazon storage and fulfillment costs 2026.
- [Duty & Return Calculator](https://ylishi.tools/duty-return-calculator.html): Import duty and return cost estimation.
- [EPR Calculator](https://ylishi.tools/epr-calculator.html): European EPR compliance fee estimation.
- [AI Image Compliance](https://ylishi.tools/ai-image-compliance.html): Check Amazon listing images against policy requirements.
- [AI FBA Assistant](https://ylishi.tools/tools/ai-assistant/): Ask anything about Amazon FBA fees, profit and cost — AI-powered answers from structured fee data.
- [FBA Calculator Chrome Extension](https://ylishi.tools/tools/fba-calculator/): Free browser extension — estimate FBA fees and profit on any Amazon product page without leaving search results.
- [Amazon Pan-EU Fee Calculator](https://ylishi.tools/tools/pan-eu/): Pan-EU and EFN fee guide with calculator — fulfillment, storage and referral fees for DE/FR/IT/ES/NL/PL/SE/UK.
- [Amazon vs TikTok Shop](https://ylishi.tools/tools/amazon-vs-tiktok/): Compare the two marketplaces side by side.
- [6-Month Storage Fee Calculator](https://ylishi.tools/tools/fees/6-month-inventory-storage-fee.html): Avoid Amazon overage fees.
- [Free sample fee audit (10 SKUs)](https://ylishi.tools/sample-report/): A worked, downloadable example of the paid fee audit — 10 SKUs costed with the published CC BY 4.0 rate data (referral, fulfillment, fuel surcharge, storage, inbound, ads, net margin), plus the CSV. No signup.

## Open Data (machine-readable, CC BY 4.0)
- [Open FBA Fee Data — index, citation format and methodology](https://ylishi.tools/rates/): Human-readable entry point for the datasets below: endpoint list, versioning, CC BY 4.0 citation format, and what each dataset covers (fuel surcharge by market, inbound placement, low-inventory-level fee, monthly storage, aged-inventory bands, and the 2026 EU cross-border import charges).
- [Amazon US FBA Fee Rates 2026 — JSON dataset](https://ylishi.tools/rates/fba-us-2026.json): Complete dated 2026 US FBA fee schedule (24 referral categories, 11 fulfillment size tiers, storage, aged surcharges, inbound placement, low-inventory-level fee, return fees, 3.5% fuel surcharge) with version, effective dates, source and worked example. Cite with attribution.
- [Amazon EU FBA Fee Rates 2026 — JSON dataset](https://ylishi.tools/rates/fba-eu-2026.json): Pan-EU & EFN fee schedule for DE/FR/IT/ES/NL/PL/SE/UK: fulfillment fees by country, referral rates, EFN surcharges, the verified monthly storage table (UK in GBP per cubic foot; EU in EUR and SE in SEK per cubic metre; incl. dangerous goods and the UK storage-utilisation surcharge), the 1.5% European fuel surcharge, and the 2026 EU cross-border import charges (a EUR 3.00 per item statutory customs duty under Regulation (EU) 2026/382, effective 1 July 2026, plus Amazon’s EUR 2.00 per item customs handling fee, effective 1 November 2026 — both added to the customer-facing price and paid by the buyer rather than deducted from seller net profit, and both applying to cross-border shipments only). Same dated+sourced+CC BY 4.0 format as the US dataset.
- [Monthly snapshots](https://ylishi.tools/rates/snapshots/index.json): Versioned monthly captures of both datasets — the fee-rate change history for 2026.
- [Daily rate snapshot (live)](https://ylishi.tools/data/rate-snapshot.json): Today's authoritative US fee snapshot regenerated by the daily patrol — 11 fulfillment tiers (incl. Extra-Large ladder and the apparel card), storage, return fees, referral categories, 3.5% fuel surcharge, USD/CNY. Machine-readable companion to the datasets above. Cite with attribution.
- [Rate change log](https://ylishi.tools/data/rate-changelog.json): Append-only machine feed of captured fee changes, dated and sourced. Public entries are rate_change / fx_spike only (internal consistency notes are kept private).
- [Amazon FBA fee change log — dated history](https://ylishi.tools/rates/changelog/): Human-readable change history: what the US and EU rate cards said in each monthly snapshot and what differed between them, with both months shown. Machine-generated from the snapshots; each row is a detected difference, not a confirmed policy change. Stable URL, CC BY 4.0, with citation block.
- [Hugging Face dataset mirror](https://huggingface.co/datasets/ylishi/amazon-fba-fees-2026): The same CC BY 4.0 FBA rate datasets (US + EU cards, monthly snapshots, BibTeX citation) published as a Hugging Face dataset with a dataset viewer for ML and research pipelines. Canonical, always-current copies remain on ylishi.tools.
- [Dataset release page](https://ylishi.tools/annual-fba-report/): Human-readable tables, citation format and methodology for the datasets above.

