Compress HEIC Images for Squarespace
Squarespace websites are visually driven — large, beautiful images are central to the design. Properly compressed images maintain visual quality while dramatically improving page load speed. 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 Squarespace — target under 20,000KB for optimal performance. Processing is fully browser-based — no server uploads, no privacy risk.
Recommended format
JPEG
Max file size
20,000KB
Dimensions
2500px max width for full-bleed sections
✓Upload JPEG at quality 80–85 for optimal quality-to-size ratio
✓Squarespace uses 2500px as the display maximum — match this for full-bleed images
✓Optimize all gallery images before upload to reduce page weight
✓PNG for logos with transparent backgrounds