OCR PDF online — instructions
- Add the PDF file — drag the document into the upload area or click to choose a file from your device.
- Choose the OCR language — select the language used in the document.
- Choose the OCR result — select “Searchable PDF” or “Text TXT”.
- Click “Run OCR” and wait for the text recognition to finish.
- Save the resulting file to your device after processing is complete.
OCR PDF online for text recognition in scanned documents
When a PDF is created from scanned pages, photographs, or images containing text, the content may look perfectly readable on the screen while still being unavailable for selection, copying, or search. In this case, OCR PDF can recognize letters, numbers, and words on the page and convert them into machine-readable text.
With Konvertus, you can use OCR PDF online, choose the document language, and save the result in the format you need. The tool provides two output options: a searchable PDF and a TXT text file.
This is useful for scanned contracts, invoices, certificates, books, study materials, forms, archived documents, and other files where the text is stored as part of an image. After processing, you can recognize text in PDF and either search through the document or save the recognized content separately as text.
How to recognize text in PDF with OCR
To start text recognition, add the PDF file and select the language used in the document.
Choosing the correct language helps the OCR system identify letters, words, punctuation marks, and language-specific characters more accurately. For an English document, select English. For a German document, choose German, and use the corresponding option for other languages.
The OCR language list includes many options, such as:
- English;
- German;
- French;
- Spanish;
- Portuguese;
- Russian;
- Italian;
- Polish;
- Ukrainian;
- Dutch;
- Turkish;
- Greek;
- Japanese;
- Korean;
- Chinese and other languages.
Next, choose the OCR result:
- Searchable PDF;
- Text TXT.
If you want to keep the document in PDF format and search for recognized words inside it, choose Searchable PDF. If you only need the recognized text, select TXT.
Then click “Run OCR” and wait until processing is complete.
PDF text recognition for scanned documents
A scanned document often consists entirely of page images. To a person, the content looks like ordinary text, but to a computer each page may simply be a picture.
Because of this, you may not be able to select a sentence, copy a paragraph, or search for a specific word.
PDF text recognition analyzes the characters visible in those images and converts them into text that software can work with.
This can be useful when you need to:
- find a name in a long document;
- locate a contract number;
- search for a word in a scanned book;
- get text from a certificate;
- work with older archived documents;
- make scanned files easier to search.
For PDFs with many pages, searchable text can make finding the required information much faster.
OCR a PDF and create a searchable document
One of the available output formats is a searchable PDF.
This option is useful when you want to keep the file as a PDF but also need to find recognized words with the search function.
For example, an archived document may contain dozens of scanned pages. Without OCR, finding one specific word may require checking every page manually. After you OCR a PDF, recognized text can be found using the search function in a compatible PDF viewer.
A searchable PDF can be useful for:
- contracts;
- reports;
- manuals;
- scanned books;
- administrative documents;
- archives;
- study materials;
- forms.
The document remains a PDF while the recognized text becomes available for search.
OCR PDF free directly in the browser
You do not need to install a separate desktop program just to recognize text from a few scanned pages.
With Konvertus, you can use OCR PDF free directly in the browser. Add the document, choose the language, select the required output, and start text recognition.
The tool can be used to:
- run OCR PDF online;
- recognize scanned documents;
- create a searchable PDF;
- get text from scanned pages;
- save recognized content as TXT;
- process documents in different languages.
When processing is complete, the resulting file can be saved to your device.
Convert PDF to text OCR and save as TXT
Keeping the original page appearance is not always necessary. Sometimes the main goal is to obtain the words contained in the scanned document.
For this purpose, select “Text TXT”.
The PDF to text OCR option recognizes textual content from scanned pages and saves it in a separate text file.
TXT can be useful when you want to:
- copy the content into a text editor;
- use the text for notes;
- store only the recognized words;
- send the text separately from the original PDF;
- continue working with the content in another program.
A TXT file does not preserve the visual appearance of the PDF in the same way. Images, fonts, exact element positions, and page layout are not retained as they are in the source document.
Choose TXT when the text itself is more important than the original page design.
How to choose the language for PDF OCR
Before starting PDF OCR, select the language used in most of the document.
This helps the recognition system distinguish letters, accents, and other specific characters correctly.
For example:
- choose English for an English document;
- choose Spanish for a Spanish document;
- choose French for a French document;
- choose German for a German document;
- choose Portuguese for a Portuguese document.
Many other languages are available as well.
The correct language choice is especially important for accented characters, special symbols, and different alphabets. Before starting recognition, check that the selected language matches the main content of the file.
How to recognize a scanned PDF
To recognize a scanned PDF, you do not need to extract pages manually or convert the document to JPG, PNG, or another image format first.
You can add the PDF file directly to the tool.
The process is simple:
- add the PDF;
- select the OCR language;
- choose Searchable PDF or TXT;
- run OCR;
- save the result.
