Image Resizer

The image resizer changes a picture to exact pixel dimensions or a percentage of its original size. It solves a surprisingly common problem: an image is the wrong size for where it needs to go. A photo is too large for an avatar, a banner is the wrong ratio for a social profile, a scanned document needs to fit a specific form, or a screenshot is too big to attach to an email.

Drop an image in, choose how you want to resize it, and the result appears with its new dimensions and file size ready to download. The tool shows the original dimensions alongside the new ones so you can confirm the change before saving.

Three ways to resize

Social media presets are the fastest option for common destinations. Each preset sets an exact output size that matches a platform's requirements — Instagram square and portrait posts, Instagram and TikTok stories, X posts and profile headers, YouTube thumbnails, and the 1200 × 630 Open Graph image used for link previews. Selecting a preset guarantees the image fits without manual cropping.

Exact pixels lets you type a precise width and height. Use this when a form, application, or device specifies exact dimensions — an avatar at 200 × 200, a product image at 1200 × 1200, or a scan resized to fit a paper size.

Percentage scales the image up or down while keeping the original proportions intact. Resizing to 50% halves both the width and height, which is the safest way to make a large image smaller without distorting it.

Aspect ratio explained

The aspect ratio is the proportional relationship between width and height. When you use a pixel preset, the output size is fixed, so if the original image has a different aspect ratio the picture will be stretched or compressed to fit. When you use percentage mode, the ratio is preserved automatically, so the image simply becomes larger or smaller without distortion. For the most natural results, use percentage when you only need to change the size, and presets when you need to match a specific destination.

Choosing the output format

The resized image can be saved as WebP, JPEG, or PNG. WebP is the default and gives the smallest file at good quality. JPEG suits photographs and works with the widest range of older software. PNG preserves transparency and exact pixels but produces larger files. If you are resizing a logo or an icon with transparent background, keep PNG or choose WebP.

Upscaling and downscaling

Making an image smaller (downscaling) is always safe — detail is preserved and the file gets smaller. Making an image larger (upscaling) cannot invent detail that was never there; the result looks softer than a photo that was genuinely captured at that resolution. The tool lets you upscale when you need a specific size, but for the sharpest results start from the largest version of the image you have.

Privacy

Resizing runs entirely in your browser using the Canvas API. Your image is never uploaded, stored, or sent anywhere, so the tool works on private photos, sensitive documents, and unreleased designs with complete confidence.