How Do You Scan an Image to PDF?
You scan to PDF by photographing your pages with Scan with camera, or adding scanned images, then cropping each page and clicking Convert to PDF. QuickCatPDF straightens the paper, brightens the background to clean white and saves a document-style PDF, all inside your browser with nothing uploaded.
It works like a scanner app without installing one, which is handy for forms, receipts, letters and notes. You can also turn existing scans to PDF, such as images saved by a flatbed scanner.
How to Scan to PDF With QuickCatPDF
Scanning a document takes four steps.
- Tap Scan with camera and photograph each page, or click Select images to add photos or scanned image files.
- On each thumbnail, tap Crop and straighten, drag the four corners onto the edges of the paper and tap Apply crop.
- Choose a Look: Document (clean white paper), Black and white, Grayscale or Original colour. It applies to all pages.
- Click Convert to PDF, then Download PDF.
Pages come out on A4 with small margins by default; change Page size to US Letter if you're in North America.
Why Use QuickCatPDF to Scan Documents?
QuickCatPDF gives you scanner-style clean-up in the browser. The crop corrects perspective, so a page photographed at an angle comes out as a flat rectangle, and the Document look evens out shadows and turns grey paper white so text stands out.
Private papers stay private. Bank letters, medical forms and ID documents are processed on your phone or computer and never uploaded.
The PDFs stay small. Image quality starts at Balanced, and the Black and white look stores pages at one bit per pixel; in our test, a black-and-white page came out at 3 KB.
What it doesn't do: corners are placed by you rather than detected automatically, and the text in the PDF isn't searchable. It also can't control a scanner connected to your computer, but it works with any images your scanner has saved.
Which Look Should You Choose?
Document suits most paper: it keeps colour (stamps, signatures, highlighter) but whitens the background. Black and white gives the sharpest, smallest result for typed text and forms, and prints cleanly on any printer.
| Look | Best for |
|---|---|
| Document (clean white paper) | Letters, forms with signatures or stamps, notes with highlighter |
| Black and white | Typed text, printed forms, anything you'll fax or print |
| Grayscale | Pages with pencil, shading or photos |
| Original colour | Colour brochures, drawings, receipts with coloured logos |
The thumbnails show the chosen look straight away, so you can compare before converting.
How Do You Take a Good Scan With a Phone?
Place the page on a dark, flat surface in even light, and hold the phone directly above it. Avoid your own shadow and the flash glare on glossy paper.
Fill most of the frame with the page but leave a little background around all four edges, so the corners are easy to place. If a page is slightly curved or angled, the crop's perspective correction straightens it.
How Do You Scan Student Notes or Multi-Page Documents?
Photograph every page in order, then check the thumbnails: the numbers show the page order, and Move earlier and Move later fix any mistakes. Use Sort by name or date if your camera numbered the files.
Turning student notes scans to PDF is a common use: the Document look keeps pen colours and removes the grey from lined paper. If the PDF must fit an upload limit, run the pages through Image to PDF under 200KB; for multi-page TIFF files from a scanner, use TIFF to PDF.
Frequently asked questions
Can I scan to PDF with my phone?
Yes, open the page in your phone's browser and tap Scan with camera. Take each page in turn, then crop, convert and download the PDF.
Does it detect page edges automatically?
Not yet. You drag the four corners onto the paper's edges, which takes a few seconds per page and also lets you crop exactly what you want. Arrow keys move the selected corner precisely.
Can I make the scanned text searchable?
No, this tool creates image pages, so the text can't be searched or copied. A text-recognition tool is planned for a later update.
Is Scan to PDF free?
Yes, it's free, with no sign-up, no watermark and no daily limit.
Are my scans uploaded?
No, every step runs on your device. After the first visit, the page also works without an internet connection.
Which image files can I add as scans?
Scanned images to PDF work in any format the site supports: JPG, PNG, HEIC, WebP, AVIF, TIFF, GIF, BMP and more. iPhone photos in HEIC work directly; see HEIC to PDF for details, or Image to PDF to convert photos without clean-up.
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