About this tool
HD Resizer changes the size of any photo or screenshot right in your browser. Type exact pixels, scale by percent, or pick a ready-made size such as Full HD, 4K, 8K, Instagram or YouTube. You can drag and zoom the image to choose exactly what stays in the frame.
How to use it
- Drop, paste or choose your image (JPG, PNG, WebP, GIF, BMP or iPhone HEIC).
- Pick By pixels, By percent or Presets. If the new shape is different, drag and zoom the image to frame it.
- Choose the format and quality, then press Resize & Download.
Frequently asked questions
How do I resize an image to exact pixels?
Open the By pixels tab and type the width and height. Keep the lock on to preserve the original shape, or turn it off and use Fill or Fit, plus drag and zoom, to decide what is kept.
Can I enlarge an image to 4K or 8K?
Yes, up to 16,384 pixels per side. Enlarging uses sharp Lanczos resampling, but no tool can add detail that was never in the photo, so big enlargements look softer. Very large sizes can fail on phones, which have less memory than computers.
Does resizing reduce quality?
Making an image smaller keeps it sharp. JPG and WebP are re-saved at the quality you choose, and PNG is lossless.
Can I resize many images at once?
Yes. Add several images and download them together as a ZIP file.
Does it open iPhone photos?
Yes. HEIC photos from iPhone open directly and can be saved as JPG, PNG or WebP.
Which formats can I save?
JPG, PNG, WebP and ICO.
Is it free?
Yes. It is free to use, with no sign-up and no watermark.
Are my photos uploaded anywhere?
No. HD Resizer runs entirely in your browser, so your images stay on your device. Nothing is sent to a server, and there is no account or watermark.