Smart Convert – Currency & Unit Conversion

Smart Convert – Currency & Unit Conversion is not just another calculator, it is a complete conversion infrastructure for WordPress sites. Designed for performance and flexibility, it handles everything from simple currency exchanges to complex, non-linear physical unit conversions (like Temperature).

Whether you run a travel blog, or a technical documentation hub, this plugin ensures your visitors see accurate conversions in a format that fits your design.

🚀 My Ambition: Premium Features for Free With this initial release, my goal is to set a new standard for what a free plugin can offer. I believe advanced tools shouldn’t be locked behind a paywall. That is why Smart Convert includes enterprise-grade features usually found only in paid versions: a Custom Unit Builder, a Template Engine, Import/Export capabilities, and Automatic Geolocation—all completely free.

🌟 Key Features

💰 Advanced Currency Engine * Rates: Supports 153 global currencies + cryptocurrencies (BTC, ETH, etc.). * Smart Geo-Location: Automatically detects visitor IP to display their local currency (powered by ipinfo.io). * «Spread» & Fees: Add a percentage markup (e.g., 2%) to exchange rates to simulate bank fees or retail pricing. * Smart Rounding: Intelligently adjusts decimals (e.g., 0 decimals for JPY, 6 decimals for BTC).

📏 Comprehensive Unit Converter * 105+ Built-in Units: Covers 14 categories including Length, Mass, Volume, Temperature, Pressure, Energy, Speed, and Data. * Bi-Directional Custom Units: Creating a unit like «Box» (e.g., 1 Box = 12 Items). The plugin automatically generates the reverse conversion logic for you. * Complex Math: Handles non-linear conversions (like Fahrenheit to Celsius) with precision offset calculations.

🎨 Visual & Editor Integration * Native Gutenberg Block: Visually configure conversions (Amount, From, To, Decimals) with a live backend preview. * Inline Toolbar Tool: Select any text in your post and convert it instantly using the rich text toolbar button. * Interactive Tooltips: Solves the common «overflow:hidden» clipping issue using a smart portal strategy to display rates on hover. * Template System: Design your output using placeholders like {FROM}, {TO}, {RATE}, and {DATE}.

⚙️ Performance & Workflow * Zero Database Bloat: Uses robust Object Caching and Transients. * Import/Export: Transfer your custom templates and custom units between sites via JSON. * Privacy First: External connections are disabled by default until explicit consent is given via the Onboarding Wizard.

🌍 Internationalization & Translations

Smart Convert – Currency & Unit Conversion is fully localized and ready for global audiences. The plugin is translated into the following languages:

• English
• Spanish (Español)
• Japanese (日本語)
• German (Deutsch)
• French (Français)
• Russian (Русский)
• Brazilian Portuguese (Português do Brasil)
• Italian (Italiano)
• Czech (Čeština)
• Dutch (Nederlands)
• Turkish (Türkçe)
• Polish (Polski)
• Indonesian (Bahasa Indonesia)

⚖️ Privacy & External Services Disclosure

To provide up-to-date exchange rates and geolocation features, this plugin may connect to selected third-party services. No data is sent without your explicit consent via the settings page.

1. Currency & Unit Data (Google Sheets via Proxy)

   • Service: Downloads conversion rates from public datasets.
   • Mechanism: Requests are routed through a static redirect wrapper on petrnovak.cz to ensure link stability.
   • Data Sent: Your server’s IP address (standard HTTP request). No visitor data is sent.
   • Policy: Google Privacy Policy
   • Proxy Policy: PetrNovak.cz Privacy Policy

2. Geolocation (IPinfo.io)

   • Service: Used only if «Auto-detect currency from IP» is enabled in settings.
   • Mechanism: Sends the visitor’s IP address to IPinfo.io to determine their country code (e.g., «US»).
   • Data Sent: Visitor IP Address.
   • Policy: IPinfo Privacy Policy