## Regional Pages
- [EU FBA Calculator — France & Pan-EU vs EFN](https://ylishi.tools/eu-fba-calculator/): Amazon FBA calculator for France, Germany, Italy, Spain and other EU marketplaces, comparing Pan-EU vs EFN cross-border fees with 2026 rates.

## Key Guides & Blog
- [Amazon FBA Fees 2026 Guide](https://ylishi.tools/blog/amazon-fba-fees-2026.html): Full breakdown of 2026 FBA fees.
- [Amazon PPC Guide 2026](https://ylishi.tools/blog/amazon-ppc-guide-2026.html): Complete PPC campaign guide.
- [Best Free Amazon Seller Tools 2026](https://ylishi.tools/blog/best-free-amazon-seller-tools-2026.html): Top free tools ranked and compared.
- [Amazon Profit Margin Calculator Guide](https://ylishi.tools/blog/amazon-profit-margin-calculator-guide.html): How to calculate real profit margins.
- [Amazon Seller Fees 2026 Guide](https://ylishi.tools/blog/amazon-seller-fees-2026-guide.html): All 2026 seller fees explained.
- [EU VAT Registration Cost Guide](https://ylishi.tools/blog/eu-vat-registration-cost-guide-2026.html): EU VAT setup costs explained.
- [Amazon Low Inventory Fee 2026](https://ylishi.tools/blog/amazon-low-inventory-fee-2026.html): How to avoid low inventory fees.
- [Amazon FBA Storage Fees 2026](https://ylishi.tools/blog/amazon-fba-storage-fees-2026.html): Storage fee calendar and rates.
- [Amazon PPC vs DSP 2026](https://ylishi.tools/blog/amazon-ppc-vs-dsp-2026.html): Which advertising type wins in 2026.
- [Amazon EU Returns Guide 2026](https://ylishi.tools/blog/amazon-eu-returns-guide-2026.html): EU return policies for sellers.
- [Amazon FBA Size Tiers & Dimensional Weight 2026](https://ylishi.tools/blog/amazon-fba-size-tiers-dimensional-weight-2026.html): How Amazon size tiers and dim weight affect fulfillment fees.
- [Pan-European FBA vs EFN 2026](https://ylishi.tools/blog/pan-eu-vs-efn-comparison-2026.html): Costs, pros and cons, plus free Pan-EU vs EFN calculator.
- [SellerSprite vs Helium 10 Review 2026](https://ylishi.tools/blog/sellersprite-vs-helium-10-2026.html): Which Amazon seller tool wins for China sellers.
- [Temu vs Amazon Profit Calculator 2026](https://ylishi.tools/blog/temu-vs-amazon-profit-calculator-2026.html): Compare Temu and Amazon fees and profit margins.

## Deep Guides
- [Amazon FBA Cost Tracker Guide](https://ylishi.tools/guides/amazon-cost-tracker-guide.html): Track every FBA fee and protect your profit margin.
- [Amazon FBA Fee Alerts Guide](https://ylishi.tools/guides/amazon-fee-alert-guide.html): Catch hidden FBA fee changes before they eat your profit.

## About
- [About ylishi.tools](https://ylishi.tools/about.html): About the site and the tool suite.