Imresizer Logo

Perspective Crop for Documents

Straighten a skewed photo of a document, note, receipt, or book page. Perspective crop finds the four corners automatically and flattens the page into a clean, straight-on scan.

Advertisement

Please select an image to get started (0/12)

Or drag & drop images in this page

JPGJPEGPNGWEBPPDFHEIC

Or try with sample images:

100% Free & no login required. Your images never leave your device.

How It Works

Step-by-step guide to straighten a skewed photo of a document, note, receipt, or book page. perspective crop finds the four corners automatically and flattens the page into a clean, straight-on scan.

Upload Your Photo

Select a JPG, PNG, or WebP photo of a document, note, receipt, or book page from your device. No account or sign-up required.

Adjust the Detected Corners

The four corners of the page are found automatically. Drag any corner handle to correct it if the edge was faint or the background was busy.

Download Your Flattened Page

The page warps flat into a straight-on rectangle instantly in your browser. Download the result — nothing was uploaded or stored on a server.

Advertisement

Why Choose Imresizer?

Fast, secure, and completely free image resizing

  • Auto Corner Detection

    Point your camera at a page and the tool finds its four corners on its own — no tracing, no guesswork.

  • Built for Documents

    Contracts, forms, receipts, and handwritten notes — this mode is tuned to find flat rectangular pages, not people or products.

  • Great for Book Pages

    Photograph a curved or angled book page and get back a flat, readable rectangle instead of a warped photo.

  • Private — Nothing Uploaded

    The corner detection and the warp both run in your browser. Your document never leaves your device.

  • 100% Free

    No account, no watermarks, no hidden limits.

  • Works on Any Device

    Straighten a photo taken on your phone, then finish on your phone too — no desktop required.

Related Image Tools

Explore more powerful image editing tools to enhance your workflow

Circle Crop

Crop your image into a perfect circle for avatars and profiles.

Try now

Passport Photo Crop

Crop to standard passport dimensions for any country.

Try now

Free Crop Tool

Drag any rectangle on your image — no aspect ratio lock or preset.

Try now
Testimonials

What Our Users Say

Trusted by thousands of users worldwide since 2015

“
So fast and simple — cropped my image in seconds without installing anything.
“
Love that nothing is uploaded to a server. My photos stay private.
“
Works perfectly on my phone. No app needed.
“
Free, no watermark, no sign-up. Exactly what I needed.

Frequently Asked Questions

Everything you need to know about image resizing

How do I straighten a photo of a document?

Upload the photo and the tool detects the page's four corners automatically. Drag any corner if it needs adjusting, then the page warps flat into a straight-on rectangle you can download.

Can perspective crop fix a photo of a book page?

Yes. Book pages photographed at an angle, including slightly curved pages near the spine, get flattened into a clean rectangle so the text reads straight instead of tilted.

What if the corner detection misses an edge?

Drag any of the four corner handles to fine-tune the detected outline before you flatten the page. This matters on receipts with faded edges or notes photographed against a busy background.

How is perspective crop different from a regular crop?

A regular crop only trims straight edges off a rectangle. Perspective crop corrects keystone distortion — it warps a skewed, off-angle photo of a flat page into a proper straight-on rectangle, similar to a flatbed scan.

Does cropping reduce image quality?

No. Cropping removes pixels outside the selected area but does not compress or alter the remaining image quality.

Are my images private?

Yes, 100% private. All cropping happens entirely in your browser — your images never leave your device or reach any server.

What image formats are supported?

You can crop JPG, PNG, and WebP images. The output is downloaded in the same format as your original file.

Is this tool free to use?

Yes, completely free. No account, no watermarks, no hidden limits. Crop as many images as you need.

Does it work on mobile?

Yes. The tool works on any modern browser — phone, tablet, or desktop. No app installation required.
Advertisement