LingDiff
Foreign-language PDFs, readable and human-centered.
LingDiff is a minimal reader for learners and professionals that lets you compare foreign-language PDFs side by side — papers, technical documents, and books. Spend less time switching apps and copy‑pasting, and focus on reading.
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Split view. Show the source PDF (left) and the translation (right) on one screen. Comprehension improves by simply shifting your gaze.
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One‑click translation. Select → translate → place into the right pane. Supports major translation engines; you choose the model.
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Designed for focus. Eliminates app‑switching, copy‑paste, and tab hunting. Keep your flow while doing close reading.
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Local‑first. PDFs and translation results are stored locally. No tracking, no ads. Choose a subscription or a one‑time purchase.
Who it’s for
Researchers, engineers, translators, and language learners. Designed for people who want to balance reading for work and reading for learning.