Does the resizer keep my image's proportions?

Yes. The aspect-ratio lock is on by default, so changing the width automatically adjusts the height to match. Turn it off only if you intentionally want to stretch or squeeze the image.

Are my images uploaded anywhere?

No. The JoliTools image resizer runs entirely in your browser using the canvas API. Your files never leave your device, and there is no account, queue, or watermark.

What is the maximum file size?

The tool accepts images up to 50MB, which covers photos from virtually any modern phone or camera.

Image Resizer

Resize JPG, PNG and WebP images to exact pixel dimensions

Choose image

or drag & drop a JPG, PNG or WebP file here

Max 50MB. Processed 100% in your browser, nothing is uploaded.

About this tool

The JoliTools image resizer changes your image's pixel dimensions right in the browser. Enter an exact width and height, tap a common preset like 1920 × 1080, or shrink a photo to 50% or 25% of its original size with one click. A live preview shows the new dimensions and proportions before you commit, and the aspect-ratio lock keeps your image from stretching unless you deliberately switch it off.

Resizing is one of the simplest ways to make images web-friendly: a 6000-pixel phone photo can be scaled to 1920 pixels wide for a fraction of the file size, with no visible difference on screens. Because everything is processed locally with the canvas API, there is no upload step and no waiting in a server queue, even large photos resize in seconds. Choose PNG output when you need lossless quality or transparency, and JPG when you want the smallest file for sharing or embedding.

How to use the image resizer

1Click “Choose image” and select a JPG, PNG or WebP file (up to 50MB).
2Enter a width and height in pixels, or tap a preset like 1920 × 1080, the aspect ratio stays locked unless you turn it off.
3Pick PNG for lossless quality or JPG for a smaller photo file.
4Click “Resize image” and check the before/after dimensions and file sizes.
5Click “Download” to save the resized image to your device.

Good to know

Unlike desktop editors, there is nothing to install and no account to create. The resizer works on phones, tablets, and computers, accepts JPG, PNG, and WebP files up to 50MB, and your images stay on your device the entire time. It pairs well with the image compressor when you want to shrink both dimensions and file size, and with the image cropper when you want to reframe first and resize second.

Frequently asked questions

Downscaling an image is safe and keeps it sharp. Enlarging beyond the original dimensions cannot add detail, so very large upscales may look soft, for best results, start from the highest-resolution original you have.

More free tools you might find useful.

New