Convert images to PDF in seconds
Whether you have a folder of photos, screenshots of receipts, or a batch of scanned pages, this image-to-PDF converter bundles them into one PDF without uploading a single byte. It reads JPG, PNG, WebP, GIF, BMP and HEIC files (on browsers that support HEIC natively — most iPhones do).
Every image becomes one page in the resulting PDF. Pages are sized to A4 by default and each image is scaled to fit while preserving its aspect ratio, so nothing gets cropped or stretched. Colour and greyscale images are compressed to JPEG inside the PDF at high quality, giving you small file sizes without visible artefacts.
Why convert images to PDF at all?
- Compatibility. PDFs open on every device without needing image viewers or apps.
- One file instead of many. A single PDF is easier to email, upload to a portal, or archive than a folder of images.
- Predictable printing. A PDF prints the same way on every printer; raw images print at different sizes depending on the app.
- Smaller files. JPEG compression inside a PDF usually beats storing the source PNGs as-is.
Privacy: your files never leave your browser
Most online converters upload your images to a server for processing. That's a real privacy problem when the images are IDs, medical records or contracts. This converter runs entirely in your browser using standard web APIs — Canvas 2D for rendering and jsPDF for PDF assembly — so there is no upload, no server copy, and nothing to opt out of.
How this scanner works
When you tap "Use camera", the scanner asks your browser for a MediaStream at up to 4K resolution. Once you approve the permission prompt, the live viewfinder shows a soft blue overlay wherever it detects a rectangular document — this is real-time edge detection using OpenCV.js running in a Web Worker, so the UI stays smooth even on a mid-range phone.
When you press the shutter, the frame is grabbed with ImageCapture.takePhoto() (falling back to a canvas snapshot on browsers without ImageCapture). The scanner then runs a Canny edge detector, finds the largest four-point contour, and warps the image to a proper rectangle using a 3×3 perspective homography — the same math a flatbed scanner uses when it aligns a slightly-crooked document.
Filters, cropping, page reordering and PDF assembly all happen client-side in JavaScript. The finished PDF is generated by jsPDF and offered as a browser download. Because every step runs in your device, we could not access your document even if we wanted to — there is no network round trip once the page has loaded.
Works on iPhone, Android, and desktop
Works on any modern browser: Safari on iPhone and iPad, Chrome on Android, Chrome and Edge on Windows, Safari and Chrome on macOS, Firefox and Brave on Linux. No install, no App Store, no Play Store — a URL is the entire onboarding step.
iPhone (Safari): iOS 14.5+ gives the crispest capture because Safari exposes ImageCapture.takePhoto(), which pulls a full-resolution still directly from the camera hardware. On older iOS Safari falls back to a canvas snapshot of the video preview — still 1080p, still enough for a legible scan of a printed page.
Android (Chrome / Edge / Samsung Internet): 4K capture is supported on flagship phones from 2021 onwards; older devices are automatically stepped down to 1080p. If you have a rear-camera Android phone, the scanner picks it automatically ({ facingMode: 'environment' }) so you do not have to flip the camera manually.
Desktop / laptop: Webcam capture works, but for desktop the drag-and-drop upload path is usually faster — drop a JPG, PNG, HEIC, WebP, BMP or TIFF into the drop zone and the scanner pipeline (edge detect → warp → filter → PDF) runs on the uploaded image without needing a live camera.
Why use this instead of a scanner app
Most people looking for a free document scanner end up on one of three apps: CamScanner, Adobe Scan or the built-in scanner in Google Drive / Apple Notes. Each has real drawbacks that a browser-based tool sidesteps.
CamScanner is the market leader but has a difficult history: it was removed from the Google Play Store in August 2019 after Kaspersky found the "Necro" trojan module in one of its SDKs, and although CamScanner was later reinstated with the SDK removed, the free tier still watermarks every scan and pushes subscription upsells. This tool has no watermark, no signup, no upsell.
Adobe Scan and Microsoft Lens are cleaner options but require an Adobe or Microsoft account to save scans as PDF, and force the file through Adobe Document Cloud or OneDrive. Your document leaves your device.
Google Drive scan and Apple Notes scan are convenient but ecosystem-locked — Google Drive scan is Android-only, Notes is iOS-only, and neither lets you export as a two-sided ID card PDF or apply the same B&W scanner filter across every page.
A browser scanner solves the union of these problems: no install, no account, no vendor lock-in, no upload of your document, and no watermark. Whether you are on iPhone, Android, Windows or Mac, the tool is the same URL.