線上PDF閱讀器

免費線上PDF阅读器。在瀏覽器中查看PDF。

開啟 PDF 檔案

開啟 PDF 檔案進行閱讀和查看。

關於此工具

在瀏覽器中查看PDF文件。

使用方法

打开PDF
上傳PDF檔案。
导航頁面
使用頁面控制导航。
调整视图
放大、缩小或旋转。

使用場景

文件审阅

快速审阅PDF文件。

移动阅读

在任何设备上阅读PDF。

快速預覽

預覽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

常見問題

文件安全吗？

是的，完全在瀏覽器中處理。

可以編輯吗？

此工具仅用于查看。

支援移动设备吗？

是的。

签署PDF編輯與註釋

編輯PDF編輯與註釋