EBMac is a native macOS application for reading offline electronic dictionaries in EPWING and EB formats — the standard used by thousands of Japanese, English, and multilingual reference works published on CD-ROM and still widely distributed today.
What is EBMac?
EBMac is a free, Mac-native dictionary reader that opens EPWING-format reference databases locally on your machine, with no internet connection required. EPWING is a Japanese Industrial Standard for electronic publications, and it underpins an enormous library of serious reference material: medical dictionaries, legal glossaries, JLPT study decks, classic Japanese literature databases, monolingual J-J dictionaries unavailable in any app store, and English references like the full Oxford series. If you have ever wondered how serious Japanese-language learners and translators keep an authoritative offline reference at their fingertips on a Mac, EBMac is almost always the answer.
What does EBMac do best?
EBMac handles large, multi-volume EPWING catalogs with minimal friction — the kind of reference sets that would bring a generic viewer to its knees. I keep a stack of seven dictionaries loaded simultaneously: a monolingual Kōjien, a modern kanji character index, an English-Japanese technical glossary, and a few JLPT frequency lists. Search is near-instant across all of them in one query, which is the feature that keeps me coming back over every web-based alternative.
The interface is spartan in the best way. There are no accounts, no telemetry calls, no subscription nags — just a search field, a dictionary panel, and rich formatted output that respects the typography encoded in each EPWING title. Inline images (diagrams, character stroke-order graphics) render correctly, which many competing viewers drop entirely.
- Cross-dictionary simultaneous search — query all loaded books in one keystroke
- Compound searches — keyword, prefix, suffix, and exact-match modes per EPWING spec
- Inline image support — stroke-order diagrams and encyclopedia illustrations render in-pane
- Multiple catalog management — group and name sets of dictionaries by project or language level
- System Services integration — look up selected text from any app via the macOS Services menu
Is EBMac free?
EBMac is free to download from the developer's site. There is no paid tier, no trial expiry, and no feature locked behind a purchase. The developer, EBStudio, has maintained the app for many years without moving to a subscription model — a rarity in the dictionary-software niche. That said, the EPWING reference databases themselves are sold separately and can range from inexpensive hobbyist packs to premium professional titles costing several hundred dollars; EBMac is simply the viewer.
Who should use EBMac?
EBMac earns its place on the dock of anyone doing serious Japanese-language work on a Mac: translators, academic researchers, language students past intermediate level, and anyone who has bought a boxed Japanese dictionary CD-ROM and wants to actually use it on modern hardware. It is also valuable for medical and legal professionals who rely on authoritative EPWING-format Japanese reference databases not available in any app store or online service.
If your dictionary needs are covered by the built-in macOS Dictionary app or a casual app like Takoboto, EBMac may be more than you need. It rewards users who have already assembled a personal EPWING library — without that corpus, the app has nothing to read. But for anyone in that situation, there is genuinely no better option on macOS. Competitors like Qolibri (cross-platform, Qt-based) and Dictionary.app (great for Apple's bundled titles, useless for EPWING) don't come close to EBMac's polish and macOS integration.
How does EBMac compare to Qolibri?
Qolibri is the main cross-platform alternative for EPWING lookups, and it has excellent dictionary coverage — but it is a Qt application that wears its Linux origins visibly on macOS. EBMac, by contrast, is a proper Cocoa app: it respects system dark mode, integrates with macOS Services, behaves correctly on Retina displays, and does not fight the window manager. If you work exclusively on a Mac and care about your environment feeling coherent, EBMac is the clear choice. Qolibri is worth considering only if you split time between macOS and Linux or Windows and need an identical experience everywhere.
What are the best EBMac alternatives?
For EPWING-format dictionaries, Qolibri is the main cross-platform rival. For broader offline dictionary work on macOS, Dictionary.app handles Apple-licensed titles well, and Lingvo covers multilingual needs with a commercial catalog. For Japanese specifically, Takoboto and jidoujisho on iOS/Android are popular, but neither runs natively on macOS with the same depth of EPWING coverage. There is no direct equivalent that matches EBMac's combination of Mac-native UX and serious EPWING support.
