Before You Read
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OCR (Optical Character Recognition) has been a hot topic among AI enthusiasts and many people are seeking tools to solve the trouble of editing scanned PDF and image files. Here, we understand the hassle you have to go through in looking for the right OCR tool to get the most accurate result with the simplest way with just a few clicks. It is more difficult when coming to find the best Thai OCR tool as not every OCR tool supports Thai language.
So in this quick guide, we plan to ease your troubles and help you decide what works best for you; worry not, we have done the time-consuming part and narrowed down the 5 Best Thai OCR Tools. All you have to do is check these 5 tools and pick one that meets your needs!
Part 1. 5 Best Thai OCR Tools
1. UPDF - The Most Powerful Thai OCR Software
We know for a fact that all of us yearn for that perfect tool to solve the efficiency + accuracy question when using one Thai OCR software. UPDF is the ultimate answer.
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It is a powerful Thai OCR tool. Its OCR feature processes all sorts of scanned PDF/image in 38 languages with at least 99% of accuracy. If your document contains other languages in addition to Thai, you can also select multiple languages in the OCR language options based on what your document includes. There’s no need to switch software or repeat the process multiple times—UPDF can accurately recognize all the languages in your multilingual document in one go. Just customize the settings for the OCR which can promise you to get the desired contents. You can also edit, translate, summarize, convert, and take full control of how you want your Thai content after performing OCR.

The most important thing you should know is that UPDF can help you retain the format when performing OCR and converting the scanned PDF or images to desired formats. The good part is that you can use this feature on Windows, macOS, iOS, and Android platforms. So, go ahead, click this link to download UPDF for all devices and experience the power of UPDF now. Then, open your Thai document with UPDF, click on the "OCR" in "Tools" on desktop or tap "OCR" in the bottom menu bar on mobile, and make sure to select the Thai language in the Document Language part so that you can get accurate result. Then, click on the "Convert" on desktop or hit the "Done" button to make your Thai document editable.

At this point, you might have more questions: If I have multiple Thai scanned files that need OCR, do I really have to repeat the same operation over and over again? Is there a faster method? The answer is yes! UPDF understands that users may want to process multiple documents at once, so it includes a Batch OCR option in the batch processing panel. Simply add all the Thai documents you want to recognize, follow the instructions shown in the UPDF interface, and you can complete OCR on multiple Thai scanned files very quickly. Convenient, right?

For some users, you may try a lot of times, but cannot get accurate results as your document may have some special elements and you only need to extract these thai contents, no worry, you can use UPDF AI to extract Thai contents from the files directly. Just click on the "UPDF AI", go to "Chat", click on the "Screenshot", and draw to select the Thai content you want to extract. enter the prompt "Extract the content from the image", and press enter. Now, you can copy them all to any place. If you need to perform OCR on documents written in languages beyond the 38 languages supported by UPDF, you can enter a prompt in UPDF AI and let it extract the text for you. UPDF AI supports languages worldwide.

If you don’t want to download the software, you can also use UPDF AI Online to recognize and extract text from your Thai scanned documents. UPDF AI Online also supports uploading scanned PDF files and images — you can enter commands to let UPDF AI Online recognize and extract the text inside. Extracting handwritten text is also supported by UPDF AI. The UPDF AI free plan includes 100 prompts. You can click the button below to try it out for free and let the AI extract Thai text from your document.

Other Key features:
After performing OCR on your file, you may want to make further edits. UPDF fully supports complete control over your document within the software. Below are some key features:
- Use sticky notes, highlighters, and text notes to help you engage with the document.
- Take full control of editing texts, images and links within the PDF.
- In addition to batch OCR, UPDF also offers other powerful batch PDF features — including batch compression, conversion, creation, combination, batch watermarking, and more.
- Convert PDF from/to the popular formats like Word, Excel, PPT, etc.. In addition, you can also perform OCR during file format conversion. No more manual OCR steps.
- UPDF AI assistant to summarize, translate, explain, chat for the file per your needs.
Pros:
- Extremely fast to process the OCR feature.
- Supports OCR for multilingual documents.
- OCR can work offline.
- OCR feature will not mess up the original layout of your texts.
- Enables batch OCR for processing multiple files at once
- Offers multiple OCR modes, including Editable PDF, Text and Picture Only, and Searchable PDF Only.
- Extracts text from scans and images on mobile, desktop, and online.
- Delivers high OCR accuracy.
- Recognizes both printed and handwritten text.
Cons:
- Trial users can only view and experience OCRed contents without the option to copy, edit, and save.
Customer rating: 4.5/5 via G2
What Customers Say About UPDF OCR:
Senior Product Designer, Khurram A., from G2
"Finally, a PDF Editor That's Actually Easy and Pleasant to Use"
OCR Accuracy: 99% accuracy. But it may be a little different based on the files your use.
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Also Read: 5 Best Japanese OCR Software (Tested and Reviewed)
2. I2OCR
If quick and easy is what you need, I2OCR’s Thai OCR online tool may be the best choice for you. It supports over 100 languages. I2OCR not only supports OCR images but also PDF files.

