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.
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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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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Convert
Images ↔ PDF · long image
Images to PDF
Combine JPG / PNG into one PDF, reorderable
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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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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 summarize, translate, answer questions, and re-flow the extracted text — only the text is sent, never the original PDF. AI tools are free 5×/day.
Free · no login · instant
Classic tools are completely free and unlimited, with no signup or install — open the page and go, download straight 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 the AI features (summary / translate / Q&A / to Markdown, plus PDF→Word's optional AI re-flow) call a language model, and they send only the extracted text — never the original PDF — and 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; an unlimited paid plan is coming soon.
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; PDF-to-image and Split allow 100MB in browsers with streaming save (Chrome / Edge) and 50MB elsewhere; all other tools are 50MB. Need more? Tell us your use case and we'll prioritize 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.