↔️ Image Resizer

Resize images to exact pixel dimensions or percentages. Supports JPEG, PNG, WebP, and GIF. Free online image resizer — runs in browser, no uploads to any server.

Drop image here or click to upload

PNG, JPG, WebP supported

How to Use

Upload your image

Drag and drop any image or click to browse. Original width and height are filled in automatically.

Set new dimensions

Enter target width or height in pixels. Toggle the lock icon to keep the original aspect ratio.

Download resized image

Choose output format (PNG/JPEG/WebP) and quality level, then click Resize and Download.

Frequently Asked Questions

Can I resize without losing quality? +

Enlarging an image always reduces sharpness because you are adding pixels that did not exist. Shrinking an image generally preserves quality well. For best results when enlarging, use a dedicated AI upscaler.

What does "lock aspect ratio" mean? +

When aspect ratio is locked, changing the width automatically recalculates the height (and vice versa) to keep the image proportions the same. This prevents stretching or squishing.

What output formats are supported? +

You can save the resized image as PNG (lossless), JPEG (smaller file, adjustable quality), or WebP (best compression with good quality). WebP is recommended for web use.

Is there a maximum image size? +

There is no hard limit, but very large images (over 10,000×10,000 pixels) may cause the browser to run slowly. The tool processes everything locally without any server.

Is my image sent to a server? +

No. The entire resize operation runs in your browser using the HTML5 Canvas API. Your image never leaves your device.

Guide : Redimensionnement d'Images

Qu'est-ce que c'est ?

L'outil de Redimensionnement d'Images permet de modifier les dimensions des images PNG, JPG et WebP directement dans le navigateur, avec option de maintien du ratio d'aspect.

Parfait pour préparer les images aux dimensions exactes requises par les plateformes (bannières, avatars, images produit e-commerce).

Comment utiliser

Téléchargez votre image source.
Entrez la largeur et/ou hauteur cible en pixels.
Activez "Maintenir le ratio" pour éviter la déformation.
Téléchargez l'image redimensionnée.

Conseils professionnels

N'agrandissez pas les images raster — cela crée du flou. Utilisez SVG pour les éléments devant être scalables.
Redimensionnez avant de compresser pour le meilleur résultat final.