Open Dict · Features

A closer look at every word.

Read original dictionary entries, compare sources, ask for a different explanation, and save what you want to remember.

Open dictionary formats
MDX / MDD
MDX / MDD

An established dictionary format with rich layouts. MDX stores entries; companion MDD files can hold images and audio. A broad community library ecosystem.

MOBI
MOBI

A dictionary format used in the Kindle ecosystem. Reuse your MOBI dictionaries or explore free dictionaries built from Wiktionary.

StarDict
StarDict

A mature, open dictionary format with broad cross-platform support. FreeDict and WikDict offer many free, open multilingual dictionaries.

dictd
dictd

An established open format from the DICT ecosystem, focused on indexed text entries. FreeDict offers free multilingual dictionaries.

TXT / TSV
TXT / TSV

Lightweight plain-text and tab-separated formats. Easy to edit your own glossary or import open vocabulary data, with simpler layouts than rich-text dictionaries.

Your dictionaries, together

Import open-source, free, community and personal dictionaries. Search locally, even offline.

The free version supports up to 5 dictionaries, with no other feature restrictions or time limit. A one-time purchase removes the dictionary limit permanently. Open Dict has no subscription.

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Your dictionaries, together

AI definitions, your way

Use your own API key and choose a model. Start with built-in prompts or create concise definitions, learner explanations and multilingual examples.

Why bring your own API key? →
Built-in prompts or your own learning style
Built-in prompts or your own learning style
Learner explanations
Learner explanations

Original layouts, light or dark

Keep rich dictionary layouts, examples and images across MDX, MOBI, StarDict and dictd. Play MDD audio and adapt entries to dark mode.

MOBI · Original layouts, light or darkStarDict · Original layouts, light or dark

Keep the sentence that matters

Highlight examples and add your own notes inside an entry. Revisit saved passages and return to the original definition.

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Keep the sentence that matters

Look up here, review anywhere

History, word groups, notes and AI configuration stay with you through your personal iCloud account.

Open Dict · iPad · Look up here, review anywhere

Mac

A lookup away from your work.

Open the quick lookup window from the Mac menu bar, or select text in another app and use the system service to look it up in Open Dict.

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Universal App · Mac / iPad / iPhone

One purchase. Mac, iPad, iPhone.

Permanently unlock unlimited dictionaries with one purchase. Your purchase works on Mac, iPad and iPhone with the same Apple Account. No subscription.

Start free
Use up to 5 dictionaries with no other feature restrictions, free for as long as you like.
Unlock unlimited dictionaries
Mac · iPad · iPhone
Download for Mac
App Store · iPhone / iPad

iPhone / iPad · Coming soon

Open Dict · iPad · Look up here, review anywhere
iCloudHistory, word groups, notes and AI configuration stay with you through your personal iCloud account.