PDF 分析器
免费·无需注册·文件永不离开你的设备
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.
隐私优先
处理完全在你的浏览器内完成。不上传、不存储、不外传——绝不。
无需注册，无水印
无账号、无邮箱、无限制。输出文件与输入完全一致。
Security at a glance
See instantly whether a file is encrypted, and what its structure contains — useful before opening documents from unknown sources.
任何设备可用
Windows、Mac、Linux、Android、iOS 上体验一致——无需安装。
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 在你的浏览器中运行——无需安装、无需配置、无需更新。
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.
相关 PDF 工具
继续——处理 PDF 所需的其他工具，全部免费、全部本地运行。