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Resize Image
Resizing changes how many pixels an image contains. It is the most effective way to make a file dramatically smaller, and it is what you need when a platform asks for an exact width and height.
- Free
- No signup
- Private · runs locally
How to resize an image
- Upload your image - the current dimensions appear automatically.
- Type a new width or height, or use the 25%, 50% and 75% presets.
- Keep “Lock aspect ratio” enabled so the image is not stretched. Turn it off only when you need exact dimensions and accept distortion.
- Press “Resize image”, then download the result.
Resize or compress?
They solve different problems. Compression keeps the same dimensions and stores them in fewer bytes. Resizing reduces the number of pixels outright.
File size scales with the pixel count, not with the width alone. Halving both width and height leaves a quarter of the pixels, which usually means a file roughly four times smaller before any compression is applied.
Enlarging an image cannot add detail that was never captured - a 400px image scaled to 1600px will look soft. Always start from the largest original you have.
Frequently asked questions
What does locking the aspect ratio do?
It keeps the original width-to-height proportion. Change one dimension and the other is calculated for you, so the image is never squashed or stretched.
Can I make an image larger without losing quality?
Not really. Upscaling interpolates new pixels from existing ones, so the result is smoother but never sharper. For best results start from the highest-resolution original available.
Which formats can I resize?
PNG, JPG and WebP. The output keeps the format of the file you uploaded.