Resize Image
Scale an image to the width and height you need, in pixels, with an option to lock the aspect ratio so nothing is stretched. Furtu resamples with high-quality smoothing, which keeps edges clean when you scale down — the operation marketplaces and CMSs ask for most often.
With Keep aspect ratio on, fill in one dimension and the other is calculated for you. Fill in both and the image is scaled to fit inside the box without changing its proportions.
Set to 0 to work from the width alone. Turn Keep aspect ratio off to force both numbers exactly.
On, the missing dimension is derived from the image so the result is never distorted. Off, the image is forced to exactly the width and height you typed.
How resize image works
- Add your imagesDrop in the files you want to resize, or browse your device. Each one is validated before it is decoded.
- Set the dimensionsEnter a width and a height in pixels. Leave one at zero, or lock the aspect ratio, and Furtu derives the other value from the image.
- Download the resized filesEach image is resampled and re-encoded on your device, and the result is shown with its new dimensions.
What you get
Set an image to exact pixel dimensions for a listing, an upload or a banner. Everything happens inside this page: the file is read by your browser, transformed in memory and handed straight back to you as a download. There is no upload queue, no waiting for a server, and nothing left behind when you close the tab.
Supported formats
Furtu accepts .jpg, .jpeg, .png, .webp, .avif, .gif, .bmp, .svg, .ico, .heic, .heif files up to 100 MB each, and processes up to 20 files in one run.
- Every file is checked against its real file signature, not just its name, so a renamed or corrupt file is rejected with an explanation instead of failing halfway through.
- Files over the limit are refused up front rather than after a long wait.
Limitations, stated up front
- Enlarging an image past its own resolution produces a soft result. The pixels are interpolated, not recovered.
- Forcing both width and height with Keep aspect ratio off will distort the picture if the proportions differ from the original.
- Resizing always re-encodes the file, so lossy formats lose a little quality on the way. PNG is re-encoded losslessly and keeps hard edges exactly.
- SVG and animated GIF are not supported: a canvas cannot re-encode vector art or animation. Both are rejected with an explanation.
Frequently asked questions
Does resizing blur the image?
Scaling down uses high-quality smoothing, so a photo reduced from 4000 pixels to 1200 looks clean rather than blocky. Scaling up cannot invent detail that is not there: an image enlarged beyond its own resolution will look soft, which is why enlarging is usually a mistake.
How do I set only the width?
Fill in the width and leave the height at 0 with Keep aspect ratio on. Furtu calculates the height from the image’s own proportions, so a 3000×2000 photo at 1200 pixels wide comes out as 1200×800.
Does the metadata survive?
The pixels do, and the EXIF does not. A canvas cannot copy camera data across to a new file, so writing a resized image produces a clean file without GPS coordinates, camera model or timestamps. That is usually welcome, and it is worth knowing if you were relying on that data.
Can I resize a batch of images to one size?
Yes. Add up to 20 images and the same dimensions are applied to each, which is what you want for a product catalogue or a gallery. Turn Keep aspect ratio off only when every image already has the same proportions.
Are the images uploaded to be resized?
No. The pixels are decoded, resampled and re-encoded inside your browser. Nothing is sent to a server, so resizing a set of unreleased product photos or a private document leaves no trace anywhere but your own device.