Compress HEIC Images for YouTube
YouTube thumbnails are the single most impactful factor in video click-through rate. Compressed, well-sized thumbnails load quickly and display crisply across all devices. High Efficiency Image Format — the default photo format on iPhones and modern Apple devices. Excellent compression. Use ImageSmith to compress your HEIC images to the ideal file size for YouTube — target under 2,048KB for optimal performance. Processing is fully browser-based — no server uploads.
Recommended format
JPEG
Max file size
2,048KB
Dimensions
1280×720 (thumbnails), 2560×1440 (channel art)
✓Custom thumbnails must be under 2MB file size
✓Use 1280×720 pixels — displayed at various sizes across devices
✓High contrast with bold, readable text increases click-through rate
✓Bright, saturated colors stand out in recommendation feeds
Compress HEIC for Other Platforms
Compress HEIC for YouTube — FAQ
YouTube works best with images under 2,048KB. Recommended dimensions: 1280×720 (thumbnails), 2560×1440 (channel art). ImageSmith can compress HEIC images to any target size in seconds.
YouTube primarily supports JPEG, PNG, GIF, BMP. Converting to JPEG is recommended for best compatibility.
Upload your HEIC image to ImageSmith, set a target size under 2,048KB, and compress. Custom thumbnails must be under 2MB file size
YouTube thumbnails must be under 2MB. Use 1280×720 pixels in JPEG or PNG format. High-contrast thumbnails with readable text consistently achieve higher click-through rates.
YouTube channel art should be 2560×1440 pixels. The safe area that displays on all devices is the center 1546×423 pixels. Keep the total file under 6MB.