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Image Resizer

Resize images to exact pixel dimensions or by percentage. The aspect ratio is locked by default so photos are never accidentally stretched.

Runs in your browser — files never leave your device

Free · No sign-upOutputs Same as input
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How to use Image Resizer

  1. Add an image (JPG, PNG or WebP). Its current dimensions are shown.

  2. Enter a new width or height, or a percentage. Keep the ratio locked to avoid distortion.

  3. Click Resize image.

  4. Preview the result and download.

About this tool

Resizing reduces both dimensions and file size, which is often more effective than compression alone. Enter a target width or height and the other dimension is calculated automatically to preserve the aspect ratio; unlock the ratio only when you genuinely need a non-proportional size. High-quality browser scaling is used, and the output format matches your input so no unexpected conversion happens.

This is especially useful when a platform enforces exact dimension requirements — a profile photo that must be a specific size, a banner image with a fixed width, or a thumbnail spec from a content management system.

Common ways people use this

  • Meeting a platform's exact pixel requirement for a profile photo, banner, or thumbnail
  • Shrinking a large camera photo down to web-friendly dimensions before uploading
  • Creating a smaller version of an image for a slideshow or presentation without stretching it

Tips for better results

  • Use one of the percentage presets (25%, 50%, 75%) for a quick, proportional resize without doing any math.
  • If you need a specific width for a website, resize first and compress afterward for the smallest possible final file.

Frequently asked questions

Will resizing distort my photo?
Not with the aspect ratio locked, which is the default. Entering one dimension calculates the other proportionally. Unlocking the ratio lets you set both freely, which can stretch the image.
Can I make an image larger?
Yes, but enlarging cannot add real detail — the result will be somewhat soft. Upscaling works best for modest increases.
Does resizing change the format or quality?
The output keeps your input format. JPG and WebP are re-encoded at high quality; PNG stays lossless.
What's the maximum size I can resize to?
Up to 20,000 pixels in either dimension, though very large sizes depend on your device's available memory since everything happens in your browser.
Should I resize or crop if I want to remove part of the image?
Resize scales the whole image down or up. If you want to cut away part of the frame instead, use the Image Cropper.

Related tools

Other tools people commonly use alongside this one.

Image Cropper

Cut an image down to exactly the region you need. Drag the crop box on the preview or type precise pixel values.

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Image Compressor

Shrink image file sizes by re-encoding at a quality level you control. Works with JPG, PNG and WebP, entirely in your browser.

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Image Rotator

Rotate an image in 90° steps or mirror it horizontally or vertically. The preview updates instantly and the download matches exactly what you see.

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JPG to PNG

Convert JPG photos to lossless PNG files directly in your browser. Original dimensions are preserved and nothing is uploaded.

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