Sources, not guesses
Image size dataset
This small dataset records dimensions from the platforms that publish them. Each entry links to its source and carries a verification date. Use it to prepare an image, not to guarantee that a platform will approve its content or preserve its crop.
There are currently no verified passport-country records. Digital uploads and printed passport photos have different requirements, and matching pixel dimensions is not a compliance test. In particular, UK digital passport guidance says not to crop a photo taken on your own device. We intentionally leave unsupported records out rather than filling a country table with guesses.
| Use | Dimensions | Byte cap used | Verified | Source |
|---|---|---|---|---|
| LinkedIn profile | 400 x 400 | 8,000,000 bytes | 2026-10-24 | Official documentation |
| LinkedIn background | 1584 x 396 | 8,000,000 bytes | 2026-10-24 | Official documentation |
| YouTube video thumbnail | 3840 x 2160 | 1,999,000 bytes | 2026-10-24 | Official documentation |
LinkedIn profile: 400 x 400 is the documented minimum profile dimension, not the only allowed size. Maximum file size is 8 MB; use JPG or PNG and verify the crop after uploading.
LinkedIn background: LinkedIn recommends 1584 x 396 pixels. This is a dimension diagram, not a verified safe-zone map; inspect the desktop and mobile crop before publishing.
YouTube video thumbnail: The current official recommendation is 3840 x 2160 for video. Mobile uploads have a 2 MB cap, desktop 50 MB. This preset uses a conservative mobile byte cap; Shorts have separate rules.
Check an image locally
The checker below compares file size and pixels only. It does not upload the picture, identify a face, detect policy violations, or certify acceptance. Use the photo resizer to create a separate copy, then inspect it on the destination platform.
Reuse and corrections
The original dataset arrangement and notes are available under CC BY 4.0. Attribute Motionix, link to this page, and retain the verification date. Linked official documentation remains the property of its respective publishers. These records can become outdated; check the source before relying on a limit.
To report a change, send the affected platform, a current official link, and what differs through the contact page. Updates should cite evidence rather than estimates. A suggested email-logo size is an editorial recommendation and is therefore not presented in this official-platform table.
Embed the checker
<iframe src="https://motionix.xyz/embed/photo-size" title="Image size checker" width="100%" height="430" loading="lazy"></iframe>