A recent headshot, a true white background, a neutral face, and a JPEG under 2 MB. That is the entire Cambodia eVisa photo spec for Americans in 2026 — and the background and the smile are the two things that bounce the most US files back for a fix.

A recent passport-style headshot taken in the last 6 months, on a plain white or off-white background, with your full face visible, eyes open, and a neutral expression — no smile, no glasses, no hats. Save it as a JPEG, ideally 600×600 pixels or larger and squared off, with the file under 2 MB. A phone photo taken against a true white wall in daylight passes the upload check. The two things that get the most American photos flagged are the background (an off-white or warm-lit wall that reads as gray) and a smile, which the upload validator catches before a human ever sees the file.
The Cambodia eVisa photo has the shortest spec sheet of any document in the application, and it is also the field that sends the most American files back for a fix. The rules are simple to state — a recent headshot, a plain white background, a neutral face, and a JPEG under 2 MB — but two of them quietly catch out US applicants over and over: the background and the expression.
You do not need a drugstore photo counter, a booth at the post office, or any paid app. The phone in your pocket already shoots at a higher resolution than the form needs. What costs Americans a day is almost never the camera. It is a faint smile that feels like a normal photo, or a wall that looks white in your living room but reads as gray to the upload validator under warm indoor light. Get those two right and the rest of the spec falls into place.
This guide lays out the exact size and file specs, drills into the white-background rule that flags more US photos than anything else, and lists the eight things that get a Cambodia eVisa photo rejected — with the fix for each. When you are ready, you can apply in a few minutes; the photo is one of five things you upload, and our companion photo requirements guide for US citizens covers the at-home setup card by card.
Start with the mechanical specs, because they are the easy half. The form accepts a square image, so a 600×600-pixel JPEG is the safe target — it clears the resolution floor and the squared aspect ratio at the same time. Here is what each spec means in practice.
Aim for a square photo, at least 600×600 pixels. That maps to the standard 4×6 cm passport-style print at a comfortable resolution, but you never print it — the Cambodia eVisa is fully digital. If your shot is rectangular, crop it to a square in your phone's Photos app so your head sits centered with a little headroom above and a little space at the shoulders. Anything under 600 pixels on the short side is the most common resolution flag, and it usually happens when a photo has been forwarded through a messaging app that compresses it. Use the original file, not a re-shared copy.
JPEG, under 2 MB. This is the format trap for Americans on iPhones: by default, recent iPhones save photos as HEIC, not JPEG, and the upload form expects a JPEG. Either switch your camera setting to "Most Compatible" before you shoot, or convert the finished photo to JPEG afterward. Android phones generally save JPEG out of the box, so the format is rarely an issue there. Modern phone photos can run larger than 2 MB at full resolution, so a square crop or a light compression usually brings the file comfortably under the ceiling.
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If you want the deeper file mechanics — millimeters to inches, JPEG versus HEIC, and exactly how to compress an oversized image without wrecking the quality — our photo size and file format breakdown walks through the conversions step by step. For most Americans, though, a square JPEG under 2 MB straight off the phone is all you need.

The background is the single thing that gets the most American photos flagged, and it is also the least intuitive, because the wall that looks perfectly white to your eye can read as gray, cream, or even pale blue to the upload validator. Your brain auto-corrects for color temperature; the validator does not. It measures the actual pixels, and warm indoor light turns a white wall a soft yellow that fails the check.
The rule itself is short: a plain white or off-white background, no patterns, no furniture, no other people, and no shadows behind your head. The practical challenge is hitting "true white" in your own home. Two things fix it almost every time — the right wall and the right light.
For the wall, use a clean white interior wall, a closed white door, or a white sheet or poster board pinned flat. Avoid anything cream, beige, or eggshell — those are exactly the off-white tones the validator reads as gray. For the light, shoot in daylight, not under warm lamps. Stand a foot and a half from the wall so your body does not cast a shadow onto it, and face a window so the light comes from the front or the side rather than from behind you. Mid-morning or mid-afternoon gives the cleanest white. Evening lamps are the most common reason an American photo comes back with a "background not uniform" flag.
One more background trap: standing too close to the wall. A head shadow on the wall behind you reads as a second tone and fails the uniform-background check just as surely as a colored wall does. Step forward, soften the light, and the shadow disappears.

