PDF阅读器

免费在线PDF阅读器。在浏览器中查看PDF。

打开PDF文件

打开PDF文件进行阅读和查看。

关于此工具

在浏览器中查看PDF文档。

如何使用

打开PDF
上传PDF文件。
导航页面
使用页面控制导航。
调整视图
放大、缩小或旋转。

使用场景

文档审阅

快速审阅PDF文档。

移动阅读

在任何设备上阅读PDF。

快速预览

预览PDF。

Practical guide

Why choose local processing?

PDF documents can contain contracts, invoices, identity details, or internal business information, so keeping processing in the browser reduces exposure.
The website tool is free to use with no usage limits and does not require sign-in.
Local processing also keeps iteration fast: adjust options, preview the result, and export a private browser-based reading session without waiting for an upload queue.

Best files for this tool

Best for PDF files that open correctly in a modern browser and are not intentionally damaged or restricted.
Works well for everyday business, school, legal, finance, and personal documents where you need a private browser-based reading session.
For very large files, close unused tabs and process one batch at a time so the browser has enough memory.

Common limitations

Encrypted or permission-restricted PDFs may need to be unlocked before processing.
Scanned pages, unusual fonts, complex layers, and damaged files can reduce accuracy or processing speed.
Browser memory and device performance matter more for local tools than for upload-based services.

Local processing vs upload-based tools

Local tools keep routine website processing on your device, while upload-based tools send files to a remote server.
Upload-based services can move heavy work off your computer, but they add transfer time and require trusting a server with your files.
Use the API when you intentionally need server-side automation; use the website when you want private manual processing.

What to do if processing fails

Try a smaller file, a shorter page range, or one file at a time if the browser runs out of memory.
If a PDF is encrypted, damaged, or restricted, unlock or repair it first and then retry the workflow.
If the output looks wrong, check whether the source file uses scans, complex transparency, form fields, or unsupported embedded objects.

API automation

Use API docs to plan automated PDF workflows. If this exact website workflow is not exposed as an endpoint yet, you can still use available PDF API tools and Credits for supported operations.

View API automation docs Create API Key

常见问题

文档安全吗？

是的，完全在浏览器中处理。

可以编辑吗？

此工具仅用于查看。

支持移动设备吗？

是的。

签署PDF编辑与注释

编辑PDF编辑与注释