What Is OCR Scanning?
If you've been researching document scanners, you've probably come across the term OCR. While every scanner can create a digital image of a document, OCR scanning goes one step further by making the text inside that document searchable and editable.
Whether you're digitising invoices, receipts, contracts or personal paperwork, OCR can transform how you organise and find your documents.
In this guide, we'll explain what OCR scanning is, how it works and why it's one of the most useful features to look for when buying a document scanner.
If you're looking for a scanner that supports OCR, read our Best Document Scanners with OCR UK guide.
What Does OCR Stand For?
OCR stands for Optical Character Recognition.
It is a technology that analyses printed text within a scanned document or image and converts it into machine-readable text. Instead of saving only a picture of the page, OCR creates an invisible layer of text that computers can search, copy and index.
For example, if you scan an electricity bill, OCR can recognise words such as your supplier's name, account number and payment amount. You can then search for those details later without opening every file manually.
How Does OCR Work?
Although the technology behind OCR is sophisticated, the process is straightforward from a user's perspective.
- Place the document into your scanner.
- The scanner captures a high-quality digital image.
- OCR software analyses each character on the page.
- The recognised text is converted into searchable data.
- The finished document is saved as a searchable PDF or another compatible format.
The original appearance of the document remains unchanged, but your computer can now recognise the words contained within it.
OCR vs Standard Scanning
| Standard Scan | OCR Scan |
|---|---|
| Creates an image of the document | Creates an image plus searchable text |
| Cannot search the contents | Search by keywords or phrases |
| Cannot easily copy text | Text can often be copied or exported |
| Suitable for simple archiving | Ideal for digital document management |
Why Is OCR Useful?
OCR saves time whenever you need to find information stored in scanned documents.
Instead of browsing dozens or even hundreds of files, you can simply search for:
- Invoice numbers
- Customer names
- Company names
- Policy numbers
- Addresses
- Dates
- Reference numbers
This makes OCR particularly valuable for businesses and anyone creating a paperless office.
Common Uses for OCR
OCR technology is used in many different situations, including:
- Digitising paper records.
- Creating searchable PDF archives.
- Scanning receipts for expense claims.
- Archiving invoices.
- Managing legal documents.
- Storing medical records.
- Organising household paperwork.
- Scanning business cards.
Whether you're self-employed or simply organising your home office, OCR can make document management significantly easier.
Can OCR Recognise Handwriting?
OCR performs best with clearly printed text.
Handwriting is much more difficult to recognise because writing styles vary from person to person. While some specialist applications offer handwriting recognition, standard OCR software is generally designed for printed documents.
If you regularly scan handwritten notes, expect recognition accuracy to be lower than with printed paperwork.
Does OCR Work on Old Documents?
Usually yes, although accuracy depends on the quality of the original document.
OCR generally works best when documents are:
- Clean and undamaged.
- Scanned at around 300 dpi.
- Clearly printed.
- Properly aligned.
Faded text, creases and poor print quality can reduce recognition accuracy.
Which File Formats Support OCR?
OCR is most commonly used with PDF documents, but many scanning applications also support exporting recognised text to:
- Microsoft Word
- Excel
- Plain text files
- Rich Text Format (RTF)
Searchable PDF remains the preferred option for most users because it preserves the original appearance while adding searchable text.
Recommended OCR Document Scanners
If OCR is important to you, these scanners are excellent choices:
ScanSnap iX2500
Our top recommendation thanks to its excellent OCR software, fast scanning speeds and large automatic document feeder.
Epson WorkForce ES-500W II
An excellent value scanner offering reliable OCR, wireless connectivity and high-quality document management software.
Brother ADS-1800W
A compact wireless scanner that's ideal for home offices and small businesses needing searchable document archives.
See our complete Best Document Scanners with OCR UK guide for more recommendations.
Tips for Better OCR Accuracy
- Scan at 300 dpi.
- Keep documents flat and clean.
- Enable automatic deskew and rotation.
- Remove staples and folded corners.
- Use colour or grayscale for poor-quality originals.
- Check the OCR language matches the document language.
Small improvements in scan quality can significantly improve text recognition.
Is OCR Worth Having?
For most people, absolutely.
If you only scan a handful of documents each year, OCR may not seem essential. However, anyone who regularly scans receipts, invoices, contracts or business paperwork will quickly appreciate how much easier searchable documents are to organise.
The ability to locate files instantly using a simple keyword search can save hours over the lifetime of your document archive.
Frequently Asked Questions
Do all scanners include OCR?
No. Many dedicated document scanners include OCR software, but some basic scanners only create image-based files.
Is OCR accurate?
Modern OCR software is generally very accurate when scanning clean, printed documents at an appropriate resolution.
Can OCR recognise handwriting?
Standard OCR software is designed primarily for printed text. Handwriting recognition is possible with some specialist applications but is generally less reliable.
Does OCR make PDF files larger?
Only slightly. The searchable text layer usually adds very little to the overall file size.
Can I use OCR on existing scanned PDFs?
Yes. Many OCR applications can process image-only PDFs and convert them into searchable documents after they have been scanned.