Skip to main content
Free Photo Tool

SquareUp

Perspective Correction Tool

Straighten slanted, warped, or skewed photos and documents. Drag the corner handles, watch the live preview, and download a perfectly corrected image.

100% Free Private — images never leave your browser No signup needed

How to use SquareUp

1

Upload Your Image

Drop a PNG, JPG, or WEBP file — a photo of a document, signboard, whiteboard, building, or screen.

2

Drag the Corners

Move the four blue handles so they trace the edges of the object you want to straighten.

3

Watch the Preview

The corrected output updates in real time, removing the perspective distortion from your photo.

4

Download Free

Export the straightened image as a high-quality PNG — ready for printing, sharing, or editing.

SquareUp FAQs

Is SquareUp really free?

Where are my uploaded images stored?

Which file formats are supported?

What can I use perspective correction for?