Hecho localmente — no se sube nada

Redimensiona tus Fotos

Redimensiona cualquier foto a píxeles exactos o a un porcentaje — con la proporción bloqueada para que nada se deforme. Gratis, con calidad completa y 100% privado.

Suelta una foto

o haz clic para buscar — JPG, PNG o WEBP · elige varias para redimensionar un lote

Sample image, unchanged by the conversion — Exact pixels, nothing stretched — nothing uploaded

Redimensionar en tres pasos

1.Suelta una foto

Cualquier JPG, PNG o WEBP — se lee directamente en tu navegador.

2.Define el tamaño

Escribe los píxeles exactos, elige un porcentaje o ajústala a una medida. La proporción se mantiene bloqueada.

3.Descargar

Exporta JPG, PNG o WEBP en el nuevo tamaño — gratis y sin marca de agua.

Resizing well

Down is safe, up is not

Making an image smaller derives every output pixel from real measured data, so it is the safe direction. It can even improve apparent quality, since averaging groups of pixels reduces noise — a high-ISO photo often looks cleaner at half size.

Enlarging is a different problem. The detail was never captured, so it has to be invented: classical resampling does it softly, producing a bigger but blurrier image. Around 2× is the practical ceiling for anything that must look natural.

Keep the aspect ratio

Changing width and height by different amounts stretches the image, and people are extremely good at spotting it — a face a few percent too wide looks wrong even to someone who cannot say why.

When a destination demands an exact ratio your original does not have, crop to that ratio first and then resize, rather than stretching to fit. You lose some framing and keep the proportions.

Resize before compressing, not after

File size is driven far more by pixel count than by the quality setting, so reducing dimensions to what will actually be displayed usually clears an upload limit on its own.

The common mistake is to keep full dimensions and push quality down until the file fits, which produces a large, artefact-ridden image where a smaller clean one would have looked better and weighed less.

Sharpening comes last

Downscaling softens an image slightly — that is inherent to averaging pixels together — so a light sharpen afterwards is normal and appropriate.

Doing it in the other order does not work: sharpening before you downscale amplifies noise and edge detail that the resize is about to average away, and can leave visible halos around high-contrast edges.

Preguntas frecuentes

Is this image resizer free?

Yes — free, unlimited, no watermark and no sign-up. Resize as many images as you like.

Will resizing reduce quality?

Making an image smaller stays crisp. Enlarging past the original size can look soft, since there's no extra detail to add — best results come from scaling down.

Can I keep the aspect ratio?

Yes. Lock the ratio and changing the width updates the height automatically so the image never looks stretched; unlock it to set exact dimensions.

Is my image uploaded?

No — resizing happens entirely in your browser, so your images never leave your device.

Exporta aquí y sigue editando allí — tu imagen te acompaña, sin volver a subirla.