You don't need to install a scanner app (with its ads, watermarks and subscriptions) to digitize a document. With your phone camera and the browser you can scan a sheet of paper, fix the perspective so it looks flat, apply a scanner-style filter and export it to PDF — all free and without the document ever leaving your device.
The problem with traditional scanner apps
Popular scanning apps usually:
- Upload your documents to the cloud to process them, which is a serious issue with sensitive papers (ID cards, contracts, medical reports).
- Add a watermark or limit the number of pages unless you pay.
- Fill the screen with ads and ask you to sign up.
A scanner that runs in the browser removes all of that: processing is local, there's nothing to install and no accounts to create.
What turns a photo into a "scan"
Taking a photo of a document isn't enough: it comes out tilted, with perspective and lit by the room. A good scanner applies three steps:
- Edge detection: finds the four corners of the document in the photo.
- Perspective correction (homography): "stretches" the detected quadrilateral into a perfect rectangle. This is what gives that flat scanner look.
- Enhancement filter: adjusts contrast and whitens the background, or applies black and white so the text is crisp and the PDF is light.
How to scan a document step by step
- Open the camera (or upload a photo you already have). On mobile, the back camera gives better quality.
- Frame the document. On desktop, auto-detection highlights the document and captures by itself; on mobile, you frame it and tap capture.
- Adjust the four corners if detection isn't exact. A precision loupe helps you place them well even with your finger.
- Choose the filter: "Magic" enhances and whitens, "Gray" for grayscale, "Black & White" for clean text with no shadows.
- Add more pages by repeating the process; they stack in a list you can reorder or delete.
- Export to PDF (multi-page) or to images.
You can do it for free with the document scanner on this site, which processes everything in your browser.
OCR: extracting the document's text
OCR (optical character recognition) turns the document image into text you can copy, search or edit. A modern scanner can run OCR on the device itself, without sending the document to any external service.
It's ideal for:
- Copying the text from a paper without retyping it.
- Digitizing notes, receipts or contracts and being able to search inside.
- Moving the content of a physical document into an editor.
Spanish and English recognition works well with clear printed text; handwriting is far harder for any OCR.
Tips for quality scans
- Good light, no shadows. Place the document on a surface of a different color than the paper so edge detection works.
- Camera parallel to the paper. The less tilt, the less perspective correction needed and the crisper the result.
- Black & White filter for text. It cleans shadows and greatly reduces PDF size, perfect for text-only documents.
- Magic mode for color documents (invoices with logos, brochures), which keeps the tones but boosts contrast.
Privacy: why do it in the browser
When you scan an ID card, a contract or a medical report, that document is sensitive information. Processing it locally means:
- It isn't uploaded to any server.
- It isn't stored in a third party's cloud.
- It doesn't end up in logs or caches you don't control.
For any confidential document, this isn't an extra: it's the bare minimum.
Frequently asked questions
Do I need to install anything? No. It works in your phone or computer browser, no app.
Is there a watermark or page limit? No. The PDF downloads clean, with as many pages as you want.
Does OCR work offline? After downloading the engine the first time, recognition is local.
Can I scan my ID card? Yes, and being local it's the most private way to do it. Remember to crop well with the corners so only the document shows.
Try the free document scanner and digitize any paper to PDF from your phone, with perspective correction and OCR, without your document ever leaving the browser.