Compress HEIC Images for TikTok
TikTok's slideshow feature supports up to 35 images per post. Properly optimized vertical images fill the full screen and create an immersive, high-quality viewing experience. 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 TikTok — target under 25,000KB for optimal performance. Processing is fully browser-based — no server uploads.
Recommended format
JPEG
Max file size
25,000KB
Dimensions
1080×1920 (9:16 vertical full-screen), 1080×1080 (square)
✓TikTok slideshows support up to 35 images per post
✓Vertical 9:16 format fills the full screen for maximum impact
✓Keep each image under 10MB for smooth, fast uploads
✓Use high-contrast, visually striking images to stop the scroll
Compress HEIC for Other Platforms
Compress HEIC for TikTok — FAQ
TikTok works best with images under 25,000KB. Recommended dimensions: 1080×1920 (9:16 vertical full-screen), 1080×1080 (square). ImageSmith can compress HEIC images to any target size in seconds.
TikTok primarily supports JPEG, PNG, WEBP. Converting to JPEG is recommended for best compatibility.
Upload your HEIC image to ImageSmith, set a target size under 25,000KB, and compress. TikTok slideshows support up to 35 images per post
TikTok supports JPEG, PNG, and WebP. For slideshows, use 1080×1920 vertical images. Each image can be up to 25MB, but keeping files under 5MB improves upload speed.
The 9:16 vertical ratio (1080×1920 pixels) is ideal for TikTok as it fills the entire phone screen. Square (1:1) images also work but leave black bars at the top and bottom.