opnai / Resize Image
Resize Image
Processed in your browser. Your files are never uploaded and metadata such as GPS location is removed.
Change the dimensions of one image or many. Resize by a percentage, or enter an exact width and height in pixels. An aspect ratio lock keeps proportions correct so pictures are not stretched.
All work happens in your browser. Your images are not uploaded, and results can be downloaded one by one or as a ZIP.
How to use Resize Image
- Add images by dropping them in or choosing them. JPG, PNG, WebP, AVIF and HEIC are accepted.
- Pick Percent or Pixels. In pixels mode, enter a width, a height or both. With the aspect lock on, the other side is calculated for each image.
- Press Resize. Each file shows its new dimensions and size.
- Download files individually or press Download all as ZIP.
Features
Conversion runs in your browser tab. Your files are never sent to a server, so there is nothing to delete later.
Re-encoding through a canvas drops EXIF data such as GPS location and camera details, which is handy before sharing photos.
Add many files at once, see the status of each one, download them individually or all together in a ZIP.
Halve a batch of photos in one go, or set a precise width for a web layout.
Keep proportions so faces and logos are never squashed.
JPG stays JPG, PNG stays PNG and WebP stays WebP. Others are saved as PNG.
Common sizes
Web pages usually need images no wider than 1200 to 1600 pixels, social posts often use about 1080 pixels, and email attachments are comfortable at 1024 pixels on the long side. Resizing to the size you need makes pages load faster and uploads finish sooner.
Frequently asked questions
What does the aspect ratio lock do?
With the lock on, you set one side and the other follows from each image proportions. Switch it off to force exact width and height, which can stretch the picture.
Can I make an image larger?
Yes, but enlarging cannot add real detail, so it looks soft. For sharper enlargements try the AI Image Upscaler.
Are my images uploaded anywhere?
No. Everything happens inside your browser on your own device. We cannot see your files and nothing is sent over the network, which also means the tool keeps working if your connection drops after the page has loaded.
Which format is the result?
The original format is kept for JPG, PNG and WebP. AVIF and HEIC inputs are saved as PNG. Use the Compress Image tool if you want to choose the output format.
Is there a size limit on the output?
Browsers limit canvas size, often around 16,000 pixels per side and fewer on phones. Very large targets may fail with a clear message.
Is quality lost when resizing?
Shrinking preserves quality well. JPG and WebP are re-encoded at your chosen quality, so keep it high if you need the best result.