The upload form runs an automatic check on your photo before submission, and the same handful of issues account for nearly every flag on US applications. The photo is just one of the broader reasons a Cambodia eVisa gets rejected, but it is the most common, and none of these are hard to avoid once you know the list — they just need a second look before you hit upload.
If a photo does get flagged, it is not a denial and it is not the end of your application — you simply re-upload a corrected version, at no extra charge, and the clock keeps running. Our guide to fixing a rejected Cambodia eVisa photo walks through each flag and the exact correction, and the photo sits alongside your passport scan and email inside the full required documents list for Americans if you want to see where it fits in the bigger application picture.

A phone camera and a plain white wall is the setup most American applicants use, and it produces a clean compliant photo every time when you follow a short routine. No booth, no print, no paid service — five minutes at a sunny window does it.
Find a true white wall, a closed white door, or a white sheet pinned flat. Stand about a foot and a half from it, not pressed against it, so there are no shadows behind your head. Face a window where daylight comes in from the side or front, not directly behind you, so your face is lit evenly and the wall stays white. Mid-morning or mid-afternoon is best; avoid evenings, when warm indoor light turns a white wall yellow.
Use the rear camera, not the selfie camera, and hold the phone in portrait orientation at eye level. Get someone else to press the shutter if you can — arm's-length selfies distort facial proportions and the validator catches that. Look straight at the lens with a relaxed, neutral expression. Take the glasses off, remove any hat, and tuck your hair behind your ears if it covers your face. Shoot five or six frames and pick the best one.
Then crop to a square in the Photos app so your head is centered with a little headroom, confirm the file is a JPEG under 2 MB, and you are done. Do not run it through a filter or beauty mode — the validator looks for natural skin texture and rejects heavily processed photos. iPhone users: this is the moment to convert HEIC to JPEG if you did not change the camera setting first.

Most American applicants fit the standard photo box cleanly. A few situations need a second of thought before you shoot, mostly around children and the no-glasses rule.
Children and infants each need their own Cambodia eVisa under their own passport, which means their own photo to the same spec — white background, neutral expression, full face visible, no smile. Yes, that includes a no-smile photo of a six-month-old, which is genuinely the hardest shot in any family application. Lay the baby on a plain white sheet and shoot straight down from above; the sheet becomes the background and the angle keeps shadows off. Eyes open is the goal, but a calm, neutral expression is what the check is really after.
Glasses come off for everyone, full stop — even prescription lenses worn all day. There is no medical exception in the spec, so take them off, shoot the photo, and put them back on. If you wear a head covering daily for religious reasons, that is allowed, but your full face has to be visible from the top of the forehead to the chin, with no shadow across the eyes.
A few smaller things people ask about: uniforms and white shirts are fine as long as they do not blend into the white background and erase your shoulder line — wear a darker top if you can. Earrings and everyday jewelry are fine. Visible hearing aids and medical devices are fine. The check is about a clear, recent, unobstructed view of your face on a uniform white background, nothing more.
The photo is the one field worth a careful second look before you submit, because it is the field most likely to send a file back. Spend the extra two minutes: true white wall, daylight, neutral face, glasses off, square JPEG under 2 MB, and confirm it is not a stray HEIC. Get those right and the photo clears on the first pass.
Once the photo is sorted, the rest of the eVisa is light. Tourist eVisa is $80 USD all-in, Business eVisa is $90 USD all-in, both approved in 3 business days and delivered as a printable PDF by email, both with free resubmission if Immigration flags a correction, and both backed by US-timezone support. There is no return flight, hotel booking, or bank statement to upload — the photo and your passport scan do most of the work.
Next steps and related reading for Americans: apply for your Cambodia eVisa when your photo is ready, skim the full required documents list for Americans to see the other four items, and bookmark our Cambodia visa hub for US citizens as the single reference for cost, documents, and timing.