Seldons
Utilities for cross-border commerce
Every utility is free and needs no account. Pick the job you are doing.
UTM Generator
Build campaign parameters to one rule set and save presets so the whole team tags the same way.
Open →Unit converter
Convert length, weight, temperature, volume, torque and speed. Every pair has its own page with the exact formula and a full conversion table.
Open →Product page analyzer
Paste a product URL. We read the page and its images, then report what would stop it selling in another market.
Open →Export pricing calculator
Enter factory cost and weight to get a recommended retail price in the local currency, after duty, tax and freight.
Open →Korean business check
Trading, suspended or closed — and online-seller filing
Open →HS code lookup
Paste a product URL. We work out what the product is and estimate its six-digit HS code with a confidence score.
Open →Certification checklist
Paste a product URL. We list what each market requires and report which certification marks the page already shows.
Open →Which tool answers which question?
Every tool here answers one question that comes up when a brand sells outside its home market. If you know the question, the table picks the tool.
| The question you have | The tool |
|---|---|
| What will this cost to land in that market, and what should it retail for? | Export pricing calculator |
| What is this product's HS code? | HS code lookup |
| Which certifications does this need, and does the page already show them? | Certification checklist |
| Why does a page that sells at home not sell abroad? | Product page analyzer |
| Is this Korean counterparty actually trading? | Korean business check |
| How do we tag campaigns so the whole team tags the same way? | UTM Generator |
| How many inches is 30 cm? | Unit converter |
What these tools will not do
- They do not render JavaScript. We read the HTML a page serves and the images it links, so a page that builds itself in the browser will come back thin — and we say so rather than guessing at what was missing.
- Duty rates, tax rates and de minimis thresholds are defaults to check, not rulings. Every one carries the month it was taken and the source, and the calculator lists every assumption it had to make instead of hiding them in a single number.
- The AI estimates are estimates. An HS code comes back with a confidence score and alternatives, because a six-digit code that is wrong with no warning costs more than no code at all.
- They do not store what you type. The converter and the pricing calculator run entirely in your browser; the rest send your input to our server for the model to work on and keep nothing afterwards.
Where the numbers come from
Duty, tax and freight figures come from a market table we maintain by hand and date; exchange rates refresh weekly. Korean business status comes from the National Tax Service, and online-seller filings from the Fair Trade Commission — both named on the page, with the retrieval time shown. When a source is unreachable we say the answer is cached and how old it is, rather than presenting stale data as current.