What the Image Resizer does
This tool changes the pixel dimensions of a photo or graphic to whatever size you need. Type in a target width and height, and it redraws the image at that size right inside your browser. It is handy when an upload form rejects oversized files, when a profile picture needs exact dimensions, or when a banner has to fit a fixed slot on a page. Designers, students, sellers listing products and anyone wrangling a too-big screenshot will get use out of it.
How to use it
- Drop your image onto the box, or click it to pick a file from your device.
- Set the Width in pixels (it starts at 800).
- Set the Height in pixels, or leave Keep aspect ratio ticked and let the height fill in on its own.
- If you need a precise non-proportional size, untick Keep aspect ratio and type both numbers.
- Click Download to save the resized PNG.
That is the whole flow. There are no extra steps, no watermark and no waiting in a queue.
Why resize here
Because the work happens locally, the result appears the moment you hit download. Nothing is sent to a server, so a private screenshot or an unreleased design stays on your machine. It is free, needs no account, and runs on a phone, tablet or laptop with the same three controls. The aspect-ratio lock does the math for you, which means fewer stretched, awkward-looking images.
One tip: if you only care about a maximum width (say fitting a 1200px column), set the width and let the ratio toggle handle the height. You will get a clean, correctly proportioned image every time.
Resizing a whole folder of photos in one go? The desktop companion BulkPro, built by the same team, is made for batch jobs like that. For a quick file or two, this page is all you need.
Frequently asked questions
- Does resizing an image lose quality?
- Shrinking an image is usually clean. Enlarging past the original pixel size will look softer, because the tool has to invent new pixels. For the sharpest result, resize down rather than up, and start from the largest version of the image you have. The output is saved as a PNG, which is lossless.
- How do I keep my image from looking stretched?
- Leave the Keep aspect ratio box ticked. When it is on, you only set the Width and the height is calculated automatically from the original proportions, so nothing gets squashed. Untick it only when you deliberately want a specific width and height that do not match the original shape.
- What file format do I get back?
- The resized image downloads as a PNG file, named after your original with a -jottools suffix. PNG keeps transparency and avoids extra compression artifacts, so it is a safe default for logos, screenshots and photos alike.
- Are my photos uploaded anywhere?
- No. The resizing happens entirely in your browser using a canvas, so the image never leaves your device. There is no server, no account and nothing stored. You can even use it offline once the page has loaded.
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Last updated: June 15, 2026