Image Resizer

Resize images to exact dimensions. Lock aspect ratio or use social media presets for Instagram, Facebook, Twitter, and YouTube.

Drop an image here or click to upload

Supports JPG, PNG, WebP, BMP

Choose File

📖 How to Use

Drop or select an image, then set your target width and height. Toggle "Lock Aspect Ratio" to keep proportions, or use social media presets for perfect dimensions. Click Resize and download your result.

Social Media Image Sizes

Instagram

Square: 1080×1080. Portrait: 1080×1350. Story: 1080×1920. Landscape: 1080×566.

Facebook

Post: 1200×630. Cover: 820×312. Profile: 170×170. Event: 1920×1005.

Twitter / X

Post: 1600×900. Header: 1500×500. Profile: 400×400. Card: 800×418.

YouTube

Thumbnail: 1280×720. Channel Art: 2560×1440. Profile: 800×800.

About Image Resizing

Image resizing changes the pixel dimensions of an image. When you reduce dimensions, the file size decreases — ideal for faster website loading and email attachments. When you enlarge, the image may lose sharpness depending on how much you scale up.

Locking the aspect ratio ensures your image doesn't get stretched or squished. The aspect ratio is the proportional relationship between width and height — for example, 16:9 for widescreen or 1:1 for square. Our tool automatically calculates the other dimension when one is changed.

All processing happens in your browser using the HTML5 Canvas API. Your images are never uploaded to any server — they stay completely private on your device.

Frequently Asked Questions

Does resizing reduce image quality?

Reducing size generally preserves quality well. Enlarging beyond the original dimensions can cause blurriness since new pixels must be interpolated. For best results, start with the largest version of your image.

What formats are supported?

JPG, PNG, WebP, and GIF (first frame). The output format matches your input. All processing uses your browser's built-in image capabilities.

Are my images uploaded anywhere?

No. Everything runs 100% in your browser. Your images never leave your device — no server processing, no storage, complete privacy.