CardScopeFree tool
Open Graph image resizer
Drop a picture or choose a file. Drag it until the 1200×630 crop looks right, then download a PNG or JPEG. This runs in your browser. The image is not uploaded and it is not stored.
Drag the picture. The dashed box is the center 85%. Keep logos and words inside it.
Download
PNG keeps text and flat colors sharp. JPEG is smaller for photos. The file is 1200×630 and stays under 5 MB. X documents a 5 MB limit for card images.
1200×630. Choose an image to see the file size.
Next
The file is on your computer. Host it at an https URL, write the tags, then check the live page.
Size notes are in the OG image size guide. Format notes are in the OG image format guide.