Redimensionar Imagen Online
Redimensionar imágenes to exact dimensions or by percentage. Gratis, in-browser, no upload.
Drop an imagen or buscar archivos
What is an imagen resizer?
An imagen 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 imagen is too big for a web página, 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 imagen and typically scales the width and height together so nothing is cut off.
This free online imagen 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 imágenes are never uploaded: change imagen dimensions in seconds, with no signup and no watermark.
Cómo use the imagen resizer
- Drop an imagen 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 Redimensionar, and download the resized imagen.
Frequently asked questions
Can I resize an imagen by percentage?
Yes — enter a percentage such as 50 to scale the imagen 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 imagen is never stretched. Enter both values if you want an exact size, even at the cost of distortion.
Will resizing make my imagen blurry?
Enlarging an imagen always softens it because the tool must invent pixels that were never captured. Shrinking an imagen 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.