Scan to PDF — Free Browser Document Scanner, No App Required
Use your device camera to scan documents into a PDF. Auto edge detection, perspective correction, and image filters. Or use your phone camera via QR code for superior capture quality. Runs in your browser — no app required. The optional phone scan uses a temporary server session.
Scan to PDF converts a physical document into a digital PDF file using your device camera, directly in your browser, with no app to install. This scanner includes auto edge detection, which identifies document boundaries in the camera frame, and perspective correction, which geometrically straightens images taken at an angle. A live filter preview lets you enhance text clarity before saving. Scan multiple pages into a single PDF. Or scan the QR code with your phone to pair your phone camera with the browser session — useful when you need better camera quality on a desktop screen. Direct browser scanning keeps all image data on your device. The optional QR phone feature uses a temporary server session.
Two Ways to Scan Documents to PDF
Direct Browser Scan
Uses your current device camera — laptop webcam, desktop USB camera, or mobile rear camera — directly in the browser. All image processing happens locally using JavaScript. No image data is uploaded to a server at any point.
Best for: quick scans, privacy-sensitive documents, mobile use when already on your phone.
Scan with Phone via QR Code
Generates a QR code in your desktop browser. Scan it with your phone camera to open a temporary web page that pairs your phone with the browser session. Use your phone's rear camera — typically far better resolution than a laptop webcam — to capture documents, with results appearing on the desktop screen.
How to Scan a Document to PDF
Three steps. Two scanning modes. Auto edge detection, perspective correction, and live filters on every capture.
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Step 1: Start Scanning in Your Browser
Click Start Scanning to activate your device camera in the browser, or click Scan with Phone to generate a QR code that pairs your phone camera with the browser session. No app, account, or signup is required. Direct browser scanning keeps all data on your device; the optional QR mode uses a temporary server session to relay images between your phone and the browser.
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Step 2: Capture and Correct Each Page
Position the camera over the document. Auto edge detection draws a crop boundary around the document automatically, which you can adjust if needed. Perspective correction straightens the image if the camera angle is not directly overhead. Apply a live image filter — text enhancement, handwriting optimisation, or photograph mode — and preview the effect before confirming the scan.
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Step 3: Add Pages and Download Your PDF
Add additional pages to the same document — each goes through the full edge detection, perspective correction, and filter pipeline. When you have captured all pages, download the complete document as a single multi-page PDF. No watermark is added. No account is required. Your original images and the assembled PDF stay on your device in direct scan mode.
What This Browser Document Scanner Includes
Auto edge detection, perspective correction, and live filter preview — in a browser. Competitors require an app download for these features.
Scan with Phone (QR)
Generate a QR code in your browser session and scan it with your phone to pair your phone camera with the browser. Use your phone's superior rear camera to capture documents while reviewing on a desktop screen. No other free document scanner offers this. Uses a temporary server session; no content is retained after the session ends.
Files stay in browser (direct mode)
Direct browser scanning keeps all image processing in your browser using JavaScript. No image data leaves your device. This applies to the Start Scanning mode. The optional QR phone mode uses a temporary server session. PDF24, SmallPDF, Adobe Scan, and CamScanner all process or store scans on their servers.
No ads or interruptions
No advertising banners, pop-ups, or sponsored content in the scanner interface. All four comparison tools show advertising. A clean, distraction-free interface is particularly important when handling sensitive document scanning.
Auto edge detection
Automatically identifies the rectangular boundary of a document within the camera frame and draws a crop outline. You can adjust the detected corners manually before confirming. PDF24 does not include this in its browser tool. SmallPDF, Adobe Scan, and CamScanner offer it only in their apps.
Perspective correction
Geometrically transforms angled photographs of documents into flat, overhead-perspective images. Corrects distortion caused by the camera not being directly above the document. PDF24 and SmallPDF do not include perspective correction. Adobe Scan and CamScanner include it in their apps only.
Live filter preview
Apply and preview image enhancement filters before saving each scan. Modes include text enhancement for printed documents, handwriting optimisation, and photograph rendering. Filters are previewed live so you can compare effects before confirming. No other browser-based scanner in this comparison offers live filter preview.
