Resize images online for free. Change width and height in pixels, percentage, or preset sizes. Maintain aspect ratio or freeform. All processing happens in your browser.
Select an image file from your device.
Enter your desired width or height in pixels.
Toggle "Lock Aspect Ratio" to prevent distortion.
Download your resized image instantly.
Scaling down generally retains quality. Scaling up beyond 1.5–2× the original dimensions produces visible blur, as the browser must interpolate (invent) new pixels between the originals.
Enable the "Lock Aspect Ratio" toggle. Changing width or height will automatically update the other dimension to maintain the original proportions.
Instagram post: 1080×1080px. Instagram story: 1080×1920px. Facebook cover: 851×315px. LinkedIn banner: 1584×396px. YouTube thumbnail: 1280×720px. Twitter header: 1500×500px.
Yes — fewer pixels means less data. A 3000px wide image resized to 800px typically reduces file size by 70–90%. Compress further with the Image Compressor tool for maximum savings.
No — the Canvas API strips EXIF metadata during resampling. The output pixel rotation is correct, but GPS coordinates, camera settings, and other metadata are removed from the file.
No — resizing uses the HTML5 Canvas API entirely in your browser. Your images never leave your device.
Every platform has its own image dimension requirements. Shopify wants product images at 2048×2048px. LinkedIn banners are 1584×396px. Passport photos are 35×45mm at 600 DPI. Email signature logos should be under 200px wide.
This tool lets you enter exact pixel dimensions, toggle aspect ratio lock to prevent stretching, and download the result — all before leaving your browser tab. Your image never leaves your device.
Image resizing is resampling — mapping the original pixel grid onto a new grid of different dimensions. Two scenarios:
Scaling down: Existing pixels are averaged together and consolidated into fewer cells on the smaller canvas. Generally produces sharp results with minimal quality loss.
Scaling up: The browser must invent new pixels between the original ones using interpolation — typically bilinear blending of neighboring pixels. The result is softer than the original. Upscaling beyond 2× produces noticeably blurry output regardless of the algorithm.
The Canvas API handles this in one line:
ctx.drawImage(sourceImage, 0, 0, newWidth, newHeight)
After resampling, canvas.toBlob() exports the result as a new image file in your chosen format.
Aspect ratio lock: When enabled, changing one dimension automatically calculates the other to maintain the original proportions:
New Height = (New Width ÷ Original Width) × Original Height
| Platform | Dimension | Notes |
|---|---|---|
| Instagram post | 1080×1080px | Square format |
| Instagram story | 1080×1920px | 9:16 vertical |
| Facebook cover | 851×315px | Desktop header |
| LinkedIn banner | 1584×396px | Profile background |
| Twitter/X header | 1500×500px | Profile header |
| YouTube thumbnail | 1280×720px | 16:9 format |
| Open Graph image | 1200×630px | Social preview |
| Email header | 600px wide | Width only, height varies |
| Passport photo (India) | 35×45mm @ 600 DPI | ~826×1063px |
| Shopify product | 2048×2048px recommended | Square, scalable |
E-commerce product photos: Platforms like WooCommerce, Shopify, and Amazon have recommended or required image dimensions. Resize product images to spec before uploading to avoid auto-cropping or blank white padding.
Social media content: Each platform uses different aspect ratios and recommended sizes. A photo that looks perfect on Instagram may be cropped awkw...
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Change image dimensions while maintaining quality.
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