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🖼️ Image Tool

Resize Image Online

Change image dimensions instantly in your browser. Set exact width and height, maintain aspect ratio, choose output format — no uploads.

🖼️
Drop your image here
or click to browse files
Choose Image
Original
Original
Resized
Resized (will appear here)
Quick:
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Output Format
90%
🔒

100% Private

Your image never leaves your device. All processing uses the browser's Canvas API.

📐

Aspect Ratio Lock

Lock the aspect ratio so your image stays proportional when you change one dimension.

🎨

3 Output Formats

Export as JPEG, PNG, or WebP. Choose quality level for JPEG/WebP compression.

⚡

Instant Preview

See a live preview of the resized image before downloading.

Frequently Asked Questions

Does this tool upload my image to a server?▼
No. All image processing happens entirely in your browser using the Canvas API. Your image never leaves your device.
What image formats are supported?▼
This tool supports JPEG, PNG, WebP, GIF (first frame), and BMP files as input. Output can be JPEG, PNG, or WebP.
What does maintaining aspect ratio mean?▼
Maintaining aspect ratio means when you change one dimension (width or height), the other adjusts automatically to keep the image proportions unchanged and avoid distortion.
What is the standard size for social media images?▼
Common sizes: Instagram square 1080×1080, Instagram story 1080×1920, Facebook cover 820×312, Twitter header 1500×500, LinkedIn banner 1584×396, OG image 1200×630.
Will resizing reduce image quality?▼
Enlarging an image beyond its original resolution reduces quality as pixels are added artificially. Downscaling generally preserves quality well, especially with high-quality output settings.

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How to Resize Images to Exact Dimensions

  1. Upload your image from your device.
  2. Enter the target width and height in pixels, or use a percentage to scale proportionally.
  3. Lock the aspect ratio to prevent stretching, or unlock it for exact dimensions.
  4. Download the resized image. Processing happens entirely in your browser.

When You Need This

Good to Know

Always resize down, never up — enlarging images beyond their original resolution makes them blurry. For retina displays, export images at 2x the display size (a 300x300 display area needs a 600x600 image). If you need to crop to a specific aspect ratio, use our Image Crop tool instead.