v0.9  ·  Windows Desktop

MelliLex

/ ˈmɛli.lɛks /
noun — software

An AI-powered word and phrase explorer for Windows.
Ctrl+right-click any word, anywhere, and understand it completely.

Download for Windows View on GitHub
Windows 10 / 11  ·  Free  ·  MIT License
MelliLex word lookup interface
Everything you need

Look up anything.
Understand everything.

MelliLex goes beyond a definition. Every lookup gives you meanings, pronunciation, formality, usage domains, memory tips, and example sentences — all from one keystroke.

Ctrl + Right-click
Global hotkey that works in any application — browser, PDF reader, ebook, email client. No copy-paste needed.
OCR capture
Automatically switches to OCR for non-selectable text — Kindle, Adobe Acrobat, Foxit, SumatraPDF.
Phrase support
Full idiom analysis with literal meaning, origin story, register, and usage context.
Explore mode
Dive deeper with formality analysis, domain examples, common mistakes, and practice exercises.
Spell check
SymSpell-powered corrections before every lookup, so typos never return wrong results.
Export
Save results to Markdown, plain text, or directly to Capacities as a structured word note.
Global lookup settings
Global lookup

Works in every app on your system

MelliLex registers a system-wide hook. Ctrl+right-click any word, in any window, and the result is on screen in seconds.

  • No need to switch to a browser or dictionary app
  • Automatic OCR fallback for PDFs and ebooks
  • Runs quietly in the system tray — zero friction
Domain examples in Explore mode
Explore mode

Go deeper than the definition

Explore mode unpacks a word across every dimension — where it's used, how to use it correctly, and how to make it stick.

  • Domain breakdown: academic, legal, creative, business
  • Common mistakes with correct alternatives explained
  • AI-generated practice exercises, regenerated on demand
  • Formality score from casual to highly formal
Powered by your AI

Your key, your provider.

MelliLex works with any major AI provider — or with a local model via Ollama, completely offline and free.

Anthropic
Claude Haiku 4.5
recommended
Google Gemini
Gemini 2.5 Flash Lite
recommended
OpenAI
GPT-5 mini
supported
Ollama
any local model
offline

Start reading better.

Download MelliLex and understand every word you read — instantly, without leaving your flow.

Download for Windows GitHub
Windows 10 / 11 No subscription MIT License 11 UI languages