MoGuan PDF
A local PDF toolkit built for people who handle sensitive documents. Compress, merge, split, edit, and convert all run inside your browser — files are never uploaded to any server. A lawyer's contract, an HR resume, a finance report: none of it should be uploaded to someone else's cloud first.
Moguan PDF is a privacy-first PDF toolkit: 33 tools, all free, all in the browser — no signup, nothing to install. Its 27 classic tools (merge, split, compress, encrypt, redact, OCR and more) have no file-upload path in the code and keep working offline; the 5 AI tools and the optional “AI reflow” inside PDF-to-Word send only the plain text already extracted in your browser to DeepSeek — your original PDF is never uploaded.
Classic tools
100% in-browser · Unlimited · Free
Edit pages
Delete · numbers · watermark
Delete pages
Remove unwanted pages, keep the rest
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Page numbers
Bottom page numbers, position & format
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Watermark
Tiled diagonal text watermark, CJK ok
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Reorder pages
Drag thumbnails to reorder pages
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Encrypt / Decrypt
Set a password, or remove with password
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Unlock PDF
Remove password & restrictions locally
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Redact PDF
Find phone/ID numbers and black them out — text truly deleted
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Crop PDF
Trim page margins or auto-trim whitespace
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Sign PDF
Draw or upload a signature, drag to place
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Remove blank pages
Auto-detect and delete blank scan pages
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Add image / stamp
Stamp an image or seal, optionally all pages
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Bates numbering
Sequential page numbering for legal/audit
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Photo EXIF Viewer
View and remove photo metadata and location records
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Convert
Images ↔ PDF · long image
Images to PDF
Combine JPG / PNG into one PDF, reorderable
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Print Images to Exact Size
Set mm, cm, or inch sizes, auto-layout, and export a print-ready PDF
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Image Converter
Convert HEIC/PNG/WebP to JPG locally.
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ID Photos to PDF
Crop & lay out ID front/back on a compliant A4 PDF
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PDF to Long Image
Stitch all pages into one tall image to share
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PDF to Image
Export each page as JPG / PNG, zipped
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PDF to Word
Extract to editable .docx, optional AI re-flow
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PDF to Excel
Rebuild tables to .xlsx by coordinates
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OCR
Extract text from scans/images, CJK ok
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Invoice Batch Rename
Read invoice no. / amount / date, rename in batch by template
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AI tools
Powered by DeepSeek
AI Smart Split & Rename
Mark boundaries locally, or get AI suggestions, then download
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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
Open a PDF, then chat — AI answers from the content
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Content creation
Markdown · WeChat articles
Why MoGuan
Files never leave your computer
Compress, merge, split, rotate, delete pages, watermark, crop… these tools all run inside your browser — the original file is never uploaded, and they work offline. By contrast, iLovePDF and Smallpdf upload your file to their servers first, then process it (typically kept for an hour or two). For contracts, resumes, and reports, one fewer upload is one less chance of a leak.
AI that reads the document, when you want it
DeepSeek can detect document boundaries, suggest filenames, summarize, translate, answer questions, and re-flow extracted text — only text is sent, never the original PDF or page images.
Every tool free · zero install · open and go
All 33 tools are free and unlimited, with nothing crippled. No signup, no download, no environment to set up — open the page and go, and files save straight back to your device. The UI is bilingual, and AI prompts are tuned for Chinese content too.
FAQ
Do my files get uploaded to your servers?
Most tools (compress / merge / split / rotate / delete / watermark / crop / encrypt / to image, etc.) run 100% in your browser — nothing is sent anywhere. Only when you actively choose an AI mode (such as smart split suggestions / summary / translate / Q&A / to Markdown, plus PDF→Word's optional AI re-flow) is extracted text sent to a language model — never the original PDF or page images — and the UI tells you before doing so. Smart split's local manual mode sends no document content.
What are the free-tier limits?
All 33 tools are free and unlimited — nothing is crippled, and no signup is required. Only the AI features have a daily quota: 5 uses per feature per day without an account; signing in raises the free tier to 30 translated pages, 20 Q&A turns, 10 summaries, 10 Markdown conversions and 10 smart splits per day. Pro buys larger quotas and higher file-size limits — it does not unlock features.
Does it support Chinese PDFs?
Yes. The UI is bilingual, and AI summary, translation, and Q&A work well on Chinese content. Scanned-document OCR uses a local tesseract engine for Chinese and English, running entirely in your browser with no upload.
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?
It depends on the tool: text extraction (Markdown / Q&A / summary / Excel) supports up to 200MB per file, the same on Free and Pro; PDF-to-image and Split allow 100MB in browsers with streaming save (Chrome / Edge) and 50MB elsewhere; other tools are 50MB on Free, and the structural editors (sign, to-Word and similar) go to 100MB on Pro. Compression and OCR rasterize whole pages, so their 50MB ceiling is the browser engine's memory limit — Pro does not raise it.
How is this different from iLovePDF / Smallpdf?
The biggest difference is privacy: MoGuan's classic tools (compress/merge/split/rotate/delete/watermark/crop, etc.) run 100% in your browser — the original file is never uploaded to any server, and they work offline — whereas iLovePDF and Smallpdf upload your file to their servers first, then process it (typically kept for an hour or two). MoGuan also needs no login or install; and its AI tools send only the extracted text, never the original PDF.