Can I resize an image without losing quality?

Scaling down generally preserves quality well. Scaling up always involves some interpolation, but our Lanczos resampling algorithm minimizes quality loss. For best results, start from the highest resolution source.

What does 'lock aspect ratio' mean?

When aspect ratio is locked, changing the width automatically adjusts the height proportionally (and vice versa). This prevents your image from appearing stretched or squished.

What social media image sizes are available as presets?

We include presets for Instagram posts (1080x1080), Instagram Stories (1080x1920), Facebook cover (820x312), Twitter header (1500x500), LinkedIn banner (1584x396), YouTube thumbnail (1280x720), and many more.

Does resizing also compress the image?

Resizing changes the pixel dimensions, which naturally affects file size. However, for dedicated compression controls, we recommend using our Compress Image tool after resizing.

Can I resize a GIF without breaking the animation?

Yes, our tool preserves GIF animation frames when resizing. Each frame is individually resampled to the new dimensions.

What is the maximum output resolution?

There is no hard limit on output resolution, but very large dimensions (above 10,000 pixels) may be slow depending on your device's available memory.

Resize Image

Change image dimensions to exact pixel or percentage values. Maintain aspect ratio or set custom sizes.

Drag & drop an image to resize

or click to browse

jpg

jpeg

png

webp

gif

Max file size: 50 MB

How to Use Resize Image

Upload Your Image

Drag and drop or browse to select your image. Supports JPG, PNG, WebP, AVIF, and GIF up to 50 MB.

Set New Dimensions

Enter width and height in pixels, choose a percentage, or pick a preset size. Toggle aspect ratio lock to prevent distortion.

Download Resized Image

Preview the resized result and click Download. Your image is saved at the new dimensions instantly.

About Resize Image

Resizing images is a fundamental operation in any digital workflow. Whether you need a specific pixel dimension for a social media profile picture, a banner for your website, or a thumbnail for a product listing, PicTools' Resize Image tool gives you pixel-perfect control over your image dimensions — entirely in the browser.

Getting the right image size matters more than most people realize. Social media platforms like Instagram, Facebook, LinkedIn, and Twitter each have their own recommended dimensions for profile photos, cover images, and post images. Uploading an incorrectly sized image can result in awkward cropping, blurry stretching, or wasted bandwidth from an oversized file. Similarly, web developers need images at exact breakpoint-specific sizes to implement responsive designs efficiently.

Frequently Asked Questions

Related Tools

Compress Image

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Bulk Resize

Resize up to 50 images at once to consistent dimensions. Ideal for product catalogs and galleries.

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Crop images to exact dimensions or aspect ratios. Perfect for social media, thumbnails, and print.

PNG to JPG

Convert PNG images to JPG format for smaller file sizes. Ideal for photographs and web images.

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Convert JPG images to PNG format for lossless quality and transparency support.

Image to WebP

Convert images to WebP format for superior compression and web performance. Supports transparency.