Pixels or percentage?

Pixels when you have a target spec (e.g. 'must be exactly 1200×630 for OG image'). Percentage when you're just shrinking ('half the size of the original'). Lock the aspect ratio in either mode to avoid stretched output.

Does upsizing improve quality?

No. Upsizing (e.g. 500px → 2000px) doesn't add detail; Canvas interpolates between existing pixels. The result looks blurry compared to a true 2000px source. Use this tool to shrink confidently; for upsizing, find a higher-resolution source or use an AI upscaler.

What format is the output?

Same format as the input (PNG stays PNG, JPG stays JPG). To change the format too, run the output through the image-converter tool.

Redimensionneur d'image

Redimensionnez des images en pixels ou en pourcentage dans votre navigateur - sans upload.

Fonctionne dans votre navigateur

Déposez une image, choisissez les nouvelles dimensions (pixels ou pourcentage), verrouillez le ratio pour une mise à l'échelle proportionnelle, et téléchargez. L'original n'est jamais modifié ni envoyé - la copie est générée localement via Canvas.

Déposez une image ici ou cliquez pour en choisir une

PNG, JPG, WebP, AVIF, GIF, BMP

Comment l'utiliser

Drop an image
Drag a PNG / JPG / WebP / AVIF / GIF onto the dropzone or click to pick one.
Set the new dimensions
Type pixels (lock aspect ratio for proportional scaling) or use the percentage shortcut (50%, 25%).
Download
The resized copy downloads with `-resized` appended to the filename. The original is untouched.

Qu'est-ce que c'est ?

An image resizer changes the pixel dimensions of an image - shrinking it to save bandwidth, or fitting it to a target spec. The browser's Canvas API handles the actual resampling using bilinear or bicubic interpolation depending on the engine. Quality is preserved when you shrink; upsizing can't add detail that wasn't in the source.

Quand l'utiliser

Resizing photos before uploading to a service with a max file size, fitting an image to a specific design slot (1200×630 for OG, 1080×1080 for Instagram), or batch-shrinking a screenshot for a documentation page. Anywhere you need to change pixel dimensions without round-tripping through Photoshop.

Erreurs courantes

Forgetting to lock the aspect ratio and ending up with a stretched / squashed image. Saving the same image at the same dimensions repeatedly (each save through a lossy format like JPG loses a little quality - the so-called 'generational loss'). And upsizing in the hope of recovering detail - it doesn't work; pick a higher-res source instead.

FAQ

Pixels or percentage?: Pixels when you have a target spec (e.g. 'must be exactly 1200×630 for OG image'). Percentage when you're just shrinking ('half the size of the original'). Lock the aspect ratio in either mode to avoid stretched output.
Does upsizing improve quality?: No. Upsizing (e.g. 500px → 2000px) doesn't add detail; Canvas interpolates between existing pixels. The result looks blurry compared to a true 2000px source. Use this tool to shrink confidently; for upsizing, find a higher-resolution source or use an AI upscaler.
What format is the output?: Same format as the input (PNG stays PNG, JPG stays JPG). To change the format too, run the output through the image-converter tool.

Convertisseur d'image

Convertit PNG, JPG, WebP et AVIF dans votre navigateur - sans upload, sans inscription.

Compresseur d'image

Réduit la taille de JPG et WebP avec un curseur de qualité et un aperçu avant/après en direct.

Recadreur d'image

Recadrez les images en glissant une sélection - libre ou ratios fixes (1:1, 4:3, 16:9, 9:16).