Open source alternatives to Definer: Word Translator, Ask AI, Popup Dictionary
50 open source AI apps to use instead, best rated first.
Top picks
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Open WebUI
LaunchSelf-hosted AI platform that connects local and cloud models, extends with Python, and keeps your data under your control.
Open sourceSelf-hosted
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AutoGPT
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Open source
- P

pi
LaunchTerminal-based coding agent with a minimal core, 15+ LLM providers, tree-structured session history, and a TypeScript extension system for building your own workflows.
Open source
- A

AFFiNE
LaunchAn open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.
Open source
- A

aider
LaunchTerminal-based AI coding tool that lets you edit existing codebases or start new projects using LLMs like Claude, GPT, and DeepSeek.
Open source
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AppFlowy
LaunchOpen source collaborative workspace combining notes, databases, and AI with full data ownership, offline support, and self-hosting options.
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About Definer: Word Translator, Ask AI, Popup Dictionary
Definer: Word Translator, Ask AI, Popup Dictionary
Use AI translator and dictionary online
Stop interrupting your reading to open another tab whenever you encounter an unfamiliar word or passage. Definer 2 brings definitions, translations, pronunciation, and AI explanations directly to the page. Double-click a word or use your preferred text-selection gesture to open the popup bubble.
- Made by
- Lumetrium
- Category
- AI
- Website
- lumetrium.com



