Resize Image Online Free

Why Choose DuneTools?

The most complete and easy-to-use resizing tool

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Visual Editor

Drag handles to resize visually. See changes in real-time.

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Ready Presets

Predefined sizes for Instagram, Facebook, Twitter, YouTube and more.

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Rotate & Flip

Rotate 90° in both directions. Flip horizontally or vertically with one click.

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Multiple Formats

Export in JPEG, PNG or WebP with adjustable quality control.

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Total Privacy

All processing happens in your browser. Your images never leave your device.

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Batch Processing

Resize up to 100 images at once. Download everything in a ZIP.

📐 Visual Editor

How to Resize Your Images

Three simple steps to change your photo size

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Upload your image

Drag and drop or select up to 100 images JPG, PNG or WebP.

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Adjust size

Drag visual handles, use presets or enter exact dimensions.

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Download

Choose format (JPG, PNG, WebP), quality and download instantly.

Frequently Asked Questions

Solve your doubts about resizing images

Our tool uses high-quality interpolation to resize images. For best results, avoid scaling more than 200% and use PNG format for images with transparency.

Instagram Post: 1080×1080 px (square). Instagram Story: 1080×1920 px (vertical 9:16). Our tool includes presets for all social networks.

Yes, you can select up to 100 images at once. All will be resized to the same dimensions and downloaded in a ZIP file.

No, all processing happens locally in your browser. Your images never leave your device, ensuring total privacy.

You can export in JPEG (best for photos), PNG (for transparency) or WebP (best compression). You can also adjust compression quality.