Document Crop Tool
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Supports: JPEG, PNG, WEBP, HEIC
Upload a document photo to crop
Professional Document Scanner & Crop Tool
Transform photos of documents into professional scanned images with our advanced online document crop tool. Featuring automatic corner detection, perspective correction, and multiple color modes, it's perfect for digitizing receipts, contracts, notes, business cards, and any paper documents using your smartphone or camera.
How to Use the Document Crop Tool
- Upload Document Photo: Drag and drop your document photo or click "Upload Photo" to select from your device
- Auto Detection: Our Harris corner detection algorithm automatically identifies document edges and corners
- Adjust Corners: Drag the corner markers for precise positioning - zoom in for pixel-perfect accuracy
- Choose Output Mode: Select Color for original look, Black & White for text documents, or High Contrast for enhanced readability
- Preview & Verify: Use zoom controls to inspect details before finalizing
- Download: Save your cropped and corrected document in high quality
Supported File Formats
- JPEG/JPG - Most common photo format from cameras and phones
- PNG - High quality format with transparency support
- WEBP - Modern web format with superior compression
- HEIC - iPhone photos (automatically converted to JPEG)
- GIF - Simple graphics and document scans
Key Features
Intelligent Corner Detection
Advanced Harris corner detection algorithm automatically identifies document boundaries with high accuracy. Analyzes edge patterns and intensity changes to locate all four corners instantly, saving time and effort.
Perspective Correction
Sophisticated perspective transformation technology straightens angled photos automatically. Converts distorted trapezoid shapes into perfect rectangles, creating professional scanner-quality results from any angle.
Precision Manual Adjustment
Full manual control with draggable corner markers for pixel-perfect positioning. Fine-tune automatic detection results or manually set corners for challenging documents with poor contrast or complex backgrounds.
Advanced Color Modes
Three optimized output modes: Color preserves original appearance, Black & White reduces file size and improves text clarity, High Contrast enhances readability of faded documents and improves OCR accuracy.
Zoom & Magnifier Tools
Professional-grade zoom controls with up to 3x magnification and interactive magnifier lens. Inspect details, verify text legibility, and position corners with surgical precision for perfect document captures.
Real-Time Adjustments
Fine-tune brightness and contrast with live preview controls. Enhance text visibility, remove shadows, and optimize document appearance before downloading for superior scan quality.
100% Private & Secure
All processing happens locally in your browser using client-side JavaScript. Zero server uploads means your sensitive documents remain completely private and never stored or transmitted online.
Cross-Device Compatible
Fully responsive design optimized for all devices. Scan documents on-the-go with your smartphone, tablet, or desktop computer. Touch-friendly controls and mobile-optimized interface for seamless mobile scanning.
High-Quality Output
Download cropped documents in original resolution with premium JPEG quality settings. Maintains clarity and detail while optimizing file size for easy sharing, archiving, and professional presentation.
Universal Format Support
Supports all major image formats including JPEG, PNG, WEBP, GIF, and HEIC. Automatically converts iPhone HEIC photos to JPEG for seamless cross-platform compatibility and easy document sharing.
Lightning-Fast Processing
Instant corner detection and real-time preview with no waiting. Optimized algorithms and efficient rendering ensure smooth performance even on mobile devices with large document images.
Drag & Drop Upload
Effortless file upload with drag-and-drop support. Simply drag document photos directly into the browser or click to browse. Multiple upload methods for maximum convenience and workflow efficiency.
Document Types & Use Cases
Business Documents
Scan contracts, invoices, legal papers, business cards, and official correspondence with professional quality.
Receipts & Invoices
Digitize receipts, bills, and expense reports for accounting and record-keeping purposes.
Educational Materials
Scan notes, worksheets, homework, textbook pages, and study materials for digital archives.
ID Documents
Create clean scans of identification cards, passports, licenses, and official certificates.
Pro Scanning Tips
- Good Lighting: Use even, natural light or overhead lighting to avoid shadows and glare
- Flat Surface: Place documents on a flat surface for best automatic detection results
- Manual Fine-Tuning: Use magnifier mode when adjusting corners for pixel-perfect accuracy
- High Contrast Mode: Perfect for text-heavy documents and improving readability of faded papers
- iPhone Support: HEIC photos from iPhones are automatically converted for seamless scanning
- Zoom to Verify: Always zoom in to check edges and text clarity before downloading
Frequently Asked Questions
Are my documents safe and private?
Absolutely! All document processing happens locally in your browser using JavaScript. Your documents are never uploaded to our servers or stored anywhere online. Everything happens on your device, ensuring complete privacy and security for sensitive documents.
How does automatic corner detection work?
Our tool uses the Harris corner detection algorithm, a computer vision technique that identifies sharp edges and corners in images. It analyzes intensity changes in your photo to automatically locate the four corners of your document. You can then fine-tune these positions manually for perfect accuracy.
What's the difference between the color modes?
Color Mode: Preserves original colors - ideal for documents with colored elements, diagrams, or photos. Black & White: Converts to grayscale - perfect for text documents and reducing file size. High Contrast: Enhances text readability by increasing contrast - excellent for faded documents or improving OCR accuracy.
Can I scan documents from my phone?
Yes! This tool is fully optimized for mobile devices. Simply take a photo of your document using your phone's camera, then upload it to the tool. iPhone users can upload HEIC photos directly - they'll be automatically converted to JPEG format for processing.
What if automatic detection doesn't find the corners correctly?
No problem! You can manually adjust all four corner markers by dragging them to the correct positions. Use the zoom and magnifier features to precisely position corners. The auto-detection provides a starting point, but manual adjustment ensures perfect results even with challenging photos.
Does this tool correct perspective distortion?
Yes! The tool applies perspective transformation to correct distortion from angled photos. When you crop a document, it automatically adjusts the perspective to create a flat, rectangular output, as if the document was scanned from directly above. This makes documents look professional and easier to read.
What's the maximum document size I can scan?
The tool can process images of any reasonable size. Very large images (over 50MB) may take longer depending on your device. For best performance, we recommend photos under 20MB. Modern smartphone photos (typically 2-8MB) work perfectly and provide excellent scan quality.
Can I use this to create PDFs?
This tool outputs scanned documents as high-quality JPEG images. You can easily convert these images to PDF using various free online tools or built-in features in most operating systems. The cropped and corrected images are optimized for PDF conversion and document archiving.
How do I get the best scan quality?
For optimal results: 1) Use good, even lighting without shadows or glare. 2) Place the document flat on a contrasting surface. 3) Take the photo from directly above when possible. 4) Ensure the document fills most of the frame. 5) Use your phone's highest quality camera setting. 6) Fine-tune corner positions using the magnifier for pixel-perfect accuracy.