Most Indian households and many small offices do not own a scanner. The phone camera has quietly replaced it: we photograph marksheets for admissions, bills for reimbursement and agreements for the landlord. But a quick photo is not the same as a scan. Shadows, tilted pages, blurred text and a dark background make documents hard to read and can get them rejected. With a few simple techniques, your phone can produce results that are close to a flatbed scanner. This guide covers light, angle, apps, and turning the images into a tidy PDF.
Set up a simple scanning spot
- A dark, plain surface. A dark table, bedsheet or chart paper makes the white page stand out, which helps scanner apps detect the edges automatically.
- Soft, even light. Daylight from a window, not direct sun, is ideal. At night, use two lights from opposite sides to avoid shadows. Avoid the flash; it creates a bright hot spot and glare on glossy paper.
- Flatten the page. Unfold creases and hold curled corners down with coins or a ruler outside the text area. For books, press the page flat gently.
Hold the phone correctly
- Hold the phone directly above the page, parallel to it. Tilting causes a trapezoid shape and uneven focus.
- Stand so that your body does not cast a shadow on the page. Shoot slightly from the side of the light, not with your back to it.
- Fill the frame with the page, leaving a small margin around the edges.
- Tap the screen on the text to focus, wait a moment, and hold your breath as you press the shutter. Blur from hand shake is the most common problem.
- Zoom into the photo to check it before moving on.
Use a scanner mode
Most phones already include document scanning:
- Google Drive (Android): tap + → Scan. It detects edges, straightens the page and offers filters.
- Files app or Notes (iPhone): "Scan Documents" automatically crops and flattens pages.
- Built-in camera "document" modes on many Android phones, and Google Lens.
- Microsoft Lens and similar apps.
These modes correct perspective so the page looks flat and rectangular. Choose the "black and white" or "document" filter for typed text, which makes text crisp and files small. Use "colour" or "original" for photos, stamps in colour, or certificates where colour matters.
Be thoughtful about third-party scanner apps: some upload your scans to their cloud or request broad permissions. For identity documents, prefer the phone's built-in tools.
Turn photos into a PDF
If your scanner mode saved images instead of a PDF, or you used the normal camera:
- Open JPG to PDF on your phone.
- Select the images in the correct order.
- Choose A4 page size, portrait orientation and a small margin for a scanner-like look.
- Convert and download. The conversion happens on your device.
Our JPG to PDF guide covers page size, ordering and file size in more detail.
Clean up after scanning
- Crooked or sideways pages: fix them with Rotate PDF; see how to rotate pages permanently.
- Dark edges or table visible around the page: trim with Crop PDF, explained in our cropping guide.
- Too large to upload: compress with Compress PDF or a target size such as 200 KB.
- Wrong order: rearrange pages with Organize PDF.
Scanning special documents
ID cards
Place the card on a dark surface and photograph front and back separately. Get close so the card fills most of the frame, and avoid glare on laminated cards by tilting the light rather than the phone. To place both sides on one page, follow this guide.
Receipts and thermal paper bills
These fade quickly. Scan them soon after purchase, using the black and white filter for maximum contrast.
Multi-page booklets
Scan each spread as two separate pages, pressing the centre fold flat. Keep pages in sequence as you go to avoid reordering later.
Photos and old certificates
Use colour mode, avoid any filter that sharpens or changes colours, and shoot at the highest resolution for archiving.
Scanning for OCR
If you plan to extract text from the scan, quality matters even more. Aim for sharp, straight, evenly lit pages in which a line of text fills a good part of the width. Then use Image to Text or Scanned PDF to Text. For copying text from screenshots and photos, read how to copy text from an image.
Storing your scans
- Name files clearly with date and description, for example 2026-10-electricity-bill.pdf.
- Keep important document scans in one folder, backed up to a cloud service with a strong password and two-step verification.
- Protect sensitive PDFs with Protect PDF.
- Keep the originals of important papers; a scan supplements them but is not always a legal substitute.
Where to keep your scans
Create a dedicated folder for important documents, such as certificates, ID cards and bills, and name each file with the document type and date. Back them up to your own cloud storage, but protect sensitive files like ID cards with a password using Protect PDF. When you need to upload one, you will have a clean, ready file instead of rushing to rescan at the last minute.
Summary
Use soft light and a dark background, hold the phone parallel and steady, use the built-in scanner mode, and finish with JPG to PDF, rotation, cropping and compression as needed. Five careful minutes produce a document that anyone can read.
Try it now: JPG to PDF is free to start and works on mobile and desktop.
Open JPG to PDF