How to scan paper into a PDF on a Samsung Galaxy

Three ways to get a PDF scan on a Galaxy phone

Marek is an electrical contractor sitting in his van with a Samsung Galaxy S23. Before the 2 pm Friday billing cutoff, he must upload a six-page signed site inspection checklist and two supplier invoices to a contractor portal as one file named inspection_bay4_signed.pdf, capped at 5 MB. He used the yellow scan button in his Samsung Camera app on all eight sheets, only to find eight separate cropped JPG files in his Gallery instead of a combined PDF.

Using the built-in Samsung Camera document detector

Galaxy phones running One UI include automatic edge detection in the Camera app. Lay your sheet on a dark, matte surface such as a clipboard or car seat so all four paper edges stand out. Open the Camera app in default Photo mode on the 1x lens and hold the phone flat above the page.

Once the camera locks onto the corners, a yellow rectangle outlines the paper and a yellow scan button (labelled Scan or marked with a T icon) appears. Tap that yellow button rather than the white shutter, drag the corner handles to the paper edges, and pick a color mode before saving.

If the yellow outline never shows up, check three settings:

• Camera settings toggle: Open the gear icon in the Camera app and confirm Scan documents and text (or the scene-optimization setting and the document-scanning setting on earlier One UI releases) is switched on.
• Lens and mode: Detection runs only in normal Photo mode on the main rear lens, not in Portrait, Pro, or on the 0.6x ultra-wide lens.
• Contrast and light: A white invoice on a pale desk hides the paper boundary. Slide a dark folder under the sheet and turn the flash off. For lighting details, see how to scan documents with your phone.

Keep the filter on original color or greyscale when the page carries blue ink signatures or stamps, since harsh black-and-white filters can erase light ink.

Combine separate Samsung Gallery scans into one PDF

On many Galaxy models, the camera scanner saves each cropped sheet into your Gallery as an individual image rather than a PDF. Samsung saves .jpg files by default, unless high-efficiency pictures are turned on in camera settings, which writes .heic files instead.

1. Open JPG to PDF in Samsung Internet or Chrome, or HEIC to PDF if high-efficiency HEIC capture is turned on.
2. Tap Choose images and select all eight cropped scan pictures from your Gallery or the Recent view at once.
3. Review the numbered list and use the up and down arrow buttons to fix pages that the Android picker handed over out of order.
4. Under Page size, select A4 or US Letter with a Narrow or Standard margin so every sheet prints at a uniform size, or leave Match image for screen viewing.
5. Tap Create PDF. The browser builds the file locally, reopens the finished PDF, and verifies the page count, page dimensions, and image pixel sizes before showing Download PDF.

Shrinking the finished PDF and finding it in My Files

Because JPG to PDF copies each JPEG stream byte for byte without re-encoding, small serial numbers and signatures stay crisp. However, eight cropped photos from a Galaxy camera can total 18 MB, exceeding Marek's 5 MB portal cap.

Build the full PDF first and shrink it once afterward. Open Compress PDF, select your PDF, and tap a preset chip (100 KB, 200 KB, 500 KB, 1 MB, or 2 MB) or type 5 into the exact target box with the unit set to MB. If the portal counts a megabyte as 1,000,000 bytes rather than 1,048,576, enter 4800 KB and check the preview before downloading.

When an upload form opens the Android file picker, check these locations:

• Browser downloads: Saved to Internal storage > Download in the Samsung My Files app, and listed under Downloads in upload dialogs.
• Camera scan images: Stored inside Gallery under the Camera or Scans album (Internal storage > DCIM > Camera).
• Google Drive scans: Stored in your Drive folder. Tap the three dots beside the file in Drive and select Download to save a local copy.

Common Samsung scanning mistakes and how to fix them

• Smudged corner from finger removal: Some One UI versions try to erase fingers that hold the page, which can leave a soft smear. Hold the corner down outside the margin with a coin, or pull the yellow crop handles inward.
• One page lies sideways: Holding a phone flat above a desk can trick the orientation sensor. Open the finished file in Rotate PDF, select that page number, turn it 90 degrees upright, and download the updated PDF.
• Tapping the live-text badge by mistake: When a small T icon for copying words appears beside the scan prompt, tap the yellow Scan button that opens the four-corner crop screen.
• Two separate PDFs that belong together: If you scanned the checklist in Google Drive and have the invoices as a separate PDF, combine both files in Merge PDF so vector text on the invoices stays selectable.
• Blurry print across every sheet: Wipe smudges off the rear lens with a clean shirt before shooting page one.

When to skip phone scanning and use another method

A Galaxy camera and a browser converter handle urgent field paperwork well, but three cases call for another route:

• Long stacks of 30 or more sheets: Hand-holding a phone over forty pages produces uneven lighting. Feed large stacks through an office copier or print-shop scanner with an automatic document feeder (ADF).
• Company-managed records: When IT policy prohibits storing client or patient records on a personal phone, use an office scanner or your company's managed app so no copies remain in your Gallery or Trash album.
• Searchable text requirements: Turning Gallery photos into a PDF wraps page images into a document without running optical character recognition (OCR). If the recipient needs selectable text, scan with desktop OCR software.