Mokuro and MangaLens are often mentioned together, but they solve different problems. Mokuro is a free, open-source OCR tool for Japanese learners; MangaLens is a zero-setup AI translator for anyone who just wants to read. Here's an honest comparison to help you pick.
Mokuro is a free, open-source tool that runs OCR on manga you have already downloaded, turning the Japanese into selectable text so you can study it with a dictionary — it does not translate. It's superb for serious Japanese learners, but it needs command-line setup and only works on local files. MangaLens needs no setup, actually translates the dialogue into 65+ languages, and works in place on any live manga site.
Install a Chrome extension and read. No Python, no command line, no downloading volumes first.
Get the dialogue in your language — not just selectable Japanese text to look up yourself.
Translate live on MangaDex, Webtoon, Rawkuma and hundreds more — not only local files.
Read in English, Spanish, Portuguese, Indonesian and 60+ more — not Japanese-only.
| Feature | MangaLens | Mokuro |
|---|---|---|
| What it does | Detects bubbles & translates Full translation overlaid in place |
OCR only Makes Japanese text selectable; no translation |
| Setup | One-click extension No technical setup |
Python / command line Run it on downloaded files yourself |
| Where it works | Any live manga site MangaDex, Webtoon, Rawkuma + hundreds |
Local downloaded files Generates an offline HTML reader |
| Languages | 65+ output languages Translate into your language |
Japanese OCR Source-text only; you translate it |
| Best for | Readers who want to enjoy the story Instant, effortless reading |
Japanese learners Studying with a dictionary / pop-up tool |
| Price | $4.99/mo · unlimited 200 free translations to try |
Free & open-source No cost; self-hosted |
| Offline use | Online (cloud OCR) Works wherever you browse |
Fully offline Runs locally once set up |
Mokuro is an excellent project, and for the right person it's the better choice:
Completely free, transparent, and community-driven. No subscription, ever.
Selectable text pairs perfectly with pop-up dictionaries like Yomitan — ideal if your goal is to study Japanese, not skip it.
Everything runs locally on your own machine, with no images leaving your computer.
Install the extension and read. No Python, no command line, no downloading manga volumes before you start.
Mokuro gives you selectable Japanese to look up yourself. MangaLens hands you the actual dialogue in your language.
Read straight on MangaDex, Webtoon, Rawkuma and hundreds more — no need to download files first.
Not Japanese-only. Read in English, Spanish, Portuguese, Indonesian, and 60+ more.
Try MangaLens with 200 free translations — no credit card, no command line. Just install and read.
⚡ Try MangaLens Free — 200 TranslationsComparing other options? See MangaLens vs Google Translate or our full comparison hub.