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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| Instant Domain Searchinstantdomainsearch.com | Common Papercommonpaper.com | Invoice Generatorinvoice-generator.com | XE Currency Converterxe.com | |
|---|---|---|---|---|
| What it does | Answers as you type whether a name is still available as a domain | Standard business contracts written to be read, published free under CC BY | Fills in a clean invoice in the browser and downloads it as a PDF | The exchange rate everyone quotes, live across a hundred-odd currencies |
| What it costs you | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. | No sign-upWorks the moment the page loads. No account, no email, no trial. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on their server |
| Where it stops | It is a registrar as well as a checker, so every result doubles as a sales page. | Drafted around US law and software deals — another jurisdiction or industry still needs a lawyer's eye. | It generates a document and forgets it — no client list, no numbering, no record of what was paid. | It shows the mid-market rate, which no consumer receives once a bank or card margin is applied. |
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| Category | Money, Invoices & Business | Money, Invoices & Business | Money, Invoices & Business | Money, Invoices & Business |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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