PDF 分析器
免費·無需註冊·檔案永不離開你的裝置
How to inspect a PDF in 3 steps
X-ray any document: what's inside, how it's built, and whether it's carrying anything unusual.
Upload the PDF
Drop the file in the box above. Parsing happens locally, in seconds.
Read the report
Page count, dimensions, version, encryption, fonts, images, and structural statistics — all on screen.
Act on what you find
Fix oversized scans, spot unembedded fonts, or verify encryption — with the right sibling tool.
Why analyze PDFs with AmiPDF
Diagnose before you fix — or before you trust.
隱私優先
處理完全在你的瀏覽器內完成。不上傳、不儲存、不外傳——絕不。
無需註冊，無浮水印
無賬號、無郵箱、無限制。輸出檔案與輸入完全一致。
Security at a glance
See instantly whether a file is encrypted, and what its structure contains — useful before opening documents from unknown sources.
任何裝置可用
Windows、Mac、Linux、Android、iOS 上體驗一致——無需安裝。
When to analyze a PDF
Debugging a file that won't print, checking whether fonts will render on another machine, understanding why a “small” document is 80 MB, or inspecting a download before opening it. Analysis is the first step of informed PDF work.
The file is parsed in your browser and never uploaded.
Analyze PDFs on any platform
AmiPDF 在你的瀏覽器中執行——無需安裝、無需配置、無需更新。
Windows
Chrome, Edge, Firefox
macOS
Safari, Chrome
Linux
Any modern browser
iOS
Safari on iPhone, iPad
Android
Chrome, Samsung Internet
Frequently asked questions
What exactly does the report include?
Page count and per-page dimensions, PDF version, encryption status, font inventory with embedding info, image count, and object-level statistics.
Does the analyzer produce a file?
No — it's read-only. The findings appear as a report on the page; your original file is never modified.
Can it tell me why my PDF is so large?
Yes, directionally — a large image count or many embedded font programs are the usual suspects, and both show in the report.
Does it detect malware?
No — it inspects structure, not threat signatures. Treat it as an X-ray, not an antivirus. For untrusted files, use a real scanner.
Can I analyze encrypted PDFs?
The report shows encryption status and metadata visible without the password. Deep analysis needs the unlocked file.
Is my document uploaded for analysis?
No. Parsing runs entirely in your browser.
相關 PDF 工具
繼續——處理 PDF 所需的其他工具，全部免費、全部本地執行。