Open Source Currency Converter

Convert currency amounts on any webpage to your preferred currency. Rates from the European Central Bank.

A straightforward, open-source currency converter that respects your privacy. Open Source Currency Converter detects prices on web pages and converts them using daily exchange rates from the European Central Bank. Features • Automatic conversion: Detects and converts currency amounts directly on web pages • Interactive conversion: Select a currency amount to see its converted value • Hybrid mode: Combines automatic page conversion with selection tooltips • Smart detection: Handles different number formats, compact values, refunds, negative amounts, and ambiguous symbols such as “$” • Flexible formatting: Choose separate input and output number formats • Per-site controls: Disable conversion on individual websites whenever needed Why use this extension? • Open source: The complete source code is available for anyone to inspect • Privacy focused: No analytics or tracking. Page content is processed locally • Reliable rates: Uses daily reference rates from the European Central Bank • Lightweight: No advertisements, paywalls, accounts, or unnecessary features View the source code, report issues, or build the extension yourself on GitHub: https://github.com/Tokra110/open-source-currency-converter