Make a hidden 3D image
Turn a word or shape into a hidden 3D picture. Choose a pattern, adjust the depth, and download your PNG.
First time here? — see a hidden heart right away. Your own settings are kept.
Up to 8 letters — short words like HI or LOVE pop the sharpest. Depth is automatically limited in Secret Message mode.
A ready-made gift message with fixed lettering — the heart is drawn as a shape, not an emoji. Depth is automatically limited, same as a typed message.
Exactly two letters A–Z. They appear inside the heart.
Higher depth pops out more but is harder to lock onto. 18–26 is a good range for beginners.
Depth is fixed at 24 in Shape + Message.
Changes not applied
Update the stereogram to use your new settings.
First time here? — a tuned heart, no setup needed. Your own settings are kept.
You’re viewing the tuned example — a hidden heart
Hold the screen at arm’s length and look through it, as if focusing on something behind the display. When two neighbouring pattern columns fuse, the heart floats up in 3D. Your own settings are kept — nothing was lost.
- Pattern
- Confetti
- Depth
- 22 px
- Subject
- Hidden Shape · Heart
- Export
- 2400 px · local
Two print-ready pages made locally from the image currently shown: a puzzle page and a separate answer page.
Downloads the image currently shown.
Trouble seeing it? Learn the viewing technique →Preview the hidden subject (spoiler)
Quick start
Three steps to a hidden 3D image
Choose a subject
Type a short word or pick one of the fifteen preset shapes. This becomes the invisible depth map — the thing that will float out of the pattern.
Pick pattern & depth
Select one of the eight repeating textures and set how strongly the subject should pop. The generator renders a true single-image stereogram on canvas.
Relax your eyes
Look through the screen, not at it. When two neighbouring pattern columns fuse, the hidden shape snaps into 3D. Then download your PNG.
Go deeper
Learn the craft behind the illusion
How to view stereograms
The parallel-viewing technique explained step by step, with practice drills, common mistakes, and tips for stubborn eyes.
Read the guide →The science of autostereograms
Binocular vision, the correspondence problem, and how a repeating pattern plus tiny horizontal shifts fools your visual system.
Explore the science →Stereogram gallery
A set of ready-made hidden 3D exhibits rendered live in your browser — each with a "reveal the answer" option if you get stuck.
Open the gallery →Common questions
Quick answers
Why can't I see the hidden image?
Most first-timers focus on the screen instead of behind it. Sit at arm's length, relax your gaze as if looking at something a metre past the display, and wait for two repeats of the pattern to drift together. Our viewing guide walks through it with practice exercises.
Is my text or image uploaded anywhere?
No. The whole generator runs in your browser using the HTML5 Canvas API. Your text, the depth map, and the finished stereogram never leave your device. See our privacy policy for details.
Can I use the images I make?
Yes — stereograms you generate here are yours to keep and share for personal and non-commercial use, such as puzzles, greeting cards, classroom demos, or social posts. More usage questions are answered in the full FAQ.