Redimensionner une Image
Redimensionner images to exact dimensions or by percentage. Gratuit, in-browser, no upload.
Drop an image or parcourir les fichiers
What is an image resizer?
An image resizer changes the pixel dimensions of a picture — making it larger or smaller, to exact width and height values, or by a percentage of its original size. Resizing is essential when an image is too big for a web page, needs to fit a specific social media dimension like 1080×1080, or should be scaled down before uploading to a service with file limits. Unlike cropping, resizing keeps the whole image and typically scales the width and height together so nothing is cut off.
This free online image resizer lets you enter a new width, a new height, a scaling percentage, or any combination of the three — leave fields empty and the tool keeps the aspect ratio for you automatically. Output is available as JPG, PNG, or WebP. Everything runs locally in your browser with the canvas API, so your images are never uploaded: change image dimensions in seconds, with no signup and no watermark.
Comment faire use the image resizer
- Drop an image onto the box above, or click browse to pick a file.
- Enter the target width and height in pixels, or a percentage — fill in only one box to keep the aspect ratio automatically.
- Pick JPG, PNG, or WebP as the output format, click Redimensionner, and download the resized image.
Frequently asked questions
Can I resize an image by percentage?
Yes — enter a percentage such as 50 to scale the image down to half its size, or 200 to double it. The width and height are both scaled by the same factor.
Does resizing keep the aspect ratio?
Yes. If you enter only a width or only a height, the other dimension is calculated automatically so the image is never stretched. Enter both values if you want an exact size, even at the cost of distortion.
Will resizing make my image blurry?
Enlarging an image always softens it because the tool must invent pixels that were never captured. Shrinking an image keeps it sharp and usually improves perceived quality by removing noise.
What formats can I export?
JPG, PNG, and WebP. Choose JPG for the smallest files, PNG when you need transparency, and WebP for the best modern web compression.