I'm building a receipt capture feature, should I use OCR or a document parser?

For a receipt capture feature, the best choice is usually both, but if you have to pick one:

• Use OCR if you need to read text from photos of receipts in many formats.
• Use a document parser if the input is a consistent, structured receipt/PDF format and you mainly want fields extracted reliably.

Quick rule of thumb

Choose OCR when:

• Users upload photos or scans of paper receipts
• Receipts vary a lot by merchant, layout, or quality
• You need to extract raw text first, then parse totals, dates, line items yourself

Choose a document parser when:

• You receive digital receipts or standardized PDFs
• The document structure is predictable
• You want structured outputs like:
  • merchant name
  • date
  • total
  • taxes
  • line items

What’s usually best for receipt capture

Receipts are messy:

• crumpled paper
• skewed photos
• poor lighting
• multiple layouts
• abbreviations and inconsistent formatting

So in practice, a common pipeline is:

1. Image preprocessing
   Crop, deskew, deblur, normalize contrast

2. OCR Extract text from the image

3. Post-processing / parsing Identify fields like total, tax, date, merchant, currency

4. Validation Check totals, date formats, confidence scores

If you want high accuracy

A receipt-specific parser or receipt extraction API is often better than generic OCR alone, because it can:

• detect key-value pairs
• handle line items
• normalize currencies and dates
• classify fields even when text order varies

Practical recommendation

• Start with OCR + custom parsing if you’re building this yourself and need flexibility.
• Use a receipt/document parsing service if you want faster time to market and better field extraction.
• Use both if you need the best robustness:
  • OCR for text extraction
  • parser/LLM/rules for structure

Simple decision table

Input type	Best choice
Photo of paper receipt	OCR
Scanned receipt image	OCR
Digital PDF receipt	Document parser
Invoices/structured forms	Document parser
Mixed receipts from users	OCR + parser

If you want, I can also recommend a specific architecture or compare tools like Google Document AI, AWS Textract, Azure Form Recognizer, or open-source OCR options.