document

Document Scanner

Scan paper with a phone, correct perspective, organize pages, and create submission-ready PDFs with A4 and file-size presets.

View on GitHub

Local processing

About your filesFiles and content selected in this tool are processed in your browser and are not uploaded to a Browser Kitty backend.

Operation demo See the basic workflow in a short video.

About this tool

Document Scanner turns photos of paper documents into multi-page PDFs in the browser. It detects document corners, lets you correct the four points manually when needed, and applies perspective correction to pages photographed at an angle.

Beyond simple image-to-PDF conversion, it includes common submission constraints such as A4 layout, black-and-white output, and 1 MB / 2 MB target sizes for government, school, insurance, or workplace forms. Image processing and PDF generation stay on the device.

Good for

Submit photographed paper forms to government, school, insurance, or workplace portals
Correct skewed document photos and combine multiple pages into one PDF
Meet submission requirements such as 1 MB / 2 MB limits, A4 layout, or black-and-white output

What it can do

Key capabilities available in this tool.

Camera capture and automatic corner detection
Perspective correction and color / gray / B&W filters
Multi-page organization with drag reorder
1 MB / 2 MB, A4, and B&W submission presets

How to use

Open the tool on a phone and enable the camera or add existing images.
Capture the full page, review the detected corners, and adjust the four points manually if necessary.
Choose Auto, Color, Gray, or Black & White, then add the corrected page.
Repeat for additional pages and drag the page cards into the correct order.
Choose A4, 1 MB / 2 MB, B&W, or other submission settings, generate the PDF, then review its size and save or share it.

Supported

Input: camera capture or existing device images, with multiple pages.
Correction: automatic corner detection, manual four-point adjustment, perspective correction, Auto / Color / Gray / B&W.
Submission presets: under 1 MB, under 2 MB, A4 portrait/landscape, and black-and-white.
Output: PDF download and Web Share API on supported devices.

Limitations and notes

Automatic corner detection can fail on white surfaces, low contrast, reflections, strong shadows, or when document edges are outside the frame.
1 MB / 2 MB targets are best-effort and may require substantial quality reduction for many or image-heavy pages.
Camera, torch, native zoom, and sharing features depend on device and browser support.
The tool is not intended for OCR or generation of searchable-text PDFs.

Frequently asked questions

Are scanned documents uploaded to a server?

No. Camera-image processing, corner detection, perspective correction, and PDF generation run in the browser; document contents are not uploaded to Browser Kitty.

Can it create PDFs under 1 MB or 2 MB?

Yes. 1 MB and 2 MB presets progressively adjust JPEG quality and resolution toward the target, although results are best-effort depending on page content.

Can it correct a document photographed at an angle?

Yes. It detects the document corners and allows manual adjustment of the four points before applying perspective correction.

Can I use it without camera access?

Yes. You can add existing photos or scanned images from the device and still correct, organize, and export them as PDF.

Offline version and source code

The root-level document-scanner.html on GitHub is a self-contained single HTML build. Existing images can be processed locally, while camera availability depends on browser and OS security rules. The HTTPS Browser Kitty version is generally better suited to phone camera use.

View source on GitHub