ℹ️ Resizing happens entirely in your browser. Your image never leaves your device. Max file size: 5MB.
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Resize any image to exact pixel dimensions, by percentage, or using social media presets. Free and instant.
or click the button below
Choose ImageJPG, PNG, WebP · Max 5MB
Resizing...
This tool changes the pixel dimensions of an image — either to an exact width and height you specify, by a percentage, or to match a preset size for a specific platform like Instagram, LinkedIn or YouTube. Resizing is different from cropping: resizing scales the entire image up or down (potentially changing its aspect ratio if you allow it), while cropping cuts away parts of the image to fit a new shape. This tool handles resizing; for cutting and reframing, see our Image Cropper.
Every platform and use case has different requirements. A profile photo that's too small will look blurry or pixelated when displayed at full size. An image that's far larger than needed wastes bandwidth and slows down page loads — a 4000×3000px photo displayed in a 400px-wide box is downloading 10 times more data than necessary. Getting dimensions right the first time avoids both problems: images that are sharp where they need to be, and no larger than necessary everywhere else.
Resizing happens locally in your browser — your image is never uploaded anywhere, so there's no wait for an upload and no privacy concern even with personal photos.
Use this when a platform specifies a required size — for example, a website that needs a banner image at exactly 1200×400px, or a profile photo that must be exactly 500×500px. Keeping "maintain aspect ratio" enabled will scale the image proportionally and may add some empty space if the target ratio doesn't match the original; disabling it stretches the image to fit exactly, which can distort it if the ratios differ significantly.
Use this when you want to reduce an image's size without targeting a specific platform — for example, scaling a 4000px-wide photo down to 50% (2000px) to make it more manageable for email or a document, while keeping its proportions exactly the same.
For platform-specific presets covering Instagram, Facebook, LinkedIn, YouTube and more, see our Social Media Image Resizer.
It's worth understanding why making an image smaller is essentially always safe, while making an image larger has real limits. A photo contains a fixed amount of detail captured at the moment it was taken — downscaling combines multiple original pixels into fewer output pixels, which is a process that can be done very accurately since you're essentially averaging information that's already there. Upscaling works the opposite way: it needs to create new pixels that weren't in the original, by estimating what they probably should be based on surrounding pixels. This estimation can produce reasonable results for modest upscaling, but there's a fundamental limit — no algorithm can know what detail "should" be there if it was never captured in the first place, which is why heavily upscaled images often look soft, blurry, or have a slightly artificial smoothness compared to an image that was genuinely captured at that resolution.
For website images specifically, the relationship between image dimensions and page load speed is often underestimated. An image file's size roughly scales with its total pixel count — doubling both width and height roughly quadruples the file size. A photo straight from a modern phone or camera, often 3000-4000px wide, is dramatically larger than needed for almost any web use, where images are rarely displayed wider than 1920px even on large screens, and often much narrower. Resizing images to match their actual maximum display size before uploading to a website — rather than uploading originals and letting the website scale them down for display — means visitors download only the data that's actually needed, directly improving page load times, especially on slower connections.
When preparing several images for the same purpose — product photos for an online store, a set of blog images, photos for a gallery — resizing each one to the same dimensions (or the same maximum dimension while maintaining aspect ratio) creates visual consistency, particularly in contexts where images are displayed in a grid or alongside each other. Inconsistent image dimensions in a grid layout can result in some images appearing larger or differently cropped than others depending on how the layout handles varying sizes — resizing all images to a consistent target before placing them in the layout avoids this and gives more predictable, uniform results.
Making an image smaller (downscaling) generally preserves quality well — there's more pixel data than needed, so the result still looks sharp. Making an image larger than its original size (upscaling) cannot add detail that wasn't there, so very large enlargements may look softer or blurrier than the original.
The image will be stretched or squashed to fit exactly the width and height you specify, even if that changes its proportions. This can distort faces, logos and straight lines if the new ratio is very different from the original. Most of the time, keeping aspect ratio locked gives a more natural result.
This tool resizes one image at a time for precise control over each result. For processing many images together, our Bulk Image Compressor handles multiple files and downloads them as a ZIP.
JPG, PNG and WebP are all supported for both input and output. You can also convert format while resizing — for example, upload a PNG and download the resized result as a JPG.
No. All resizing happens directly in your browser using the Canvas API. Your image never leaves your device.