How do I make a photo look like a scanned document?

Three things make a photo look scanned: perspective correction (the page becomes a true rectangle), cropping away the background, and contrast enhancement. PDFGami's document scanner does all three in your browser: drag the four corner handles onto the page edges, choose the Enhanced or B&W scan output style, and Apply. The output is a flat, clean page like a flatbed scan.

Is it safe to scan IDs or contracts with an online tool?

With cloud-based scanner tools, your document photo is uploaded to their servers — risky for IDs and contracts. PDFGami runs the entire pipeline (corner detection, perspective warp, enhancement, PDF assembly) in your browser. Nothing is uploaded; you can verify in the browser developer tools network tab.

Can I scan multiple pages into one PDF?

Yes. Upload all the photos at once. The tool iterates through them one page at a time — you confirm the corners for each — and at the end you download a single PDF containing every corrected page in order.

Does the corner detection work automatically?

The tool pre-suggests corners using a brightness heuristic (paper is usually brighter than the background). It works well for documents on a dark desk, but it is a suggestion, not a decision — you always see the detected outline and can drag any corner before applying. If detection fails, the handles start at a neutral inset position.

What is perspective correction, technically?

The tool computes a homography — a 3x3 projective transform — from the four corners you set to a flat rectangle, then inverse-maps every output pixel back into the photo with bilinear sampling. It is the same approach dedicated scanner apps like mobile scanning apps use, running as plain JavaScript on the Canvas API.

Why not use my phone's built-in scanner app?

Phone scanner apps are great — if you are on your phone and trust the app's cloud. PDFGami is useful when the photos are already on your computer, when you want batch processing with manual corner control, or when the documents are sensitive enough that a no-upload guarantee matters.

Turn Document Photos into Scanned PDFs — Free & Secure

Turn photos of documents into clean scanned PDFs. Auto-detect corners, adjust perspective per page, enhance contrast — free, secure, browser-only, no upload.

Click, drag and drop, or paste

Drop photos of your documents (JPG, PNG, WebP) — or paste a screenshot. Everything is processed in your browser; photos are never uploaded.

Paste a screenshot with Ctrl+V (Cmd+V on Mac)

Privacy Guaranteed—No Server Uploads

Why does PDFGami never upload your files?

Read the practical security guide on why browser-based PDF tools are safer for confidential documents.

From a desk photo to a flat scan

Corrected with the tool on this page.

Photo of a document on a desk shot at an angle, with a shadow across one corner — Corners dragged to the page, colour-boost enhance — The perspective warp squares the page up and the enhance pass normalises each colour channel separately, which is what pulls the warm indoor cast out of the paper and leaves it white.

The same document corrected to a flat rectangular scan with neutral white paper — Corners dragged to the page, colour-boost enhance — The perspective warp squares the page up and the enhance pass normalises each colour channel separately, which is what pulls the warm indoor cast out of the paper and leaves it white.

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Turn Document Photos into Scanned PDFs — Free & Secure

Took photos of a contract, receipt, or worksheet at an angle? PDFGami's document scanner fixes the perspective so each photo looks like it came out of a flatbed scanner. Upload multiple photos, and the tool walks you through them one at a time: it auto-suggests the four document corners, you drag the handles to fine-tune, and Apply straightens the page. When every page is done, download the whole batch as a single PDF or as JPG images. All processing — corner detection, perspective warp, contrast enhancement — runs in your browser. Your documents are never uploaded, which makes this safe for IDs, contracts, and medical paperwork.

Perspective Correction

A 4-corner homography warp turns angled photos into flat, rectangular pages — the same math dedicated scanner apps use.

You Stay in Control

Corners are auto-suggested, but nothing is applied until you confirm. Review and adjust every page one at a time.

100% Private

Photos of IDs, contracts, and receipts never leave your device. Detection and warping run in browser memory only.

Scan-Style Output

Optional contrast enhancement or black-and-white scan look. Export all pages as one PDF or as JPGs.

!How to Merge PDFs Locally

Drop photos of your documents (JPG, PNG, WebP) — multiple pages at once is fine.

For each photo, the tool auto-detects the document corners and shows draggable handles.

Fine-tune the four corners so the outline hugs the page edges, pick an output style, and click Apply & Next.

Repeat for each photo — Skip any you don't want.

Download the corrected pages as a single scanned-style PDF, or as JPG images.

Local vs. Server Merging

Feature	Local (Us)	Cloud Merger
Privacy	No upload (browser-only)	Photos uploaded to vendor cloud
Control	You confirm every page	Fully automatic, wrong crops happen
Cost	Free, no watermark	Scanner apps often subscription
Install	None — runs in browser	Mobile app install required

Technical FAQ

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