Image resizer

Change image resolution in the browser, with optional aspect-ratio lock and instant export.

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Overview

Image resizing means changing width and height in pixels. It is useful for adapting banners (for example, from 1920x1080 to 1280x720), preparing thumbnails, and reducing page weight. In this tool, everything runs locally in the browser with no server upload.

When you downscale, you reduce detail and usually file size. When you upscale, files can grow without real quality gain because new pixels are interpolated. For consistent quality, start from a larger original and resize down to the target.

PNG, JPEG, and WebP can be resized here. PNG keeps lossless transparency; JPEG favors lossy compression for photos; WebP often balances quality and size for modern web delivery.

Use aspect-ratio lock to avoid stretching. If you must force exact dimensions for layout slots, disable the lock and set width and height manually.

Example

1920x1080 → 1280x720 (mesma proporção 16:9)

FAQ

Does quality always drop when resizing?

When downsizing, quality loss is usually small and can even look better for web use. When upsizing, perceived loss is higher.

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.