Visa applications, university admissions, bank KYC, job onboarding — they all want a scan of something small and official, and they all reject the first attempt. The reasons are consistent enough to plan around: glare from a flash or overhead light bouncing off a laminated card and whiting out exactly the part they need to read; cropped edges that make the document look tampered with, which most reviewers reject on sight; background in the frame, a card photographed on a patterned tablecloth with a thumb in the corner not reading as a document; a file that’s simply too big for a portal that caps uploads and won’t tell you clearly; sending one side when they asked for both; and a card shot from an angle, which becomes a trapezoid with half of it out of focus.
Doing it properly with a phone
Scan to PDF is built for this and runs in the browser, no app to install. On a computer the page shows a QR code — scan it with your phone to continue there, since a laptop can’t photograph a card well. Set up the shot on a plain, contrasting surface — a dark card on white paper, a white certificate on a dark desk, flat with no curling. Use indirect daylight, near a window rather than under a ceiling light directly overhead, and never with the flash on; if your own shadow falls across the page, turn 90°. Shoot straight down, holding the phone parallel to the document rather than tilted, filling the frame but leaving a small margin so no edge is clipped. Capture both sides — photograph the front, then the back, as two captures in the same session, and they become pages 1 and 2 of one PDF, which is what “upload a scan of your ID” almost always means. Crop each page, dragging the rectangle down to the document edges so the desk and your fingers aren’t part of the file. Pick a mode: Colour for photo IDs, passports, and anything with a seal, hologram, or signature in colour, since reviewers often need to see them; Black & White for a crisp, classic scan of plain printed certificates and transcripts, producing a much smaller file; Grayscale in between. Tick Compress if the portal has a tight size limit.
If the upload still bounces, compress the PDF and check the result is legible at 100% zoom before uploading. For very low limits like 100 KB, rescan in Black & White and make sure you cropped tightly, since background pixels cost real space — but don’t crop into the document itself to save size.
You’re about to email a copy of your passport, so two things are worth doing: lock the PDF with a password, AES-256 encryption sent by a different channel from the password itself (many institutions expect this), and check the metadata before sending it outside your organisation, clearing anything you’d rather not share.
Fixing a scan you already have
Fixing a scan you already have: a sideways page needs Rotate PDF, or How to Rotate Only One Page in a PDF if the rest of the file is fine. A blank or duplicate page from the scanner needs Delete PDF pages. Front and back in two separate files need merging. A portal that wants searchable text needs OCR. Several of these at once? Edit PDF does rotate, delete, reorder, and page numbers from one thumbnail view and one download.
Part of a bigger packet? How to Submit Documents for a Visa Application or How to Prepare Documents for College Admissions. Going into permanent storage rather than an upload form? How to Build a Digital Document Archive for Your Family.
Open the free Scan to PDF tool on your phone — no app, no sign-up, no watermark, and your photos are never stored.