What makes it the best Thai OCR online tool? You may ask. Believe it or not, I2OCR is completely free of charge with unlimited uploads! Meaning, no registration is required.
However, this software is not very convenient for users who need to perform OCR on multi-page documents, because text can only be extracted one page at a time, and extracting text from additional pages requires extra steps.

Key features:
- Allow you to upload image, PDF and enter direct link.
- You can export to txt, docx, PDF, searchable PDF and HTML files after performing OCR.
- Translate the OCRed contents with Google.
- Batch processing for OCR.
- Edit the OCRed contents with Google Docs.
Pros:
- Completely free of charge.
- Easy to access.
- Batch processing is supported.
- Supports almost all popular languages.
- The OCR recognition for Thai text—including its numerous characters, intricate vowel and tone markers above, below, and around consonants, and contextual character variations—is highly accurate.
- Files in i2OCR are secure, not shared, and auto-deleted after 30 minutes.
Cons:
- Too many ads and it is not clear where you should click.
- The results you get after OCR may not be in the same layout as the original PDF/image.
- i2OCR detects complex layouts, yet exports text only, with no formatting or images.
- Handwriting recognition has improved but is still less accurate than typewritten text.
- Batch i2OCR is available only with a paid plan.
- Text extraction is limited to one page at a time, even for multi-page documents.
Price: Free
Customer Rating: 2/5
OCR Accuracy: 50%
3. ABBYY
ABBYY is also a great Thai OCR software. Its OCR features allows you to select the area then start performing. So that you can only get the content you need. Moreover, ABBYY offers other features like editting, filling, organizing as well as comparing PDF documents before and after OCR is performed. Unlike many Thai OCR apps, ABBYY’s free trial (7 days) allows users to store up to 100 pages of OCRed content within the app, while making it simple to collaborate and share PDFs to other users. ABBYY supports 201 OCR languages.
In addition, ABBYY performs OCR and presents the file in a multi-panel interface, including page thumbnails, the current page view, extracted text, and a zoomed-in panel for detailed editing. It features a Verification window that highlights uncertain text for quick keyboard-based confirmation or correction, allowing fast and efficient editing of large documents.

Key features:
- Annotate and edit PDF.
- Collaborate and share PDF.
- Change image resolution for optimal OCR results within the application.
- Compare two versions of the same document and detecting differences.
Pros:
- Free trial includes keeping up to 100 OCRed pages saved in the software.
- Auto detects what resolution your image could be changed to for better results.
- Provides an effective and flexible way to extract text from anything visible in Windows.
- Capable of doing all sorts of edits to the PDF/image before OCR conversion.
- Can enhances low-quality scans with brightness/contrast adjustments, distortion correction, spot removal, page splitting, and more, for single pages or entire documents.
Cons:
- Registration required to access free trial.
- The software suffers from a complex initial setup and configuration, significant OCR issues that require manual revisions, software bugs, difficulty in customizing workflows, and a user interface that is less intuitive than modern platforms. — from Vipul P., G2
- Requires manual clean-ups after OCR is performed on PDF/image.
- May not detect certain Headings and outline markers when exported to PDF.
Price: US$69.3/year
Customer Rating: 4.5/5
OCR Accuracy: 97%
4. OCRSpace
OCRSpace is one of the best Thai OCR online tool available right now. Similar to I2OCR, OCRSpace offers free usage to unlimited uploads. This Thai OCR online tool also supports 30 languages including Thai Language.
OCRSpace even has its own Chrome/Firefox extension and an API guide for enthusiasts to explore and experiment with. With 2 different engines, this Thai OCR online tool consistently develops and updates its OCR capabilities by introducing new features and languages with each update.

