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Image Resizer

Resize JPG, PNG, and WebP images locally with aspect-ratio locking, presets, and export-quality controls.

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Image Resizer

Resize JPG, PNG, and WebP images locally. Up to 20 images, 20 MB each, 50 MB combined. Sources and output are limited to 40 megapixels; output sides up to 8,192 pixels.

You can also drag and drop images anywhere on this tool. The same size, format, and quality settings apply to every selected image.

How to use it

  1. Choose supported PNG, JPEG, or WebP files.
  2. Set dimensions, aspect preservation, scaling, output format, and quality.
  3. Select Download resized images and inspect the exported dimensions; browsers may ask permission for multiple downloads.
What is Image Resizer?

Resize JPG, PNG, and WebP images locally with aspect-ratio locking, presets, and export-quality controls.

How it works

SiteIndex resizes each selected image locally using the canvas API. One-click social presets (Instagram, X, Facebook, LinkedIn) set common target dimensions instantly, and multiple images are processed and downloaded in one batch.

Common uses
  • Resize an image to a common social media post size in one click.
  • Batch-resize multiple images to the same dimensions at once.
  • Convert an image to a different format while resizing.
Limitations
  • Canvas export does not preserve animation or all metadata/color profiles.
  • Batch aspect-preserved heights follow each file's original ratio; a single displayed preview is not proof of all output dimensions.
Frequently asked questions
Does this upload my images?
No. Images are resized entirely in your browser using the canvas API and are never uploaded.

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