Drop your photo, get a clean head-and-shoulders JPEG around 1 MB — a sensible upload size, not an official cap, because College Board doesn’t publish one. Nothing is uploaded; it all runs in your browser.
The SAT photo spec lives on College Board's own requirements page, and the entire file rule is one sentence: “Photos must be in one of these file formats: .jpg, .gif, or .png. You'll be able to crop and reposition your photo after you upload it.” That's it. No pixel dimensions, no file-size cap, no background colour, no DPI — we read the official requirements page and the official registration-and-test-day PDF guide, and no photo numbers appear in either. The page even lists where a photo may come from: a phone or camera, a file on your device, Facebook, or a scanned paper photo. This page presets a 1 MB target with no exact dimensions; both choices are explained below, and neither is an official number, because there aren't any.
College Board's page carries a warning most students skim past: “Getting a message that your upload was successful doesn't mean that your photo meets all requirements. The message means only that your photo is the correct file type and size.” Two things follow. First, an upload-time type-and-size check exists, but its number isn't published anywhere — a modest file that sails through is the safe play, which is what the 1 MB preset gives you. Second, and more important: the checks that actually keep students out of the test room are human ones about the picture's content, applied later — and if the photo fails them, the official line is blunt: you won't be allowed to test.
All of the real requirements are about what's in the frame: you're facing the camera head-on (no tilt, both shoulders equally distant), you're the only person in the picture, your entire face, both eyes, and hair are visible, the photo is in focus with no dark spots or shadows, and there's no hat or head covering unless worn for religious purposes. Black-and-white is fine. The rule with a distinctly 2020s flavour: a photo that's been digitally altered to change your appearance — including filters — is grounds for rejection. So no beauty mode, no lens effects, no cropping a friend out of a party shot (their shoulder in the frame counts as another person). The photo must also match how you'll look on test day: staff compare it against your photo ID at the door, so a two-year-old picture with different hair works against you. Take a fresh one against a plain wall in daylight — it takes less time than arguing at the test centre.
Search for “SAT photo size” and the confident figures pile up: college-advice forum answers state “no more than 2 MB” with “at least 640×480 pixels”, another answer on the same site says “between 10–300 KB”, a third says “at least 2×2 inches (51×51mm)” — three mutually contradictory specs, none of which appear on the official page. Photo-tool sites meanwhile sell a “2×2 inch (600×600 pixel) white background” SAT photo — that's the US passport and visa spec transplanted onto an exam that publishes no such rule. A passport-style photo will of course pass — it's a well-lit head-on portrait — but nothing requires the square, the white backdrop, or the print sizing, and paying for them buys nothing. If the upload screen in front of you ever states specific numbers, the screen wins; as of our check there are none to obey.
With no published cap, the practical enemy is the opposite one: a modern phone photo is a 3–12 MB file, and an unpublished server-side size check plus school Wi-Fi is exactly where an oversized upload stalls or bounces with an unhelpful error. A ~1 MB JPEG is visually indistinguishable for a head-and-shoulders portrait, uploads fast, and is comfortably inside any size check a mainstream web form runs. That's a reliability choice, not compliance — there is no official number to comply with. Dimensions are left empty for the same reason: College Board's own uploader lets you crop and reposition after upload, so pre-cropping to an invented square helps nobody. If you want a tidy crop anyway, type a size into the exact-size box — the draggable crop preview keeps your head centred and your shoulders in frame. An iPhone HEIC drops straight in and comes out as a JPEG the form accepts.
The registration photo never appears on your admission ticket; it goes to the test centre's staff roster, where staff compare it to you and to your physical photo ID on test day. The ID rules are their own list (government- or school-issued, original, valid, with a recognisable photo — details at College Board's ID-requirements page), and no amount of photo-resizing fixes a forgotten ID. Registration itself runs through your College Board account at satsuite.collegeboard.org — the photo step is one screen of it. Uploading early beats the deadline-day rush: if your photo is later flagged as not meeting requirements, you want time to replace it.
The photo requirements — with example photos of what passes and what doesn't — are on College Board's official page: satsuite.collegeboard.org › SAT › Registration › Photo Requirements. A registration photo travels with your name, date of birth and address, so it shouldn't detour through a resizer's server: PixFit re-encodes entirely in your browser, nothing is uploaded, and the re-encode strips EXIF metadata (including GPS) as a side effect — a reasonable default for a teenager's photo headed anywhere. Taking the ACT too? Its page — unlike this one — publishes real numbers: see the ACT photo page (5 MB cap, 640×480 minimum). Law school later? The LSAT photo page has the same .jpg/.gif/.png list — and the same unpublished size cap. For other upload formats, see the US visa photo, US passport renewal and DV lottery pages, or the full verified table.