A phone camera can produce a useful document scan when the page is photographed evenly, cropped carefully, and packaged at an appropriate PDF size. The steps below cover that workflow without requiring a scanner app.
Step 1: Take a photo worth processing
Every later step amplifies the quality of the shot; thirty seconds here saves the most time:
- Light the page evenly. Daylight from a window beats overhead lamps. The classic mistake is your own shadow falling across the page; stand so the light comes from the side.
- Shoot straight down. Hold the phone parallel to the page. A tilted shot turns the rectangle into a trapezoid, and text at the far edge goes blurry because it's at a different focal distance.
- Fill the frame while leaving a small margin for cropping.
- Contrast helps. A white page on a dark table lets you (and any software) find the edges instantly.
Step 2: Crop to the page
Crop away the table, fingers, and excess margin. Any remaining background becomes part of the PDF page. The crop tool processes the photo locally in your browser.
Step 3: Make the text pop
Camera photos of paper come out grey and dim, because cameras expose for the average of the scene. Two adjustments fix ninety percent of it: raise brightness until the paper looks white instead of grey, then raise contrast until the text is decisively dark. For text-only documents, going full black and white often gives the cleanest, most "scanned" look; it also hides yellowed paper and uneven lighting. The filters tool has all three sliders, and the black & white converter is the one-step version. Skip the grayscale step for anything where color carries meaning: ID cards, highlighted text, stamps, signatures in blue ink.
Step 4: Package it as a PDF
Institutions expect documents as PDFs, not JPGs; a PDF fixes the page size and prints predictably. The image-to-PDF converter turns the cleaned image into a PDF with the choices that matter:
- Page size: pick Letter or A4 (whichever your region uses) rather than image-size, so the result prints like a normal document.
- Margin: a modest margin looks like a scan; zero margin looks like a photo.
- Fit: "fit inside page" preserves the whole document; "fill page" crops edges to cover the page; fit is almost always what you want for documents.
Step 5: Combine multi-page documents
For a multi-page document, process each photo through the same steps, convert each to a PDF, then combine them with the merge tool; drag the pages into order and download one file. A quick pass through the page editor afterwards catches accidental duplicates or a page scanned upside down (delete and re-add it).
Keeping the file size reasonable
A PDF made from full-resolution phone photos can easily hit 10–20 MB for a few pages, and upload portals commonly cap at 5 or 10 MB. The fix belongs at the image stage: before converting to PDF, downsize each photo; around 1,500–2,000 px on the long edge keeps text crisp at a fraction of the size. Our guide to shrinking image files covers the details.