FreeAISky Replacer
Replace a dull sky
Swap a grey sky for blue, sunset or stars, with matching light.
Drop an image here, or .
Free AI that runs on your device, no sign-up. Nothing is uploaded. Only edit photos you own or have permission to edit; see our Acceptable Use Policy.
Sky Replacer: how to use it
- Drop in a landscape or building photo with sky along the top.
- Choose the New sky: blue with clouds, sunset, blue hour, starry night, soft overcast, or your own sky photo.
- Keep Match the light on the land on Yes so the scene takes on the colour of the new sky, then replace.
Tips
- A clear line between land and sky works best. Thin branches against the sky are blended but may look soft.
- If no sky is found along the top of the photo, the tool says so rather than guessing.
Sky Replacer: what it does and when to use it
The Sky Replacer uses Depth Anything V2, a model that estimates how far away each part of a photo is. The sky is the farthest thing in almost any outdoor photo, touches the top of the frame, and is bright or blue, so the tool marks the region that meets all three conditions, softens its edge so thin branches blend in, and paints a new sky into it.
Match the light on the land adds a gentle wash of the new sky's colour over the rest of the scene. Without it, a sunset above a landscape lit by grey midday light looks pasted on; with it, the warm or cool tone carries through. You can also use a sky photo of your own, which works best when it was taken at a similar time of day.
The photo needs visible sky along its top edge. Fog, haze, glass buildings reflecting the sky, and sky seen through dense leaves can confuse the mask, and a scene with strong shadows from bright sun will not match an overcast sky. Treat replaced skies as creative edits, not as a record of the weather on the day.
Sky Replacer: frequently asked questions
Is the Sky Replacer free, and do I need to sign up?
Yes, the Sky Replacer is 100% free with no sign-up, no login and no account. The Sky Replacer runs its AI model on your own device, so it has no credits, no daily limit and no upload, and saves at full resolution with no watermark. See why it is free.
How does it find the sky?
The Depth Anything model estimates how far away every part of the photo is. The sky is the most distant area that touches the top of the frame and is bright or blue enough to be sky, which is why distant hills and buildings stay in place.
Can I use my own sky photo?
Yes. Choose A sky photo of my own and add it. The land can also be tinted to match the new sky, so a sunset sky does not sit over a midday landscape. Related tool: Photo Relighter.
How do I replace a dull sky in a photo?
Open the photo and pick a new sky: clear blue, sunset or stars, or add your own sky photo. The AI finds the sky using a depth model and blends the new one in, and can tint the land to match, so a sunset sky does not sit over midday light.
Why did part of a building or tree turn into sky?
Fine details against a bright sky, such as thin branches or antennas, are the hardest part to separate. Pick a photo where the horizon is clear, or fix the edge afterwards with the Retouch Tools.