Image Resizer

Change image width and height dimensions with aspect ratio lock.

Photo Resizer

Drag & drop an image here

Supports PNG, JPG, JPEG, WebP, GIF

Resize Settings
Canvas Preview

Free Image Resizer Online — RezanToolbox

Looking for a free Image Resizer online? RezanToolbox provides a fast, privacy-first image resizer also known as Photo Resizer, Picture Resizer, Online Image Resizer. Change image width and height dimensions with aspect ratio lock. Unlike cloud-based alternatives, everything runs 100% in your browser — your files and data are never uploaded to any server. Trusted by photographers, designers, marketers, and anyone who needs to edit images without Photoshop, our tool delivers instant results with zero registration, zero downloads, and zero cost.

Also searched as: Photo Resizer · Picture Resizer · Online Image Resizer

How to Use Image Resizer — Step by Step

  1. Go to RezanToolbox Image Resizer — no account or download needed.
  2. Upload your image by dragging it onto the page or clicking Browse File.
  3. Adjust settings like size, quality, crop area, or output format using the controls.
  4. Preview your result in real time, then click Download to save your processed image.

Image Resizer — Frequently Asked Questions

Yes, Image Resizer is 100% free on RezanToolbox. No hidden fees, no premium tiers, no credit card, and no registration required. Use it as many times as you want.

Absolutely. RezanToolbox runs all processing client-side in your browser. Your files, text, and code are never uploaded to any server. Your privacy is fully protected.

No download required. Image Resizer works directly in your web browser on Chrome, Firefox, Safari, and Edge. Just open the page and start using it instantly.

Yes. RezanToolbox is fully responsive and works on iPhone, Android, iPad, and all mobile devices with a modern browser.

Most RezanToolbox image tools support PNG, JPG, JPEG, and WebP formats. Supported formats are shown on the upload area of each tool page.

Once the page loads, most RezanToolbox tools work offline because all computation happens locally in your browser using JavaScript.