How to Turn a Scanned PDF into Editable Text

What is the difference between a digital PDF and a scanned PDF?

A digital PDF contains real text characters, while a scanned PDF contains only images of pages. Digital PDFs are created by software, for example when a document is saved or exported as PDF from Word. Scanned PDFs come from a scanner or a phone scanning app that photographs each page.

The difference matters because only real characters can be copied, searched and edited. A scanned page may look exactly like text, but to the computer it is a picture made of pixels.

You can usually tell which one you have in a few seconds:

• Try to select a word. In a digital PDF you can highlight individual words. In a scanned PDF the cursor selects nothing, or selects the whole page as an image.
• Search for a word you can see. If the PDF viewer's search finds nothing, the page probably has no text layer.
• Zoom in closely. Digital text stays sharp at any zoom level; scanned text becomes blurry or pixelated.

Some scanners and apps already run OCR and add a hidden text layer, creating a searchable PDF. If you can select text in a scan, that text layer exists, although its accuracy varies.

What is OCR and how does it work?

OCR, or optical character recognition, is software that converts images of text into actual characters. It analyzes the shapes on a page, recognizes letters and words, and outputs text that can be edited.

OCR engines use language data to recognize characters and words, which is why choosing the document's language matters. Recognition is never guaranteed to be exact: smudges, low resolution, unusual fonts and skewed pages all cause mistakes, so the output should be proofread.

Novaxera uses Tesseract, a widely used open-source OCR engine, on its servers. Files are uploaded over an encrypted HTTPS connection; the upload is deleted when processing finishes and the result within 60 minutes. The security page explains file handling in more detail.

How do you convert a scanned PDF to text with Novaxera?

Upload the PDF, choose the language, and download the text file. The PDF to Text converter and the Image to Text (OCR) tool use the same process; Image to Text also accepts single images such as JPG, PNG, WebP, BMP, TIFF and GIF.

1. Open PDF to Text (or Image to Text) in any modern browser on a computer or phone. No account is needed.
2. Upload one PDF of up to 50 MB. Multi-page scanned PDFs are supported.
3. Choose the language of the document: English, Arabic, French, German, Spanish, Italian, Portuguese, Russian, Chinese (Simplified) or Japanese. One language is used per run.
4. Start the recognition. Each page is rendered as an image at about 144 DPI and read by Tesseract.
5. Download the UTF-8 .txt file. The text of each page begins with a separator line such as “--- Page 1 ---”, so you can see where each page starts.

For Arabic documents, the Arabic OCR page has the language preset to Arabic. Download the result promptly, since it is deleted automatically within 60 minutes.

How can you get more accurate OCR results?

The quality of the scan has the biggest effect on OCR accuracy. A few habits make a clear difference.

• Scan at a good resolution. 300 DPI is a common recommendation for scanning text documents. Very low-resolution scans blur small letters together.
• Keep pages straight. Place pages squarely on the scanner glass, and rotate sideways or upside-down pages before OCR. Rotate PDF can turn pages 90° or 180°.
• Use strong contrast. Dark text on a plain white background works well. Avoid shadows, colored paper, faint photocopies and glare from phone cameras.
• Choose the right language. Tesseract uses the selected language's data, so French text read as English, for example, produces more errors with accented characters.
• Remove pages you do not need. Cover pages or blank pages only add noise; Delete PDF Pages removes them first.

Even with a clean scan, read through the result and correct mistakes, especially in numbers, names and addresses.

What are the limits of OCR?

OCR recovers the words on a page, not the page itself. Plan for these limits before you start.

• Formatting is not kept. Novaxera's output is plain text: no fonts, bold, columns, tables or images.
• Handwriting is not reliably recognized. OCR works on printed text; handwritten notes and signatures usually come out wrong or missing.
• One language per run. In a document that mixes two languages, text in the language you did not select may be recognized poorly.
• Complex layouts can mix up reading order. Multi-column pages, forms and tables may produce text in an unexpected order.
• Poor scans give poor text. Blurry, skewed or low-contrast pages lead to more errors, and the result always needs proofreading.

How do you get the OCR text into Word?

Open the .txt file, copy the text, and paste it into a Word document. Word, Google Docs and LibreOffice Writer can all receive pasted text, and Word can also open .txt files directly.

After pasting, delete the “--- Page N ---” separator lines if you do not need them, then fix line breaks, add headings and restore bold or lists by hand. The text is UTF-8, so Arabic, Russian, Chinese and Japanese characters are kept.

Use PDF to Word instead when the PDF is digital. PDF to Word rebuilds paragraphs, fonts, tables, images and page layout from the PDF's existing text layer and gives you an editable .docx file. It does not perform OCR, so a scanned PDF converted with PDF to Word will not contain editable text. In short: scanned PDF, use OCR; digital PDF, use PDF to Word.