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Image Resizer

Resize images to exact pixel dimensions or a percentage, with format and quality control.

Your files stay in your browser

How it works

  1. 1

    Upload an image

    Choose PNG/JPEG/WebP/GIF/BMP. Original dimensions are auto-detected.

  2. 2

    Set target dimensions

    Enter width/height (locked by default), pick a preset, or use a percentage.

  3. 3

    Resize and download

    Choose format/quality, click Resize to preview, then Download.

Common use cases

  • Web banner

    Photo → 1920×1080

  • Thumbnail

    Photo → 50%

About This Tool

Resize any image to precise pixel dimensions or a percentage of its original size, with an aspect-ratio lock so proportions never distort. Choose output format (PNG, JPEG, WebP) and quality, preview the resulting file size, and download — all in your browser.

Enter target width/height (lock keeps aspect ratio), pick a preset like 1920×1080 or 800×800, or use a percentage to scale. Unlike the compressor (file size at same dimensions) or cropper (removes pixels), this tool changes pixel dimensions while keeping the full frame.

**How Resizing Works**

Resampling redraws the image into a new pixel grid via the browser canvas (bilinear sampling). Downscaling discards detail (good for thumbnails); upscaling enlarges but cannot add real detail. For web use, match the display size. Your image never leaves your device.

More examples

Examples

Web banner

Input

Photo → 1920×1080

Output

Resized for a hero banner

Thumbnail

Input

Photo → 50%

Output

Half the original dimensions
Frequently Asked Questions
Resize without losing quality?
Downscaling preserves sharpness. Upscaling softens because new pixels are interpolated. Keep aspect ratio locked to avoid stretching.
Resize vs compress?
Resize changes pixel dimensions; compress keeps dimensions but reduces file size via quality/format.
Which output formats?
PNG (lossless), JPEG (small, lossy), WebP (modern, efficient).
Is my image uploaded?
No — resizing uses an in-browser canvas. Nothing is transmitted.

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