Free Online Image Resizer

Oversized images are one of the main reasons websites load slowly. Uploading heavy 4K camera photos directly to your blog or social channels wastes bandwidth and hurts mobile experience. Resizing to the exact dimensions you need fixes that instantly and supports better Core Web Vitals.

This tool scales images in your browser with the HTML5 Canvas API—no uploads to external servers.

Image resizing changes pixel dimensions (and often file size) so assets match a layout slot, social template, or print size. In 2026 it remains a first-line performance and design step: serve 1200px heroes instead of 4000px camera originals, keep product grids consistent, and avoid stretching logos.

• Flexible Scaling Modes: Max width, max height, exact dimensions, or percentage.
• Output Formatting: Export as JPG, PNG, or WebP.
• Batch Resizing: Process multiple images in one pass.
• Custom Compression Quality: Balance clarity and file size with the quality slider.

1. Scale down from larger sources: Upscaling soft phone photos looks pixelated—upscale with AI first if needed.
2. Match layout width: Most blogs look sharp at about 800–1200px wide.
3. Keep aspect ratio unless cropping on purpose: Exact mode can distort if both axes are forced.
4. Use WebP for delivery: After resizing, convert for smaller transfer sizes.
5. Strip EXIF before publishing: Resize does not remove GPS metadata by itself.
6. Batch shared dimensions: Keep product grids consistent with one width/height rule.
7. Keep originals offline: Browser resizing keeps private shoots off cloud converters.

Performance budgets still punish oversized rasters. A hero that displays at 1100px should not ship a 5000px master. Resizing early in the pipeline—before CMS upload—cuts CDN bills and improves LCP on mobile. Design systems that define slot sizes (card, hero, avatar) make resizing mechanical instead of guesswork.

Choose format after dimensions: PNG for UI with transparency, JPG for photos, WebP when browsers in your audience support it. OmniTools keeps the resize step private so client galleries and unreleased campaigns never need a third-party upload.

Combine resizing with background removal, EXIF stripping, and WebP conversion for a full publish-ready path without a desktop suite.

For best quality, scale down from a larger source. Match output size to your site layout width—800px to 1200px is enough for most blogs.

No server queues—resize in your browser.

Photos never leave your device.

Resize many images without a subscription.

After resizing, convert to WebP for smaller delivery, or remove EXIF before sharing. For transparency, use JPG to PNG or PNG to WebP. Pair with the background remover and image to PDF when you need cut-outs or documents.