Reverse-shredder · real reconstruction

Put the page
back together.from the pieces.

Feed it any image. UNSHRED slices it into strips, throws away the order, and scatters them. Then a real algorithm — matching torn edges pixel by pixel — rebuilds it, and the original flies back together in front of you.

Start reconstructing
Scroll to feed the machine

The machine

Drop an image, snap a photo, or use the sample page. Everything happens on your device — nothing is uploaded.

Drop an image here or click to browse — JPG, PNG, photos of documents

18

How it actually works

This isn't a fake animation playing a saved order backwards. The solver genuinely reconstructs the image without ever being told how the strips originally lined up.

01

Slice

Your image is cut into vertical strips (or a confetti grid). Each strip becomes its own textured panel floating in 3D.

02

Scramble

The order is thrown away and the strips scatter and tumble into a glowing void. All the machine keeps is the pixels.

03

Match edges

For every pair of strips it compares the pixel column on one torn edge against the other and scores how well they'd continue. Best matches win.

04

Rebuild

It chains the strips into the most likely order and they fly home — the page reforms in front of you, seams re-aligned.

Straight talk

Strip-cut reconstruction from a clean image is real and works well — you'll see the seam-accuracy score the solver earned. Reconstructing an actual pile of physically shredded paper from a phone photo is a research-grade problem (DARPA ran a $50k contest on it), so this focuses on the version that genuinely delivers. Cross-cut mode is a spectacle: it reassembles from the known layout, because 2D confetti reconstruction is a much harder puzzle.

StandbyFeed the machine
seams matched
rebuilt