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SPCXTools

Resize Image

Resize photos to exact pixel sizes or by percentage — one image or a whole batch, without uploading.

Runs locally — files never leave your device

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How to use Resize Image

  1. 1Choose By pixels to enter a width and/or height, or By percentage to scale everything by the same amount.
  2. 2With Keep aspect ratio on, enter just a width or a height and the other side is calculated automatically.
  3. 3If you enter both, choose Fit inside (no cropping), Fill & crop (exact size, centre-cropped) or Stretch. Presets fill in common social media sizes.
  4. 4Drop your images. Download each resized image or all as a ZIP; change settings and click Resize again to redo them.

Resize images to any size

Whether a website asks for a 600 × 400 image, Instagram needs a 1080 × 1350 portrait or your email bounces because a photo is too big, resizing is the answer. This image resizer changes the dimensions of JPG, PNG, WebP and HEIC images by exact pixels or by percentage, and can resize dozens of images in one go. It uses high-quality scaling in your browser, so your photos are never uploaded.

Resize options

  • By pixels – set a width, a height or both. With aspect ratio locked, enter one side and the other is calculated.
  • By percentage – scale by any amount from 5% to 200%, perfect for shrinking a batch of photos by the same factor.
  • Fit inside – the whole image fits within your width × height box; one side may be smaller.
  • Fill & crop – the image fills the exact width × height and the overflow is cropped evenly from the centre.
  • Stretch – forces exact dimensions, distorting the image if the shape differs.
  • Presets for popular sizes: square and portrait posts, stories, link previews, HD and Full HD.

Popular image sizes

Use Size (px) Aspect ratio
Instagram square post 1080 × 1080 1:1
Instagram portrait post 1080 × 1350 4:5
Stories, Reels, TikTok 1080 × 1920 9:16
Link preview (Open Graph) 1200 × 630 1.91:1
YouTube thumbnail 1280 × 720 16:9
Full HD wallpaper 1920 × 1080 16:9

Resizing vs. compressing vs. cropping

Resizing changes the number of pixels — the whole picture becomes smaller or larger. Compressing keeps the pixel dimensions but stores them more efficiently. Cropping cuts away part of the picture. For the smallest files, resize first and then compress. For full control over what part of the image is kept, use Crop Image before resizing.

Tips

  • Resize from the original whenever possible, especially when making images smaller in several steps.
  • For retina screens, export web images at about twice the displayed size (e.g. 1600 px wide for an 800 px column), then compress.
  • Keep a copy of the full-size original before overwriting files.

Reduce file size further with Compress Image, or change the format with the Image Converter.

Frequently asked questions

How do I resize without distorting the image?
Keep Keep aspect ratio ticked and enter only the width or only the height. If you need exact dimensions with a different shape from the original, choose Fill & crop, which scales the image to cover the area and trims the edges evenly, or Fit inside, which keeps the whole image within the box.
What sizes should I use for social media?
Common sizes are 1080 × 1080 (square post), 1080 × 1350 (portrait post) and 1080 × 1920 (stories and reels) for Instagram; 1200 × 630 for link previews on Facebook, LinkedIn and X; and 1280 × 720 or 1920 × 1080 for YouTube thumbnails and 16:9 video frames. The presets set these in one click.
Can I make an image larger?
Yes, but enlarging can't add detail — the image will look softer. Scaling up by up to about 150% is usually acceptable; for more, an AI upscaler gives better results.
Does resizing reduce file size?
Yes. Halving the width and height leaves a quarter of the pixels, which usually cuts the file size by around 70–75%. For even smaller files, follow up with Compress Image.
Which format are the resized images saved in?
The same family as the original — PNG stays PNG, WebP stays WebP, and JPG (as well as HEIC and other formats) is saved as high-quality JPG.
Are my photos uploaded?
No. Resizing happens in your browser using high-quality canvas scaling. Your images stay on your device.

Related tools

Compress ImageMake images smaller by quality or to an exact target size in KB — in batches, without uploading.Crop ImageDrag a crop box or enter exact pixels to crop photos to any shape — square, 16:9, 4:5 and more.Image ConverterConvert photos and graphics between JPG, PNG, WebP and AVIF — in batches, without uploading.HEIC to JPG ConverterConvert iPhone HEIC photos to JPG or PNG that open everywhere — privately, in your browser.JPG to PNG ConverterConvert JPG and JPEG images to lossless PNG files — quickly, privately and in batches.PNG to JPG ConverterTurn PNG images into smaller, widely compatible JPG files — in bulk and without uploading.