Can I scan a multi-page document into one PDF?

Yes. After capturing each page you can continue adding pages before you export, so the final PDF contains all of them in order.

What if the edges aren't detected accurately?

Make sure the document lies on a contrasting surface and the whole page fits in the frame. Bright, even lighting gives the edge-detection algorithm the most to work with.

Are my scanned documents stored in the cloud?

No. Processing happens entirely on your device and nothing is uploaded. The PDF is saved locally and only leaves your device when you explicitly share it.

Does it work on crumpled or folded paper?

It works best on flat surfaces. For crumpled paper, try flattening it as much as possible so the edge-detection can find clean borders.

Document Scanner

APP

Scan documents to crisp, shareable PDFs with edge detection.

Best on the app

Document Scanner needs your phone's hardware

It uses the camera + edge detection to capture pages. Download Carbide free to use it — plus all 111 tools, fully offline.

SCAN TO INSTALL

What it does

Document Scanner turns your phone camera into a portable scanner that produces clean, print-ready results. Point it at a receipt, contract, whiteboard, or any piece of paper and the tool's edge-detection algorithm automatically finds the document's borders, corrects perspective, and crops out the background. You get a sharp, well-lit image that looks nothing like a crooked phone photo. You can capture multiple pages and export them as a PDF you can share instantly, all without signing up for anything or uploading a single pixel to the cloud. It runs completely free, entirely on your device, and works offline — ideal for scanning on the go when you need a professional-quality result right now. Carbide keeps your documents private: they stay on your device until you choose to share them.

How to use the Document Scanner

Open Document Scanner in Carbide and allow camera access.
Frame the document in the viewfinder — the edge-detection outline appears automatically around it.
Tap Capture when the document borders are clearly highlighted.
Add more pages if needed, then tap Export to save or share the finished PDF.

Frequently asked questions

Can I scan a multi-page document into one PDF?: Yes. After capturing each page you can continue adding pages before you export, so the final PDF contains all of them in order.
What if the edges aren't detected accurately?: Make sure the document lies on a contrasting surface and the whole page fits in the frame. Bright, even lighting gives the edge-detection algorithm the most to work with.
Are my scanned documents stored in the cloud?: No. Processing happens entirely on your device and nothing is uploaded. The PDF is saved locally and only leaves your device when you explicitly share it.
Does it work on crumpled or folded paper?: It works best on flat surfaces. For crumpled paper, try flattening it as much as possible so the edge-detection can find clean borders.

Take Carbide everywhere

All 111 tools, offline, on iOS & Android — free.