Resize Image
Change the dimensions of any image — JPG, PNG, WebP, HEIC and more. Resize by width, height, percentage or to an exact size, with the aspect ratio kept automatically. Everything runs in your browser; your images never leave your device.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to resize
- 1
Add your images
Drag and drop your images onto the tool, or click to browse. They’re decoded straight in your browser — never uploaded to a server.
- 2
Set the new size
Resize by width, by height, by percentage, or to an exact width × height. Aspect ratio is kept automatically (except in exact mode), and you can pick the output format and quality.
- 3
Download the resized image
Save a single image directly, or get a batch back as one .zip. Free, instant, and never watermarked.
Why use Resize Image?
Resize how you want
By width, by height, by percentage, or to an exact width × height — with aspect ratio kept automatically unless you ask for exact dimensions.
Batch resize
Apply one rule to a whole batch at once — a “by width” rule sizes each image correctly for its own aspect. A single image downloads directly; many come back as a .zip.
100% private
Resizing runs locally in your browser. Your images are never uploaded, stored or seen by anyone.
Works on any device
No install and no account. It runs in any modern browser on Windows, macOS, Linux, Android or iPhone.
Resize without uploading your photos
Most “resize image” websites upload your picture to their servers first. LocalTools does it entirely in your browser with JavaScript, so the file never leaves your device — handy for ID photos, screenshots and anything private. There are no limits and no watermark.
Four ways to size it
Set a target width and the height follows to keep the proportions; do the same from the height; scale by a percentage to make something half or a quarter of its size; or give an exact width × height when you need to hit a specific box (note that exact mode can stretch the image). Drop in a whole batch and one rule sizes each image correctly for its own shape.
Frequently asked questions
Will resizing keep the aspect ratio?
Yes, by default. Resizing by width, by height or by percentage always keeps the original proportions. Only “Exact W×H” can stretch the image, because it forces both dimensions.
Can I make an image larger?
Yes — set a width, height or percentage bigger than the original. Enlarging can’t add detail that isn’t there, so very large upscales will look soft; the tool keeps the result sharp as it can.
Which image formats can I resize?
JPG/JPEG, PNG, WebP, GIF, BMP, AVIF and SVG are handled natively, and iPhone HEIC/HEIF photos are decoded automatically. You can mix formats in one batch.
Are my images uploaded to a server?
No. Decoding, any editing, and the conversion all run entirely in your browser. Your files never leave your device, so it even works offline once the page has loaded.
Can I convert several images at once?
Yes. Add as many as you like — a single image downloads directly, and multiple images are bundled into one .zip so you get everything in a single click.