1080 × 1920 pixels, 9:16. See where the profile strip and reply bar cover your Story, check an image, and download the template. Free, no login.
1080 × 1920 pixels at 9:16. Photos and videos are both this size; a video Story can be up to 60 seconds.
Your profile picture and the progress bar at the top, and the reply bar at the bottom — roughly 250 pixels each on a 1080 × 1920 Story. Keep text and stickers between them; the checker marks both.
Yes, Instagram adds a blurred or coloured background around it. Cropping it to 9:16 yourself, as the export here does, looks better and lets you choose what's in frame.
No. Everything runs in your browser. Nothing is sent to Hookova.
JPG or PNG up to 30 MB for photos; MP4 or MOV up to 4 GB for video. Instagram recompresses everything, so start at exactly 1080 × 1920.