Key features:
- Supports JPG, PNG, GIF and PDF uploads.
- 30 OCR languages are supported.
- Offers detail customization for different engines and features for API testing.
- PDF/image orientation detection and auto-rotation.
Pros:
- Free of charge. No registration needed.
- Fast processing time.
- Perfect playground for API and coding enthusiasts.
Cons:
- Files uploaded cannot exceed 5MB.
- OCRed texts may not follow the same layout and format as original PDF/image.
- No export function for other file format other than raw texts and searchable PDFs.
- Selecting a language for OCR requires first checking which engine supports it, or errors may occur (e.g., Thai only works with OCR Engine 2).
- OCR processing is rather slow.
- For uploaded PDFs, only the first page is shown in the preview, preventing comparison between the OCR results and the original document.
Price: free
Customer Rating: 3/5
OCR Accuracy: 80%
5. Convertio
Convertio works best with its file conversion capabilities. But let’s not forget about its Thai OCR online tool. It supports 10 different output format and 75 detectable languages with Thai language as one of them.
This free Thai OCR online is also relatively easy to use, with just 3 simple steps to retrieve the OCRed file. Convertio also offers the option for users to decide whether to OCR the entire document or just certain pages, which would come in handy when you want to save some time or only need a few pages from your PDF to be OCRed.

Key features:
- Popular choice for converting all sorts of documents, e.g. video, audio, image, document, etc.
- More than 10 output formats available, including PDF, TXT, DOCX, PPT, FB2 and more.
- 75 detectable languages for scanned PDF or images.
- Convert selected pages of the document instead of converting the entire document.
Pros:
- Keeps the original layout of the texts.
- Free OCR recognition for both registered and unregistered users.
- Users can control how many pages and which pages to convert.
- Relatively simple to use for casual users.
- Option to directly save converted files to Dropbox and Google Drive.
- You can save the converted files into your Dropbox and Google Drive.
Cons:
- The free plan allows OCR of up to 10 pages only, and continuing requires selecting a premium service. No refunds are issued for subscriptions once upgraded to premium.
- May users struggle with converting Thai language text as the downloaded file may not have text visible.
Price: free
Customer Rating: 4/5
OCR Accuracy: 88%
Part 2. Which Tool is The Best OCR for Thai Language
Finding a great Thai OCR tool that matches your working style is the key to achieving efficiency, and an impressive app that allows all users to put out their best work is UPDF. Its visually engaging interface, functional features, formidable accuracy especially in the Thai language and incredible affordability allows a distinct upper hand amongst other alternatives:
- Cross-platform Compatibility: Unlike other tools, UPDF offers seamless functionality across iOS, Android, Mac and Windows.
- High OCR Accuracy: With a 99% accuracy rate for Thai language OCR, UPDF outperforms other tools, providing reliable text recognition while preserving the original document's layout.
- Batch OCR: lets you process multiple documents at once, saving time and improving efficiency for large-scale text recognition.
- Customizable Cloud Storage: UPDF's cloud service is unique, enabling synchronization of PDF files across any device, a feature not commonly found in other OCR tools.
- Optimal Resolution Auto-Detection: This feature sets UPDF apart by automatically determining and setting the best resolution for OCR.
- Comprehensive Editing Control: UPDF grants users full control over editing their PDF documents, a level of flexibility not always available in other OCR tools.
- Versatile File Conversion: Documents can be converted to any format, providing flexibility that's unmatched by most other OCR applications.
- Multilingual Support: UPDF supports 38+ OCR languages. Supports OCR for multilingual documents.
- UPDF AI Assistant: A standout feature that can extract text from documents in any language, summarizes, translates, and explains OCRed content that enhances the overall document management experience.
- User-Friendly Interface: UPDF's interface is designed for ease of use, making it accessible to beginners and professionals alike.
- Offline Accessibility: The OCR feature is available without internet access.
While trial users for UPDF face certain limitations, this is a small problem when compared with the advanced features that UPDF offers. And the price annually for UPDF Pro is very cheap when considering its high customer satisfaction rating and powerful PDF features. You can download UPDF to test firstly and purchase UPDF Pro if you like it.
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Final Words
We hope this guide has served as a helpful recommendation for the best Thai OCR tools. If you still have not made a decision yet, you must give UPDF a try, it isn't just another tool; it's a productivity partner praised by those who value accuracy, inexpensiveness and speed. Download UPDF on all devices and experience true power.
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