🖼️

Image Resizer

Resize images by pixels or percentage. Maintain aspect ratio or set custom dimensions. 100% private — processed in your browser.

📂

Click to upload or drag & drop an image

PNG, JPG, GIF, WebP, BMP supported

About Image Resizer

Resize any image directly in your browser without uploading it to a server. Supports JPEG, PNG, WebP, GIF, and BMP formats. Lock aspect ratio to avoid distortion, or set custom width and height. Download the resized image in your preferred format.

How to Use

  1. Click Choose File or drag and drop an image onto the upload area.
  2. Select By Pixels to enter exact width/height, or By Percentage to scale proportionally.
  3. Check Lock aspect ratio to prevent distortion when resizing by pixels.
  4. Choose your preferred output format (JPEG, PNG, or WebP) and adjust quality.
  5. Click Resize Image, then Download the result.

Tips

Use WebP format for the smallest file size while maintaining quality. Use PNG for images with transparency. JPEG works best for photographs.

Frequently Asked Questions

No. Everything happens entirely in your browser using the Canvas API. Your image never leaves your device and is never sent to any server.
Yes — reducing the pixel dimensions generally reduces file size. You can also control this further with the quality slider when saving as JPEG or WebP.
Locking the aspect ratio means when you change the width, the height is automatically adjusted (and vice versa) to keep the same proportions as the original image, preventing it from appearing stretched or squished.
Yes, but enlarging an image beyond its original dimensions will reduce quality and may cause blurriness, since there is no new pixel data to add. It's best to resize downward whenever possible.
Use JPEG for photos where small file size matters. Use PNG for graphics, logos, or images with transparency. Use WebP for the best combination of quality and compression — it's supported by all modern browsers.

About Image Resizer

The Image Resizer lets you resize any image to exact pixel dimensions directly in your browser. No upload to a server — your image is processed using the HTML canvas API and downloaded instantly.

How to Use

  1. Click Upload Image or drag and drop an image onto the tool.
  2. Enter the desired Width and/or Height in pixels.
  3. Toggle Maintain Aspect Ratio to prevent distortion.
  4. Choose the output Format (PNG or JPEG) and quality.
  5. Click Download to save the resized image.

How It Works

The uploaded image is drawn onto an HTML canvas at the target dimensions using the browser's built-in image scaling. The canvas is then exported as PNG or JPEG. All processing is local — no image data ever leaves your device.

Example

Resize a 4000×3000 photo to 800×600 for web use: upload the photo, set Width to 800, lock aspect ratio, click Download. The resulting image is web-optimized and a fraction of the original file size.

Frequently Asked Questions

You can upload JPG, PNG, WebP, GIF (first frame), and BMP. Output formats are PNG and JPEG.
Downscaling (making smaller) typically preserves quality. Upscaling (making larger than the original) will reduce sharpness since no new pixel data is added. For best quality, always start with the highest resolution source.
The tool processes one image at a time. For batch resizing, you would need to use desktop software like Photoshop, GIMP, or a command-line tool like ImageMagick.
No. Your image is processed entirely in your browser using the canvas API. It never leaves your device.