Free tools
Quick utilities that run entirely in your browser. Your images never leave your device.
Aspect ratio calculator
Ratio 16:9 (1.778)
→ height 608
- TikTok / Reels / Shorts: 1080×1920
- Instagram portrait: 1080×1350
- Square: 1080×1080
- YouTube: 1920×1080
- Pinterest: 1000×1500
- Link preview: 1200×628
Image resizer for social sizes
Need hundreds at once? The desktop Photo Studio resizes whole folders.
Watermark preview
The desktop app applies this to whole folders of photos, videos and PDFs.