OCR PDF

使用OCR使扫描的PDF可搜索。从图像和扫描文档中提取文本。

上傳PDF檔案

拖放掃描的PDF檔案到此處，或點選瀏覽。

關於OCR

OCR（光學字元識別）從掃描文件和影象中提取文字。為獲得最佳效果，請使用高質量掃描件並選擇正確的語言。

關於此工具

OCR PDF使用光学字符识别从PDF中的扫描文档和图像中提取文本。将基于图像的PDF转换为可搜索、可选择文本的文档。

支持多种语言，确保无论文档语言如何都能准确识别文本。在添加可搜索文本层的同时保留原始布局。

所有OCR处理都在您的浏览器中进行，确保您的文档保持私密。

使用方法

上传扫描的PDF
拖放您的扫描PDF或点击选择。
选择语言
选择文档语言以获得准确识别。
处理并下载
点击处理运行OCR并下载可搜索的PDF。

使用場景

数字化存档

使扫描的文档存档可搜索。

文档搜索

在扫描文档中启用文本搜索。

文本提取

从扫描文档中提取文本以供编辑。

Practical guide

Why choose local processing?

Scanned PDFs 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 searchable PDF 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 searchable PDF.
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