Resize images to an exact pixel size
Set a width and height, or lock the aspect ratio and change just one. Ideal for social media, websites and print.
This changes the dimensions — how many pixels wide and tall the image is. The format and the picture quality stay as they are. To change the file size in kilobytes instead, use the Image Compressor; to change the file type, use the Image Converter.
How it works
Choose your image
The current dimensions are read automatically.
Enter new dimensions
Leave the aspect ratio locked to avoid stretching.
Choose an output format
Match the format to where the image will be used.
The picture never leaves your device
Compressing or converting a photo usually means sending it to somebody else's computer and getting a new one back. Here the work happens in the page you are already looking at: your browser opens the file, the tool rewrites it, and the browser hands you the result.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so nothing is ever attached to an identity.
- No tracking of what you worked on or what was inside the file.
There is no queue and no waiting room. The picture is worked on in front of you and released the moment the tab closes. You can read more about how the conversion runs on your own device, or check our guide to verifying it in DevTools.
What people use it for
Hitting a platform's exact dimensions
Marketplaces and social networks publish pixel sizes. Set them here instead of fighting the uploader.
Shipping a lighter page
Hero images are usually the heaviest thing on a site. Getting them smaller before they reach your CMS is the fastest performance win available.
Sending photos on a weak signal
On hotel Wi-Fi or a poor mobile connection a full-resolution photo can sit at sending for minutes. A smaller copy goes through in seconds.
Preparing marketplace listings
Selling platforms set their own caps on size and dimensions. Get inside them before you start filling in the form.
Formats & limits
What this tool accepts, what it produces, and what it will never ask you for.
- Input
- JPG, PNG and WebP — add several and download one ZIP
- Output
- JPG, PNG or WebP
- Maximum file size
- Set by your device, not by a plan
- Files per run
- Several at once
- Sign-up required
- None
- Watermark
- Never added
- Works offline
- Yes, once the page has loaded
- Supported browsers
- Any current Chrome, Edge, Firefox or Safari
When something goes wrong
Damaged files, and formats outside the list above, stop with a plain message rather than a spinner that never finishes. If a picture opens in your gallery it will normally open here.
The format is not supported. Convert it to PNG or JPG first, or try one of the other image tools.
Why not an upload site
An upload-based tool is a form that posts your picture to someone else's machine. Take that step out and a lot of small annoyances disappear with it.
A typical upload site
This tool
Questions
What happens if I unlock the aspect ratio?
The width and height are treated independently, which can stretch or squash the image. Only unlock it when you deliberately want that effect.
Can I make an image larger?
Yes, but enlarging cannot invent detail that was never captured. The result will look softer than a photo taken at that size originally.
What size should I use for social media?
Instagram posts work well at 1080 by 1080 pixels, stories at 1080 by 1920, and a typical website hero image at 1600 pixels wide. Facebook link previews are best around 1200 by 630.
Is there a file size limit?
No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.
Does it work without an internet connection?
Yes, once the page has loaded. Nothing is fetched while you work, so a dropped connection does not interrupt a run.
Do I need an account or an email address?
No. There is nothing to sign up for, and nothing is ever attached to an identity because no file leaves your device.