Instagram Image Resizer
Resize
The classic 1:1 feed post.
Saves your edited image at its current dimensions, keeping the original file format. The canvas shows exactly what downloads.
Your images are processed locally in your browser and never uploaded to any server.
Instagram hard-caps uploads at 1080px on the long edge and centers unexpected aspect ratios behind letterboxing. Pick the right preset here (square, portrait, landscape, or story) and your image arrives exactly as composed, with zero quality lost to the platform's own resampling.
How to use the instagram image resizer
- Upload the photo you want to post.
- Choose a preset: 1:1 square (1080×1080) or 4:5 portrait (1080×1350) for feed posts, 9:16 (1080×1920) for stories.
- Crop to fill keeps the exact preset dimensions by center-cropping any overflow; switch to fit inside if you would rather keep the whole frame.
- Download and upload straight to Instagram.
Frequently asked questions
What is the best Instagram post size?
1080×1350 (4:5 portrait) takes up the most screen in the feed and consistently outperforms squares for engagement; 1080×1080 remains the safe classic. Anything you upload gets downscaled to 1080px wide. Larger files just take longer to upload.
Does Instagram compress my photos anyway?
Yes, Instagram re-encodes every upload to roughly 1440px maximum and applies its own compression. Starting from an exact, correctly-sized image minimizes the damage. Double compression (yours, then theirs) is what makes photos look mushy.
What aspect ratio do stories need?
9:16 at 1080×1920. Anything else gets pillarboxed with bars. Leave breathing room at the top and bottom ~250px for the profile label and reply field overlays.
Learn more
- Social Media Image Sizes (2026 Reference)
The complete 2026 social media image size reference: Instagram, Facebook, YouTube, TikTok, LinkedIn, Pinterest and X (posts, stories, covers and profile pictures).