Crop HEIC Images to 21:9 (Ultrawide / Cinematic)
The 21:9 Ultrawide / Cinematic ratio is used for: ultrawide wallpapers, cinematic banners, gaming headers, premium hero sections. Ultrawide cinematic ratio used for ultrawide monitor wallpapers, cinematic cover photos, and premium website hero sections with dramatic horizontal depth. When preparing HEIC images in 21:9 format, optimize file size alongside the crop — ImageSmith compresses your HEIC to the perfect size for any platform. Common 21:9 dimensions: 2560×1080, 3440×1440, 5120×2160.
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Aspect Ratio
21:9
Name
Ultrawide / Cinematic
Format
HEIC
Example size
2560×1080, 3440×1440, 5120×2160
▸ultrawide wallpapers
▸cinematic banners
▸gaming headers
▸premium hero sections
Reduce file size too?
Compress your HEIC — instant, browser-based, free.
Other HEIC Aspect Ratios
Crop HEIC to 21:9 — FAQ
Ultrawide cinematic ratio used for ultrawide monitor wallpapers, cinematic cover photos, and premium website hero sections with dramatic horizontal depth. Common use cases include: ultrawide wallpapers, cinematic banners, gaming headers, premium hero sections.
Common 21:9 dimensions include: 2560×1080, 3440×1440, 5120×2160. Choose the size that matches your target platform's requirements.
Upload your HEIC image to ImageSmith and set a target file size. The tool compresses to any size while maximizing quality — browser-only, no uploads.
HEIC works well for photographs. WebP is often 25–35% smaller for the same 21:9 image content.