Free browser image tool
Resize Image for Instagram Post Online
Resize an image to common Instagram post dimensions such as 1080 × 1080 or 1080 × 1350 pixels.
Setup: Use 1080 × 1080 for a square post or 1080 × 1350 for a portrait post. The tool resizes; it does not intelligently crop.
Your image is processed in your browser. No login is required.
What this page does
This landing page turns the general image resizer into a clear Instagram preparation workflow. Square and portrait presets are entered manually so you retain control over distortion and aspect ratio.
How to use Resize Image for Instagram Post
- Upload the image.
- Enter 1080 × 1080 for square or 1080 × 1350 for portrait.
- Keep aspect ratio when possible; crop externally first if the source ratio does not match.
- Resize and download the PNG, then preview it in the Instagram composer.
Good uses
- Square feed graphics
- Portrait feed posts using a 4:5 frame
- Standardizing campaign images before posting
How to verify the result
- Preview the full image in Instagram before publishing.
- Check that text and faces are not stretched.
- Keep important content away from the outer edge.
Known limitations
- Platform recommendations can change.
- The tool does not crop or add padding automatically.
- PNG output may be larger than a compressed JPEG upload.
Examples
- Resize a square quote graphic to 1080 × 1080.
- Prepare a portrait product image at 1080 × 1350.
- Standardize carousel cards before adding them to a design tool.
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