This method is suitable for documents whose pages contain images of printed text and where words cannot normally be selected.
When to use OCR text recognition PDF
Not every PDF needs OCR.
If you can already select a sentence, copy text, and search for words in the document, the PDF probably already contains machine-readable text.
In that case, additional OCR text recognition PDF is usually unnecessary.
OCR is especially useful for files created from:
- scanned paper documents;
- photographed pages;
- images saved as PDF;
- old digital archives;
- electronic copies of printed materials.
A simple way to check is to try selecting a sentence or searching for a word that is clearly visible on the page.
If the text cannot be selected and search does not find the word, OCR may be useful.
What affects PDF OCR accuracy
Recognition quality depends heavily on the source document.
Sharp pages with good contrast and properly aligned text are generally easier to recognize than blurry or distorted scans.
Several factors can reduce accuracy:
- low resolution;
- blurred pages;
- shadows;
- stains;
- very small text;
- unusual fonts;
- strongly tilted pages;
- damaged characters;
- handwriting;
- incorrect OCR language.
If you have several versions of the same document, use the clearest one available.
For important files, it is a good idea to review the recognized text afterward, especially names, dates, amounts, numbers, and other information that must remain exact.
Create a searchable PDF with OCR
Search is especially useful when a PDF contains many pages.
Imagine a scanned contract with 80 pages. If every page is only an image, locating one clause may require checking most of the document manually.
With OCR, the words on the pages can be recognized and used to create a searchable PDF.
This type of result is useful for:
- long contracts;
- scanned books;
- reports;
- administrative archives;
- technical documentation;
- manuals;
- educational materials.
If you want to keep the file in PDF format and add text search, choose Searchable PDF as the OCR result.
OCR PDF file without converting pages first
To process an OCR PDF file, you do not need to convert every page to a separate image before starting.
The PDF can be added directly to the tool.
This avoids unnecessary steps and lets you work with the original document. After adding the file, select the language and the output format you want.
When processing is finished, save the generated file to your device.
This is especially convenient for multi-page documents because there is no need to handle each page separately.
Extract text from a scanned PDF
In some tasks, keeping the document as a PDF after recognition is not necessary. The main goal may simply be to obtain the text contained on the pages.
In this case, select TXT to extract text from PDF OCR and save the recognized content as a text file.
You can then open the file in a text editor or use the content in another application.
Keep in mind that TXT is intended for text, not for reproducing the exact page design. The visual structure, images, fonts, and layout of the original PDF are not preserved in the same way.
OCR PDF for documents in different languages
The language selector makes the tool suitable for files from different countries.
You can use OCR PDF online with documents in English, Spanish, French, German, Portuguese, Russian, and many other supported languages.
Simply choose the language that matches the main content before starting recognition.
You can then independently choose whether the result should be a searchable PDF or TXT.
This makes it possible to use the same OCR tool for documents in different languages without changing the basic workflow.
Make a PDF searchable with OCR
A PDF with many pages is much easier to use when words can be found with search.
If the pages contain only images, normal search may not work.
OCR can make a PDF searchable by recognizing visible characters and making that text available to the document search function.
This is especially useful for:
- archived records;
- scanned agreements;
- books;
- technical documents;
- reports;
- study materials;
- administrative files.
If you only need the recognized text and not the PDF itself, TXT can be selected instead.
OCR PDF online and confidentiality
Scanned documents may contain personal, work-related, financial, or other confidential information.
With Konvertus, processing is performed directly in the browser, without uploading to the server.
This allows you to use OCR PDF online while keeping the file on the device during processing.
After recognition is complete, the result can be saved to your device in the selected format.
Frequently asked questions
What is OCR PDF?
OCR PDF is optical character recognition applied to PDF pages that contain scanned documents or images of text.
How do I recognize text in PDF online?
Add the PDF file, choose the OCR language, select the output format, and click “Run OCR”.
Can I make a scanned PDF searchable?
Yes. Choose “Searchable PDF” to save a document with recognized text that can be found using search.
Can I convert PDF to text OCR?
Yes. Choose “Text TXT” to save the recognized content as a text file.
Which OCR language should I choose?
Select the language used in most of the document. This helps the system recognize letters, words, and special characters more accurately.
Can I use OCR PDF free?
Yes. The tool allows you to use OCR PDF online for free in the browser.
Why does OCR sometimes recognize words incorrectly?
Accuracy depends on scan quality, resolution, contrast, page angle, font, and the selected language.
Do I need OCR if my PDF already contains selectable text?
Usually not. If the text can already be selected, copied, and searched, additional OCR is generally unnecessary.
Which should I choose: Searchable PDF or TXT?
Choose Searchable PDF if you want to keep the document as a PDF and add search. Choose TXT if you only need the recognized text.
Is the PDF uploaded to a server?
No. Processing is performed directly in the browser, without uploading to the server.