Windows 10 上的 OCR（免费在线工具）

Extracting text from a single picture

1. Right-click the picture, and click Copy Text from Picture.
2. Click where you'd like to paste the copied text, and then press Ctrl+V.

Extracting text from the images of a multipage file printout

1. Right-click any of the image files, and then do one of the following:
   • Click Copy Text from this Page of the Printout to copy text from only the currently selected image (page).
   • Click Copy Text from All the Pages of the Printout to copy text from all the images (pages).
2. Click where you'd like to paste the copied text, and then press Ctrl+V.

OnlineOCR

OnlineOCR is a professional online OCR service with a clean and simple design. The appearance of this website might look a little dated since it was created in 2009, but this also helps keep the OCR operations pretty simple for users.

OnlineOCR allows you to recognize scanned PDF documents, photographs, and digital camera-captured images, and convert them to editable files such as Word, TXT, and Excel. There are 46 different languages that can be recognized, including English, Spanish, Japanese, Chinese, and Korean.

Getting an OCR job done with OnlineOCR takes just three easy steps.

Step 1. Hit the "Select file" button to upload a PDF file or a scanned document in JPG, BMP, GIF, or TIFF format. You can also upload multiple files in one go. Note: the maximum file size you can upload is 15 MB.

Step 2. Select the language of the file you upload and choose an output format from Word, Excel, and TXT.

Step 3. Click "Convert" to start recognizing and converting your files.

NewOCR

Another free online OCR tool is NewOCR, which can analyze the text in an image file or PDF document that you upload, and then convert it to a text document that can be edited easily on your computer. Every user can enjoy unlimited uploads without any registration requirements. All the files you upload will be deleted from the server, so there is no need to worry about file security.

First, click "Choose File" to add an image or scanned documents from your device, then click "Preview".

Next, choose one or multiple recognition languages in the language box, then rotate the image if needed. If your uploaded file contains multi-column text, tick the "Page layout analysis" tab to split the text into columns. Finally, click the "OCR" button.

The recognized text will show in the text box below. You can download the text in TXT, Word, or PDF format.

Convertio

Convertio is a free online OCR service with a modern and attractive design. Free, non-registered users can process a maximum of 10 pages. These can be PDF or Word files. You can also use a scanned PDF file. If you need to recognize more pages, simply sign up to obtain improved service.

To perform OCR online with Convertio, just follow these three steps.

Step 1. Click "Choose Files" to choose and upload files from your local device, Google Drive, Dropbox, or web pages. You can also add files by dragging them onto the page.

Convertio

Step 2. Choose one or two languages used in your uploaded file. Then, set the output format to Word document, Excel workbook, PDF document, text file, or whatever you require. You can choose to recognize all pages or just certain pages by entering a page range in the "Page Number" box.

Convertio OCR Settings

Step 3. When the recognition and conversion are completed, a download link for the extracted text in a converted document will appear at the top. Simply save it to your desired location.

Downloading Files from Convertio

Convertio offers the most options as an OCR online service and is thus the best free online OCR software.

IronOCR

IronOCR is a popular OCR technology library for .NET developers needing to extract text from scanned documents or PDF files. It provides high accuracy, fast processing, and solid performance in real-time for imaging, digitizing, and recognition. The library is a software component that simplifies the digitization of documents by automating document scanning. It also supports other processes including document indexing and image processing.

IronOCR is unique in its ability to automatically detect and extract data from imperfectly scanned images and documents. The IronTesseract Class provides the most advanced build of Tesseract known anywhere and on any platform, with increased speed and accuracy.

Let's take a look at a code sample for extracting text from a scanned image file.

// Import the necessary IronOCR namespace
using IronOcr;

// Create an instance of the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput())
{
    // Load the image file to perform OCR
    Input.AddImage("test-files/redacted-employmentapp.png");

    // Perform OCR to extract text from the image(s)
    var Result = Ocr.Read(Input);

    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

// Import the necessary IronOCR namespace
using IronOcr;

// Create an instance of the IronTesseract class
var Ocr = new IronTesseract();

using (var Input = new OcrInput())
{
    // Load the image file to perform OCR
    Input.AddImage("test-files/redacted-employmentapp.png");

    // Perform OCR to extract text from the image(s)
    var Result = Ocr.Read(Input);

    // Output the extracted text to the console
    Console.WriteLine(Result.Text);
}

' Import the necessary IronOCR namespace
Imports IronOcr

' Create an instance of the IronTesseract class
Private Ocr = New IronTesseract()

Using Input = New OcrInput()
	' Load the image file to perform OCR
	Input.AddImage("test-files/redacted-employmentapp.png")

	' Perform OCR to extract text from the image(s)
	Dim Result = Ocr.Read(Input)

	' Output the extracted text to the console
	Console.WriteLine(Result.Text)
End Using

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Input Image to Extract Text

Redacted Employee Data

Extracted Text Output

The output is clean and matches the original image with just a few lines of code, translating to perfect output and no technical issues.

Image Output