The Problem: Stacks of Paper, No Digital Text

You've just returned from a business trip with a handful of receipts. Or maybe you've scanned a pile of invoices. The information is locked inside images — and you need it as editable, searchable text. Manually typing everything is tedious and error-prone.

The traditional solution is to install desktop OCR software or upload your files to a cloud service. But what if you don't want to install anything, and you don't want to upload confidential financial documents to a random website?

The Solution: Browser-Based On-Device OCR

Modern browsers can now run powerful OCR engines directly on your device, thanks to WebAssembly — a technology that lets browsers execute complex software at near-native speed. This means you can extract text from images without installing anything and without uploading your files.

Step-by-Step Guide

Step 1: Open the OCR Tool

Navigate to PrivateOCR's text extractor. There's no account to create, no software to install — it works right in your browser.

Step 2: Select Your Language

If your receipt is in a language other than English, select the appropriate language from the dropdown menu. PrivateOCR supports 15+ languages including German, French, Spanish, Japanese, Chinese, and Arabic.

Step 3: Drop Your Image

You have two options:

  • Drag and drop your image file directly onto the drop zone
  • Click the drop zone to open a file browser and select your image

Supported formats include JPEG, PNG, BMP, WebP, and TIFF.

Step 4: Extract Text

Click the "Extract Text" button. You'll see a progress bar as the OCR engine processes your image. This typically takes 3–15 seconds depending on the image size and complexity.

Step 5: Copy or Download

Once extraction is complete, you'll see the text in a text area below. You can:

  • Copy to clipboard with one click
  • Download as a .txt file for your records

Tips for Better OCR Results

OCR accuracy depends heavily on the quality of your input image. Here are tips for the best results:

Image Quality

  • Resolution: Use at least 300 DPI when scanning. Higher resolution means more detail for the OCR engine.
  • Contrast: Dark text on a light background works best. Avoid scanning receipts with faded ink.
  • Alignment: Try to keep the text straight. Heavily skewed text is harder to recognize.

Lighting (for Phone Photos)

  • Use even, diffused lighting — avoid harsh shadows
  • Photograph from directly above to minimize perspective distortion
  • Make sure the entire receipt is in focus

File Size

There's no file size limit with on-device OCR, but very large images (10MB+) may take longer to process. For most receipts and documents, images under 5MB work perfectly.

Common Use Cases

  • Expense reports: Extract vendor names, dates, and amounts from receipts
  • Invoice processing: Digitize paper invoices for bookkeeping
  • Business cards: Capture contact information from scanned cards
  • Old documents: Digitize archived paperwork for searchability
  • Screenshots: Extract text from images shared in chat or email

Why On-Device Processing Matters for Receipts

Receipts often contain sensitive information: credit card numbers, purchase details, and personal spending patterns. By using an on-device OCR tool, you ensure this data never leaves your computer — no cloud servers, no data leaks, no privacy concerns.