Mobile Camera Document Scanner with Auto-Crop
Scan tilted paper documents with your phone camera. SizeSnap automatically detects the 4 corners, crops out the bedsheet or table background, corrects perspective distortion, and lets you add multiple pages to export a clean, watermark-free PDF.
Scan a Document
Use your phone camera to scan documents or upload a photo. Auto-detect edges, flatten perspective, and export as multi-page PDF.
How to Scan Paper Documents with Phone Camera Online
Snap or Upload
Tap "Open Camera" to take a live photo or "Upload Image" from your gallery.
Auto Edge Crop
Our vision algorithm finds paper corners and removes surrounding table or bedsheet area.
Add More Pages
Need multiple pages? Tap "+ Add Page" to scan page 2, 3, and so on.
Download PDF
Export all pages into a crisp, high-resolution PDF or ZIP archive instantly.
Why SizeSnap is the Best Free CamScanner Alternative
| Feature | SizeSnap Scanner | CamScanner App | Other Web Scanners |
|---|---|---|---|
| Watermark Free | ✓ 100% Clean (No Watermark) | ✗ Adds "Scanned with CamScanner" | Varies (Often watermarked) |
| Server Privacy | ✓ Zero Server Uploads (100% Local) | ✗ Uploads to China/Cloud servers | ✗ Uploaded to backend server |
| Account / Sign-Up | ✓ Not Required (Instant access) | Requires phone / email login | Often requires sign-up |
| Multi-Page PDF | ✓ Free up to 30 pages | Limited on free tier | Single page only |
| Auto Perspective Flattening | ✓ OpenCV.js Computer Vision | ✓ Supported | ✗ Manual crop only |
Common Document Scanning Use Cases
Government Exam & Job Applications
Scan 10th/12th marksheets, degree certificates, Aadhaar cards, caste certificates, and domicile documents directly from your bed or desk without visiting a cyber cafe.
College Notes & Assignment Submissions
Photograph handwritten notebook pages, align edges automatically, and compile a sequential multi-page PDF for LMS or classroom uploads.
Bills, Invoices & Medical Prescriptions
Keep digital copies of pharmacy receipts, clinic prescriptions, utility bills, and rental agreements stored safely as searchable PDF documents.
KYC & Banking Documents
Scan cancelled cheques, bank passbook front pages, PAN cards, and voter IDs in pristine clarity with guaranteed 100% offline security.
Related Editing & PDF Tools
Frequently Asked Questions (FAQ)
How does the SizeSnap Document Scanner work?
SizeSnap uses advanced computer vision (OpenCV.js) directly inside your web browser. When you aim your phone camera or upload a photo of a document, the tool automatically detects the 4 corners of the paper, crops away the bedsheet or table background, corrects the perspective angle to make it flat, sharpens the text, and lets you combine multiple pages into a clean PDF.
Is my document uploaded to any external server or cloud?
No, absolutely not. All edge detection, perspective warping, image cropping, and PDF compilation run 100% locally on your device hardware using HTML5 Canvas, WebAssembly, and JavaScript. Your confidential documents, Aadhaar cards, marksheets, and bank receipts never leave your phone or computer.
Can I scan multiple pages and combine them into one PDF?
Yes! After scanning or uploading your first page, simply click the "+ Add Page" button. You can scan up to 30 pages sequentially. You can preview, reorder pages with "Move Left" / "Move Right" buttons, re-scan any page if blurry, or delete unwanted pages before exporting as a single multi-page PDF.
Is this document scanner completely free without any watermark?
Yes, 100% free with no watermark. Unlike commercial apps like CamScanner that insert annoying "Scanned with CamScanner" watermarks or limit pages behind paywalls, SizeSnap produces completely clean, professional PDF documents without branding or hidden fees.
Can I manually adjust the corners if the auto-detection is not exact?
Yes. After capturing or uploading an image, the tool highlights the detected document boundary with 4 corner handles (Top-Left, Top-Right, Bottom-Right, Bottom-Left). You can easily drag any handle with your finger or mouse to fit the exact document edges before applying the final scan.
What should I do if my photo has heavy shadows or low contrast?
For best results, place the paper document on a contrasting background (e.g. white paper on a dark table or bedsheet), avoid placing your phone directly under a single overhead light bulb to prevent hand shadows, and keep the phone as parallel to the document as possible.
Which file formats can I download?
You can download your scans in three convenient formats: (1) Multi-page PDF containing all scanned pages in sequence, (2) ZIP archive containing high-resolution JPG images of each page, or (3) Single JPG image of any individual page.