Multi-page scanning
Capture multiple document pages in sequence and download all pages as a single PDF. Each page goes through the full edge detection and correction pipeline. PDF24 also supports multi-page scanning in its browser tool. SmallPDF, Adobe, and CamScanner require their mobile apps.
Works in any browser
No app download, installation, or device storage required. Works in any modern browser on desktop, laptop, tablet, or mobile. PDF24 also works in a browser but without edge detection, perspective correction, or live filters. SmallPDF, Adobe, and CamScanner require app installation for full functionality.
When to Use the Browser Document Scanner
- Scanning contracts and agreements. Professionals who receive paper contracts, signed agreements, or NDAs need a quick way to produce a clean, readable PDF for email or document management. Browser-based scanning eliminates the need to find a physical scanner or install an app. The QR phone feature allows using the phone camera for a sharper capture while managing the file on a laptop.
- Digitising receipts and invoices. Finance teams and individuals tracking expenses can scan paper receipts, vendor invoices, and expense documents to PDF for accounting software, HMRC submissions, or reimbursement workflows. Multi-page scanning handles invoice packages. Auto edge detection ensures clean captures without manual cropping.
- Scanning ID documents and forms. Submitting passport copies, driving licences, signed forms, or residency proof documents digitally requires accurate reproduction of the physical document. Perspective correction ensures the scanned output appears flat and correctly proportioned. Direct browser scanning keeps sensitive identity document images on the device without uploading to any third-party server.
- Students scanning lecture notes and textbooks. Students without a physical scanner can use their phone camera via the QR feature to scan handwritten notes, printed lecture materials, or textbook pages into a single PDF for digital revision. Live filter preview lets them select handwriting optimisation mode for cleaner results on handwritten content.
- Remote workers without office scanning equipment. Remote employees occasionally need to scan physical documents — onboarding paperwork, banking correspondence, insurance documents — without access to office scanning infrastructure. The browser-based scanner works on any device with a camera, requires no IT approval, and produces a PDF immediately suitable for email attachment or cloud upload.
The only full-featured browser scanner
Most document scanners are mobile-app only. This scanner works in your browser with auto edge detection and perspective correction — features competitors deliver only through app downloads. And it's the only scanner that lets you pair your phone camera with a desktop browser via QR code.
| Feature | PDF24 | SmallPDF | Adobe | CamScanner | Ours |
|---|---|---|---|---|---|
| Works in browser | ✓ | ✗ App only | ✗ App only | ✗ App only | ✓ |
| Scan with phone (QR) | ✗ | ✗ | ✗ | ✗ | ✓ |
| Auto edge detection | ✗ | ✓ App only | ✓ App only | ✓ App only | ✓ (browser) |
| Perspective correction | ✗ | ✗ | ✓ App only | ✓ App only | ✓ (browser) |
| Live filter preview | ✗ | ✓ App only | ✓ App only | ✓ App only | ✓ (browser) |
| Multi-page scanning | ✓ | ✓ App only | ✓ App only | ✓ App only | ✓ |
| No account needed | ✓ | ✗ | ✗ | ✗ | ✓ |
| Files stay in browser | ✗ | ✗ | ✗ | ✗ | Direct mode only* |
| No ads or interruptions | ✗ | ✗ | ✗ | ✗ | ✓ |
| Free & unlimited | ✓ | ✗ | ✗ | ✗ | ✓ |
Competitor information was accurate at time of publication and may have changed.
*Direct browser scanning keeps all image data on your device. The optional Scan with Phone (QR) mode uses a temporary server session to relay images between your phone and the browser — no document content is retained after the session ends.
Frequently Asked Questions
How do I scan a document to PDF for free?
Do I need to download an app to use this document scanner?
How does the Scan with Phone QR code feature work?
What is auto edge detection in the document scanner?
What is perspective correction and why does it matter for scanning?
Can I scan multiple pages into one PDF?
Does this document scanner upload my files to a server?
What image filters are available during scanning?
How does this compare to CamScanner, Adobe Scan, and SmallPDF?
Can I use the document scanner on any device?
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