Handily use / switch any one or multiple search engines (or search any websites) via a flexible tool.

Basic

• 🔎 Use any search engines or inquery websites (multiple uninterruptedly) from one UI. Any websites that support GET/POST.
• 🔎 User adding custom-defined search engine (syncronizable in extension)
• 🔎 Support using browser-installed search engines (browser extension)

More

• 🖋? Single-line or multi-line text edit/input and sending Useful when for e.g. you want to have article paragraphs translated
• 🗂? Search engines categorization
• 📋 Save, reuse and manage your input history (only saved locally in the browser localStorage)
• 🖱? Quickly use user selected text on webpage as search term (browser extension, context menu)
• ?? Keyboard shortcut (browser extension)
  • Open popup
  • Set selected text as search termchrome://extensions/shortcuts
• 🖥? Support both desktop (browser extension & web app) and mobile (web app only) devices

Even more: What's special about it

• 🔎 Even works with those websites that don't provide GET/POST interface to public (so-called Ajax-only websites)
• 🔎 Do many operations at once by one button
• ? Good-looking, powerful and lightweight
• 💪 Uses JSON as unified search engines database (both built-in and user-defined). Has strong flexibility & extensibility in engine data:
  • 🔲 Multiple buttons for one engine: more than one operations for one engine. (Buttons inherit data from engine. Some key-value data ??in button can override the ones in engine name)
  • 📞 Cross-engine use: Call another engine (or it's certain button action) to do the action
  • 🔏 String-formatting or character-replacing user's input, according to engine's need. And, charset specifying.
  • 🔎 Combining above two to search websites that don't support search

Special technical features make it more satisfying to technician people comparing to similar tools. Of course, it is also completely easy for ordinary people to use.