RateConvert Pro - Currency Converter & Exchange Rate Tracker

RateConvert Pro is a lightweight PHP + MySQL currency converter and exchange-rate management tool built for freelancers and agencies who need a reliable converter without depending on a paid API subscription. Rates live in your own database, so the public converter keeps working even if you never touch the optional live-fetch feature. Admins get a clean dashboard to manage currencies, edit rates by hand, and track every rate change in a built-in history log. Drop the included widget into an iframe on any client site in minutes, and ship it on ordinary shared hosting: no Composer, no framework, no build step.

Features:

- Instant currency conversion using locally stored rates: no per-conversion API call

- Client-side live recalculation as the user types (no page reload)

- Admin dashboard with secure, hashed-password login

- Full currency management: add, edit, activate/deactivate currency codes

- Manual rate editor with a "last updated" timestamp shown publicly

- Optional one-click "Fetch Latest Rates" from a free public exchange-rate API (no API key required by default)

- Automatic rate history logging on every update, manual or fetched

- Per-currency rate history table for tracking trends over time

- Embeddable widget mode (widget.php) for iframe embedding on any site, with its own minimal styling

- CSRF-protected forms, PDO prepared statements, and escaped output throughout

- Works on standard shared hosting: no Composer, no CLI build step, no cron required

New in version 2:

- Rate alerts, a multi-currency calculator, and an inline rate history chart

- A configurable auto-refresh interval for live rates, and widget query parameters for currency selection, theme, and starting pair

- CSRF protection on all forms, rate limiting on login and the public widget, and a fix so the widget no longer shares a session cookie with the admin app

- Database indexes, a short-lived cache for the widget and calculator, and pagination on rate history for long-running installs

Existing v1 customers can upgrade their database in place using the upgrade guide included with the download.

Requirements

PHP 7.4 or newer MySQL 5.7+ or MariaDB 10.3+

Compatibility

PHP 7.4 - 8.3, MySQL/MariaDB