Resize an Image for Facebook Post Image
1200 × 630 pixels — the exact size Facebook Post Image expects.
The dimensions
1200 × 630 pixels, an aspect ratio of about 1.90:1. A link shared to Facebook is rendered as a link preview card at 1.91:1, which is the same ratio as this post image size.
Crop, and what you will lose
A standalone photo upload is displayed taller than a link card, so a portrait image gets more feed height than a 1200 × 630 one — the 1.91:1 frame is the safe choice when the same file has to work as both.
Feed crops are not the size you upload
In the mobile feed a rectangular image is cropped to roughly a square before a viewer taps it. In the desktop feed the same file is shown at a wider ratio. An image whose subject sits in the middle of a 1200 × 630 frame survives both; one with a subject at the edge loses it on one of the two. If the post is a photo rather than a link, a portrait upload is displayed taller and avoids the square crop entirely.
How to crop it here
Selecting cover scales your image uniformly until it fills the 1200 × 630 rectangle, then trims the overflow from the centre. Contain would leave empty bands instead, which is wrong for an image meant to fill a frame, and stretch would distort faces.
Why this runs in your browser
The file is read from your disk by the browser, decoded with the browser's own codecs, and re-encoded in this tab. No upload request is made, nothing is queued on a server, and closing the tab leaves no copy anywhere. You can verify this in the network panel while it works.
How to use it
- Drop the image on the drop zone.
- Choose the Facebook Post Image preset, or type 1200 and 630 directly.
- Set cover mode so the frame is filled without distortion.
- Check the crop keeps the subject centred, then download.
Worth knowing
- Target dimensions are 1200 × 630 pixels, ratio 1.90:1.
- Used for in-feed post images.
- Cover fills the frame and crops the overflow; contain letterboxes instead.
- Aspect ratio is preserved in every mode except stretch.
Limitations
- Cropping is from the centre — frame the photo before uploading if the subject is off-centre.
- Upscaling beyond the original size adds no detail.
- Very small sources will look soft at 1200 pixels wide.
- Platforms change their internal dimensions without notice; these are current published figures.