LINE VOOM Image Size Guide — Posts and Cover
LINE VOOM uses 9:16 vertical media. Learn the exact post, cover, and thumbnail sizes and resize one image for VOOM in seconds.
LINE VOOM (rebranded from LINE Timeline in 2021) is the short-video and vertical-media feed inside the LINE app, and it is optimized around 9:16 (1080×1920) the way TikTok and Instagram Reels are. Square 1:1 and 4:5 posts still render, but they burn screen real estate and consistently underperform vertical 9:16 content. This guide lists every LINE VOOM image size, including the cover photo, and shows how to pre-crop with ShareMint so your subject sits inside the visible area no matter how the VOOM player resizes.
| Placement | Size (px) | Notes |
|---|---|---|
| Vertical post (main) | 1080 × 1920 | 9:16 — phone portrait native |
| Square post | 1080 × 1080 | 1:1 — less feed real estate |
| 4:5 post | 1080 × 1350 | Alt portrait ratio |
| Cover photo | 1080 × 1920 | 9:16 |
Steps
Know the LINE VOOM sizes
VOOM is built around 9:16 vertical content (1080x1920). Cover photos use 1080x1920 vertical. Thumbnails for clips use 9:16. Square 1:1 still works in the feed but loses screen space.
Pick the 9:16 preset
Open ShareMint and select the LINE VOOM 9:16 (1080x1920) preset. This matches the native VOOM display ratio.
Set a focal point on the subject
VOOM auto-plays clips, but for image posts the focal point keeps faces and product hotspots safely inside the visible area.
Export and post via the LINE app
Save the resized file to your phone via AirDrop / Google Drive, then upload from the LINE app's VOOM tab.
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Resize for LINE VOOMFAQ
Is VOOM only for vertical content?
It is optimized for 9:16, but the feed accepts 1:1 and 4:5 too. Vertical 9:16 dominates because it matches how users hold their phone.
What about LINE Timeline vs VOOM?
LINE Timeline was rebranded to VOOM in 2021. The image specs are aligned with vertical short-video platforms.
Does VOOM support animated GIFs?
GIFs are converted to short videos on upload. For best clarity, export as MP4 or use a static high-quality JPEG/WebP image.
Can I add a watermark to my VOOM posts?
Yes — ShareMint's Pro plan adds text, logo, or QR code watermarks before export, so your posts always credit you when re-shared.