Reference
Frequently Asked Questions
Rates
Where do the rates come from?
Fiat and major crypto reference values come from the CC0 currency-api dataset, served through two independent mirrors.
How current are the values?
The source dataset is daily. USDConverter shows its rate date, checks for a newer snapshot up to hourly, and marks an old source date or bounded cached fallback as stale.
Will a bank or transfer provider use the same rate?
Usually not exactly. A transaction quote can include a provider spread, explicit fees, card-network pricing, intermediary charges, or taxes.
Why can two currency sites show different values?
They may use different providers, market snapshots, base currencies, cache windows, or rounding rules.
Tools
Which currencies are supported?
The public rate feed determines the available fiat codes. The curated directory also includes supported major crypto assets.
What does the quote comparator calculate?
It compares an amount entered by you with the reference conversion, then measures the effective rate after the provider fee and received amount you supply.
Does USDConverter execute a transfer or trade?
No. It is a reference and calculation service; it does not hold funds, execute transfers, or place crypto orders.
Can I download or request the data?
The Download Rates page exports the supported dataset. The API documentation describes the versioned, CORS-enabled JSON endpoints, source date, license, and cache behavior.
Browser and privacy
Is an account required?
No account is required for the converter, quote comparison, downloads, API, or widget.
What is saved in my browser?
Theme, favorite currencies, and up to ten recent conversions may use localStorage. No third-party analytics script is currently loaded.
Does the converter work without a connection?
Rate-dependent results require a connection. A previously rendered page may remain visible, but it should not be treated as a current quote.