墨观MoGuan
AI-enhanced · Your PDF is never uploaded

墨观 · MoGuan

An all-in-one, AI-enhanced PDF toolkit. Compress, merge, split, convert to Markdown, and translate — all right inside your browser.

PDF not uploaded
AI-enhanced
Instant
中Chinese-first

Classic tools

100% in-browser · Unlimited · Free

Compress PDF

Shrink file size — keep text searchable or rasterize hard

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Merge PDF

Combine multiple PDFs into one, in your chosen order

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Split PDF

Extract pages, or one PDF per page in a zip

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Rotate PDF

90 / 180 / 270° on all or selected pages

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AI tools

Powered by DeepSeek

PDF → Markdown

AI extracts text and structural hierarchy

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AI Summary

Brief or bullet points — grasp a long doc in 30s

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Translate

7 languages: zh ⇄ en, ja, ko, fr, es, de

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Ask the PDF

Upload, then chat — AI answers from the content

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Why MoGuan

Privacy first

Everything runs in your browser. Your PDF never leaves your computer, let alone reaches a server. Not a marketing line — it's how it's built. Test it offline.

AI-enhanced

Beyond the classics, DeepSeek powers PDF→Markdown, summaries, translation, and document Q&A. PDFs you can understand and rewrite, not just view.

中

Tuned for Chinese

Chinese-first UI and AI prompts tuned for Chinese content. Noticeably more accurate on Chinese PDFs, scans, and official documents than generic tools.

FAQ

Do my files get uploaded to your servers?

The classic tools (compress / merge / split / rotate) run 100% in your browser — nothing is sent anywhere. AI tools call a language model, but only the extracted text is sent, and we tell you clearly before doing so.

What are the free-tier limits?

Classic tools are entirely free and unlimited (near-zero cost). AI tools include 5 free uses per day; beyond that, ¥29/month unlocks unlimited.

Does it support Chinese PDFs?

Yes. The whole UI is Chinese-first and AI prompts are tuned for Chinese. Chinese OCR on scans is more accurate than generic tools (DeepSeek understands Chinese notably better than English-centric models).

How much can compression save?

Standard mode (keeps text searchable) typically saves 10–30%. Strong mode (full-page rasterization, text becomes image) usually saves 60–80% — great for scans.

What's the file size limit?

Currently 50MB per file. If you need larger, tell us your use case and we'll prioritize it.

How is this different from iLovePDF / Smallpdf?

Three things: (1) the classic tools (compress/merge/split/rotate) run 100% in your browser — your PDF is never uploaded to any server; (2) Chinese-first — the UI, AI prompts, and understanding of Chinese PDFs and scans are all tuned for Chinese content; (3) no login, lightweight, and fast to access from within China.