Free Tools

22 tools that every cross-border seller needs daily — free, no signup required. Pure formulas or local in-browser processing, no AI calls, free forever.

50 seconds: the daily seller math, done in the free tools

Product demo · 0:50 · English on-screen copy, no narration. Profit, FBA size tier, dimensional weight, duty estimates, AI-person photo tagging — plain formulas, no AI calls, free to use.

What the video shows (text version)

• 0:00 · Title: get the daily seller work done faster — free tools for cross-border sellers.
• 0:04 · Profit Calculator (finance): product price 59.99, Amazon referral fee 8% (4.80), FBA fee 5.14, product cost 18.00, inbound freight 2.60, ads at 13% ACOS (7.80). Result: net profit per unit $21.65, 36.1% margin, 105% ROI, break-even price $32.58, break-even ACOS 49%. Know your margin before you list.
• 0:14 · AI Person Photo Tagging (compliance): a grid of 48 product photos. Verify & tag runs locally with no upload and pixels untouched; the "contains synthetic performer" disclosure is written into each image file.
• 0:22 · Restock Planner (logistics): 15 days factory lead time plus 30 days shipping and 5 days inbound make a 50-day total lead time; with a 14-day safety buffer and demand variability of 1.5, the reorder point comes out at 1,420 units.
• 0:32 · A+ Image Auto-Splitter (operations): a long A+ image, module gaps detected, split into module_1 to module_5 and exported as one zip, processed locally with no quality loss.
• 0:42 · A map of the tool set: profit calculator, restock planner, AI photo tagging, FBA size tier, A+ image splitter, VAT quick lookup, keyword density, FX profit impact and more.

Categories

💰 Finance (7 tools)

Tool	Input	Output
Profit Calculator	Price, cost, shipping, ads, commission	Profit, margin, risk flags
Procurement List	Priced products, target margin	Margin / ROI / landed-cost comparison, groups, statuses, Excel import & export
Breakeven Calculator	Fixed cost, price, variable cost per unit	Breakeven units & revenue
ACoS to ROAS Calculator	Ad spend, ad-driven sales — or just one of ACoS / ROAS	ACoS%, ROAS, target bid; direct ACoS ⇄ ROAS conversion
Seller Fee Comparison	Price, category	Net profit on Amazon / Walmart / Newegg / eBay side by side
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 (3 tools)

Tool	Input	Output
AI Person Photo Tagging	Product photos containing AI-generated people	Amazon contains-synthetic-performer disclosure tag written locally, batch export
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 (2 tools)

Tool	Input	Output
A+ Image Auto-Splitter	One A+ long image (JPG / PNG)	Module images cut at the gap bands, numbered zip
Inventory Turnover Calculator	Monthly sales, on-hand stock, unit cost	Days of inventory, tied-up capital, industry benchmark

💱 Currency (1 tool)

Tool	Input	Output
Payout Exchange Rate Calculator	Amount, from-currency, to-currency	Converted amount, exchange rate, inverse rate — check your marketplace payout 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 or run entirely in your browser, so they carry 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 →