Image Resizer Documentation

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

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.

• 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.

Input

Text, files, or values entered in the browser, depending on the tool.

Output

A result shown in the browser that can be reviewed or copied where supported.

• 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.

Inputs for this browser-side tool are processed locally and are not sent to SiteIndex. Normal page analytics may still be collected as described in the Privacy Policy. Read the Privacy Policy.