Resize Image
Set an exact width and height for a JPG, PNG or WebP image, then export it in the format you need. Everything runs in your browser using the Canvas API, so your image is not uploaded to ImageTidy.
Processing happens in your browser. Your images are not uploaded to ImageTidy.
1. Choose your image
Drag and drop an image here, or
JPG, PNG and WebP
2. Settings
3. Download
Your resized image will appear here.
What resizing actually does
Resizing changes the pixel dimensions of an image — the width and height measured in pixels. Your browser decodes the original image, draws it onto an off-screen canvas at the size you asked for, and re-encodes the result as JPG, PNG or WebP. Reducing dimensions almost always reduces file size too, which is why resizing is often the quickest way to make a photo web-friendly.
Aspect ratio
The aspect ratio is the relationship between width and height. With Keep aspect ratio switched on, changing one value updates the other so the picture keeps its proportions. Turn it off only when you deliberately want to stretch or squash an image to fit a fixed box — otherwise faces and straight lines will look distorted.
Common dimensions
- 1920 × 1080 — full HD, presentations, desktop wallpapers and hero images.
- 1280 × 720 — lighter web images and video thumbnails.
- 1080 × 1080 — square social posts.
- 1200 × 630 — link preview / Open Graph images.
- 800 px wide or less — email attachments and blog body images, where keeping the file small matters more than fine detail.
Why upscaling has limits
Increasing dimensions cannot recreate detail that was never captured. The browser can only interpolate between the pixels that already exist, so an enlarged image usually looks softer or blurrier than the original — sometimes with visible edges around fine lines and text. We show a warning when you enlarge significantly, rather than promising extra sharpness that is not physically possible. If you need a bigger image, start from the largest original you have.
Need a smaller file rather than smaller dimensions? Use the image compressor. Changing format? Try the image converter. Working with many files at once? Bulk resize handles a whole batch.