How do I resize an image without losing quality?

Use high-quality bicubic interpolation (which this tool uses by default) and avoid upscaling images more than 2x their original size. For best results, resize down rather than up, and save as PNG for lossless quality.

What are the correct image sizes for social media?

Instagram Post: 1080x1080px. Instagram Story: 1080x1920px. Facebook Cover: 820x312px. Facebook Post: 1200x630px. Twitter Header: 1500x500px. YouTube Thumbnail: 1280x720px. LinkedIn Banner: 1584x396px. Pinterest Pin: 1000x1500px.

What is the difference between resizing and compressing?

Resizing changes the pixel dimensions (width and height) of an image, while compressing reduces file size without changing dimensions. Both can make files smaller, but resizing physically changes the image size. Use our Image Compressor if you want to keep the same dimensions but reduce file size.

Can I resize to custom dimensions?

Yes. Enter any width and height in pixels. You can also lock the aspect ratio so the image scales proportionally without stretching or distortion.

Is my image data safe when resizing?

All resizing happens in your browser using the HTML5 Canvas API. Your images are never uploaded to any server. We have zero access to your files.

What does 'lock aspect ratio' mean?

Locking the aspect ratio keeps the proportional relationship between width and height. When you change one dimension, the other adjusts automatically so the image does not look stretched or squished. For example, a 1920x1080 image scaled to 960px wide will automatically set the height to 540px.

What happens when I make an image larger than its original size?

Enlarging an image beyond its original dimensions is called upscaling. The tool must generate new pixel data that did not exist in the original, which can cause blurriness or pixelation. Small increases (up to 2x) usually look acceptable, but enlarging a 500px image to 4000px will produce a noticeably soft result.

What image size do I need for printing?

For high-quality prints, you need 300 DPI (dots per inch). Multiply your desired print size in inches by 300 to get the pixel dimensions. For example, a 4x6 inch print needs 1200x1800px. An 8x10 inch print needs 2400x3000px. A 16x20 poster needs 4800x6000px.

How do I resize an image to a specific file size like 100KB?

Resizing alone may not achieve an exact file size because file size also depends on compression level and image content. To hit a specific file size, use our Image Compressor tool which lets you target sizes like 100KB, 200KB, or 500KB directly.

What is the best image size for websites?

For full-width hero images, use 1920px wide. For content images, 800-1200px wide is usually enough. Thumbnails work well at 300-400px. Always resize images to match their display size on your site, because serving a 4000px image in a 600px container wastes bandwidth and slows your page load.

Does resizing an image change the file format?

By default, the resized image keeps the same format as the original. However, you can choose a different output format (JPG, PNG, or WebP) before downloading. If you need to convert formats without changing dimensions, use our Image Converter tool.

Why does my resized image look blurry?

Blurriness usually happens when you enlarge a small image beyond its pixel capacity, or when you resize a screenshot or graphic to JPG format (which blurs sharp edges). Try saving as PNG instead for graphics with text or sharp lines. For photos, make sure you are not upscaling more than 2x the original dimensions.

Image Resizer

Resize to exact pixel dimensions or pick a platform preset — Instagram, YouTube, passport, and more.

Drag & drop an image to resize, or click to browse

Drag & drop, paste from clipboard, or click to browse — JPG, JPEG, PNG, WEBP, GIF, BMP, SVG, TIFF

Files never leave your browser · ⌘V to paste a screenshot

How to Resize an Image Online

Upload Your Image

Drag and drop any image file into the box above. We support JPG, PNG, WebP, GIF, BMP, and more. Your image stays in your browser.

Set Dimensions

Enter exact width and height in pixels, or pick a social media preset like Instagram, Facebook, or YouTube. Lock the aspect ratio to prevent stretching.

Download

Click download to save your resized image. Choose your output format and quality. No watermarks, no limits.

When to Resize Your Images

Every platform has its own recommended image dimensions. Uploading the wrong size means your image gets cropped awkwardly, stretched, or displayed with black bars. Resizing before uploading gives you full control over how your photo appears.

Common reasons to resize: preparing product photos for your online store (Shopify, Etsy), creating social media posts that display correctly on every device, meeting passport or visa photo requirements (usually 600x600px or 2x2 inches at 300 DPI), or reducing large camera photos for faster email sharing.

Social Media Image Sizes (2026)

Quick reference for every major platform. Click to resize instantly.

Instagram Post1080x1080px Facebook Cover820x312px YouTube Thumbnail1280x720px LinkedIn Banner1584x396px Passport Photo600x600px Twitter/X Profile400x400px Discord512x512px Etsy Listing2700x2025px

Tips for Best Results

✓Always resize down, not up. Making a small image larger creates blurry, pixelated results.
✓Lock the aspect ratio to prevent your image from looking stretched or squished.
✓For social media, use the built-in presets. They stay current with each platform's latest requirements.
✓Save as PNG if you need pixel-perfect quality. Use JPG for smaller file sizes when a slight quality trade-off is acceptable.
✓After resizing, consider compressing the image too. A 1080x1080 JPG at 80% quality is usually under 200KB, perfect for fast loading.

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