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Free Tools

19 tools that every cross-border seller needs daily — free, no signup required. Pure formula-driven, no AI calls, free forever.

Free tools

Categories

💰 Finance (6 tools)

Tool Input Output
Profit Calculator Price, cost, shipping, ads, commission Profit, margin, risk flags
Breakeven Calculator Fixed cost, price, variable cost per unit Breakeven units & revenue
ACoS / ROAS Calculator Ad spend, ad-driven sales ACoS%, ROAS, target bid
Platform Fee Compare Price, category Net profit on Amazon / Walmart / Newegg / eBay
FX Impact on Profit USD price, CNY cost, current FX, swing Profit change, margin change
Return-Cost Impact Return rate, AOV, return-handling cost Annual loss, margin impact

📦 Logistics (3 tools)

Tool Input Output
Dimensional Weight Calculator L×W×H (cm), actual weight (kg) Volumetric weight, billable weight, carrier comparison
Amazon FBA Size Tier Dimensions, weight Standard / Large Bulky / Extra-Large tier + fee reference
Restock Lead-Time Calculator Daily sales, stock, lead time, freight days, safety stock Latest reorder date, projected stockout date

📝 Listing (3 tools)

Tool Input Output
Listing Character-Limit Checker Title, bullets, description Char counts vs platform limits, over-limit highlight
Keyword Density Analyzer Full listing copy Top 10 keywords, occurrences, density %
Readability Scorer Description text Word count, avg sentence length, Flesch score, suggestions

🛃 Compliance (2 tools)

Tool Input Output
VAT Rate Lookup Target country Standard rate, reduced rate, registration threshold
HS Code Duty Estimator HS6 code, country of origin, declared value Duty rate range, estimated duty

📊 Operations (1 tool)

Tool Input Output
Inventory Turnover Calculator Monthly sales, on-hand stock, unit cost Days of inventory, tied-up capital, industry benchmark

💱 Currency (1 tool)

Tool Input Output
Currency Exchange Amount, from-currency, to-currency Converted amount, exchange rate, inverse rate

✍️ Text utilities (3 tools)

Tool Input Output
Text Deduplication Multi-line text De-duplicated lines, duplicates removed
Case Toggle Text UPPERCASE / lowercase / Title / Sentence case
Word Counter Text Word, character, sentence & paragraph counts

How to use

  1. Open the Tools home
  2. Use the top category tabs or search to find a tool
  3. Click "Try it" on a tool card — no signup needed

Why it's free

The tools are pure-formula and have no AI compute cost. Niceggie's business model is the AI modules (Customer Service, Pre-sales, Listing, Creator outreach); the tools library is the long-term-free ecosystem on-ramp.

Sample: Profit Calculator

See the example →