Every platform seems to want a different image size: a website banner, a profile photo, a form that asks for “600 x 600 pixels”. Resizing your image correctly makes it look sharp and stops upload errors.
Resize vs crop vs compress
- Resize changes the dimensions of the whole picture (for example 4000 x 3000 to 1200 x 900).
- Crop cuts away part of the picture to change its shape. Use Crop Image.
- Compress reduces the file size without changing dimensions. Use Compress Image.
How to resize an image
- Open Resize Image.
- Select your picture.
- Enter a new width or height in pixels, or scale by percentage.
- Download the resized image.
Try it now: Resize Image is free, works in your browser and needs no signup.
Keep the aspect ratio
The aspect ratio is the relationship between width and height. If you change only one side and let the other follow, your photo will not look stretched or squashed. If a platform needs a different shape, crop first, then resize.
Useful sizes to know
- Instagram square post: 1080 x 1080 px
- Instagram / TikTok story: 1080 x 1920 px
- YouTube thumbnail: 1280 x 720 px
- Website full-width banner: around 1600–1920 px wide
- Blog content image: around 800–1200 px wide
Platforms change their recommendations from time to time, so check the current guidelines for anything official.
Making images bigger
You can enlarge an image, but you cannot add detail that was not captured. Small images stretched to a large size will look soft. Always start from the largest original you have.
Private processing
Resizing happens on your device in your browser. Your photos are not uploaded.
FAQ
How do I make an image a specific KB size?
Resize to the needed dimensions first, then lower the quality with Compress Image until it fits the limit.
Try it now: Resize Image is free, works in your browser and needs no signup.
Everything runs in your browser. No sign-up, no uploads.
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