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Tesseract OCR for Android — Wiki

Prebuilt Tesseract 5.5.0 + Leptonica 1.84.1 AAR for Android. On-device text recognition, no NDK, no rebuild, English bundled.

implementation("dev.ffmpegkit-maintained:tesseract-android:5.5.0")

→ Beginner Tutorial — from zero to OCR, step by step, with code for every image source (file, gallery, camera, assets, network).

Beginner Tutorial — step-by-step guide with copy-pasteable code.
Quick Start — install, first OCR pass in 5 lines.
How Image Decoding Works — why there are no image codecs in the AAR (and why JPEG/PNG/WebP/HEIC all work anyway).
Languages — bundled English, adding more traineddata, model quality.
API Reference — TesseractOCR, TesseractConfig, TesseractResult.
Performance — image prep, PSM modes, release vs debug, OpenMP.
FAQ — common issues (empty text, low confidence, missing language).
Pro Integration — 12 languages, best models, OpenMP, batch API.
Building From Source — submodules, NDK, CMake.

	Free	Pro
Engine	Tesseract 5.x + Leptonica	Tesseract 5.x + Leptonica
Bundled languages	English (1)	12 (eng, fra, spa, deu, ita, por, chi_sim, jpn, kor, ara, rus, hin)
Add more languages	✅ 100+ downloadable	✅ 100+ downloadable
Model quality	`tessdata_fast` (~4 MB)	`tessdata_best` (~15 MB, max accuracy)
OpenMP	✗ single-thread	✅ multi-thread (2–3× faster)
Core API	✅ `recognize`, `recognizeFile`, confidence, bounding boxes	✅ same
Advanced API	✗	✅ hOCR, batch OCR, per-character confidence
ABI	arm64-v8a	arm64-v8a + x86_64
Image formats	JPEG, PNG, WebP, HEIC (via Android)	same
Channel	Maven Central / JitPack / GitHub Release	Gumroad
Price	$0	$24 · $62 team

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Maintained by Jokobee.