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Grátis, sem registo, nada é guardado

Resize image online, free pixel-exact width and height resizer

Drop a photo and resize it to an exact width and height, with optional aspect-ratio lock and a quality knob. Runs in your browser, nothing saved.

  • Runs in your browser
  • Aspect-ratio lock
  • Quality knob included
A 1600-wide food photograph before and the same image resized to 800 pixels wide after.A 1600-wide food photograph before and the same image resized to 800 pixels wide after.

Arraste para comparar, antes / depois

Visão geral

Most image resizers either lock you into a preset (Instagram square, Twitter card) or hand you a percent slider that hides what is really happening. This tool shows the raw width and height in pixels and lets you decide whether to keep the source aspect ratio or stretch the image freely.

Resize and quality are tuned in the same screen so you can shrink a 4000 by 3000 phone photo to a 1200-wide blog upload and trim its file size in one pass. The quality slider controls JPEG, WebP, and AVIF output; PNG keeps every pixel and ignores the slider.

In any modern browser the resize runs locally on your device, so the image never leaves your computer. A server fallback exists for older browsers that cannot run it locally; on that path the upload is deleted the moment we send the result back.

Fluxo de trabalho

Como funciona

Três passos, normalmente em menos de cinco segundos.

  1. 1

    Upload an image

    Drop a JPG, PNG, WebP, or AVIF up to 25 MB. Clipboard paste also works.

  2. 2

    Type the target width and height

    Leave the aspect-ratio lock on if you want to preserve the source ratio: type one side and the other fills in. Turn it off if you want a free-form stretch.

  3. 3

    Pick a format and quality

    Keep the source format or switch to JPEG, PNG, WebP, or AVIF. The quality slider controls JPEG, WebP, and AVIF; PNG keeps every pixel and ignores the slider.

  4. 4

    Download the result

    The resized image downloads with `-resized` appended to the original filename. On modern browsers it is generated on your own device, so nothing is uploaded.

Exemplos

Veja em ação

Arraste cada controlo para inspecionar o antes e o depois ao detalhe.

A 1600 by 1000 lavender landscape (around 3.1 MB) resizes to 800 by 500 (around 480 KB) with no visible loss.A 1600 by 1000 lavender landscape (around 3.1 MB) resizes to 800 by 500 (around 480 KB) with no visible loss.
A 1600 by 1000 lavender landscape (around 3.1 MB) resizes to 800 by 500 (around 480 KB) with no visible loss.
A 1289 by 1600 product portrait resizes to 600 by 745, ready for a blog upload without dropping detail.A 1289 by 1600 product portrait resizes to 600 by 745, ready for a blog upload without dropping detail.
A 1289 by 1600 product portrait resizes to 600 by 745, ready for a blog upload without dropping detail.
A 1073 by 1600 portrait of a barista resizes to 600 by 895 for a profile-card thumbnail.A 1073 by 1600 portrait of a barista resizes to 600 by 895 for a profile-card thumbnail.
A 1073 by 1600 portrait of a barista resizes to 600 by 895 for a profile-card thumbnail.
Privacidade

A sua imagem desaparece quando termina

Processamento híbrido

Resize runs in your browser by default. Your image never leaves your device on that path. For the small share of browsers without local-processing support we fall back to a server round-trip, where the upload is only held while we process it and is deleted the moment the result is sent back. Nothing is saved, indexed, or trained on.

  • Processada em segundos
  • Nada é guardado
  • Sem conta associada
Experimente agora

Carregue uma imagem

Um clique. Sem registo. Tratamos do resto.

Redimensionar imagem

Largue a sua imagem aqui ou clique para enviar
Arraste e largue, procure ficheiros ou cole a partir da área de transferência com Cmd+V
Corre no seu navegador
Nos navegadores modernos o redimensionamento corre inteiramente no seu dispositivo. Na rara recurso ao servidor, o ficheiro enviado é apagado no momento em que devolvemos o resultado.

Precisa de processar mais do que uma imagem?

A versão gratuita Resize image online, free pixel-exact width and height resizer processa uma imagem de cada vez. Um pacote de créditos permite até 50 imagens por lote, um único ZIP para descarregar e três predefinições nomeadas (Blog / Redes sociais / E-commerce). A partir de 5 EUR por 100 créditos. Pague uma vez, sem prazo de validade.

Ver pacotes de créditos
Glossário

Resize glossary

Definições em português simples para os termos técnicos acima.

FAQ

Perguntas frequentes

Respostas às dúvidas mais comuns antes de experimentar uma ferramenta nova.

Quer citar ou partilhar?

Copie um resumo conciso em Markdown (título, descrição, FAQ, URL canónico e citação) pronto a colar num assistente de IA ou num documento.

Cite como

BouseMutton (2026). Resize image online [Web application]. https://bousemutton.com/resize-image-online

Atualizado em: 2026-04-28