OCR Preprocessor
Boost Recognition

This is NOT an OCR tool. It is a specialized sub-tool that cleans images to significantly improve the accuracy of any OCR software you use later.

Core Concept

Can I extract text with this?

No, this tool handles the **pre-OCR stage.** Use it to clean up poorly scanned documents (enhance contrast, remove noise) before feeding them into an OCR engine for better results.

Efficiency

Why use a preprocessor?

Even expensive OCR software makes mistakes with low-quality images. This sub-tool quickly prepares images to be **OCR-ready**, saving you hours of manual editing and error correction later.

Features

What enhancements are available?

- **Binarization**: Strips the background to highlight text in pure black.
- **Grayscale**: Removes color noise for cleaner scanning.
- **Contrast Adjustment**: Makes faint text sharp and readable.

Security

Is it safe for private documents?

**Absolutely.** Like all Max-PDF tools, this processes everything **locally in your browser.** No files are sent to a server, ensuring 100% privacy for your sensitive documents.

Workflow

How do I use the output?

Save the optimized images as a PDF. Then, upload it to Google Drive OCR or any professional software. You’ll notice a significant drop in errors compared to the original file.

Reference

Can it fix completely unreadable photos?

It improves image quality, but it can't reconstruct text that is physically gone. It's most effective for **dark, low-contrast, or colorful scans** that confuse standard OCR engines.