How the AI image extender works
- Drop a photo above and choose the shape you need: 1:1, 4:5, 3:4, 2:3, 9:16, 4:3, 3:2, 16:9 or 21:9.
- The dashed frame shows where new content will go. Your photo sits in the middle at its original size.
- Run it. The AI paints the empty margins as a continuation of the scene: the same light, perspective and texture.
- Compare the original and the result with the slider, then download a JPG at the exact ratio, about 2K on the long side.
When the result comes back, the page pastes your original photo back over the middle with a soft edge. Image models sometimes redraw small details, such as a face or a sign, while they work; pasting the original back means the part you shot is never changed, only the new margins are generated.
Extend, crop or pad?
| Method | What you get | Best for |
|---|---|---|
| Crop | Part of the photo, exact shape | Plenty of room around the subject |
| Pad with blur or color | The whole photo plus plain bars | Graphics, screenshots, quick posts |
| AI extend | The whole photo plus invented scenery | Photos where cropping would cut someone off |
Cropping and padding are free and run in your browser: use the crop tool or Fit whole image on any size page. Use the extender when neither works, for example a group photo that has to become a 9:16 Story without cutting off the people at the ends.
What the extender is good at
- Skies, water, sand, grass, walls, studio backdrops. Simple, repeating backgrounds extend almost invisibly.
- Landscape to portrait for Stories, Reels and TikTok. Turning 16:9 into 9:16 more than triples the frame, so start from a photo with a calm background above and below the subject.
- Portrait to landscape for YouTube thumbnails, banners and slides. A vertical phone photo becomes a 16:9 frame with the subject still centered.
- Making room for text. Extend a tight product shot so there's empty space for a headline.
When it struggles
- Cut-off people or objects at the edge. If half a person is in the frame, the AI has to invent the other half, and it may get hands, limbs or faces wrong. Check the edges closely.
- Text, logos and patterns that continue past the edge rarely come out right.
- Very big extensions. Going from 21:9 to 9:16 asks the AI to invent most of the picture. Results look better when the new area is smaller than the original.
If a result isn't right, run it again: each run comes out differently. A failed run is refunded automatically.
Size and quality
The result is around 2K on its long side (for example about 2048 × 1152 for 16:9), which is enough for every social platform. For a sharper or larger file, run the result through the AI upscaler. For an exact pixel size such as 1080 × 1920, open the matching size page afterwards; the shape already matches, so nothing gets cropped.
Cost and privacy
Each run costs 5 credits and needs a free account; failed runs are refunded automatically. Unlike CropDen's other tools, this one can't run in your browser: the photo is sent to our AI provider, kie.ai, which deletes the upload after 24 hours and the result after 14 days. CropDen doesn't keep or reuse your images.
