Skip to main content
100% in your browser — nothing is uploaded

Resize Images Online in Seconds

Set exact dimensions or use one-click presets, keep the aspect ratio locked, and export as JPEG, PNG or WebP. Your photo never leaves your device.

Click to choose an image or drag & drop it here

JPG, PNG, WebP, GIF · processed locally on your device

Preview of the selected image

Original size:

Resized image ready

Resized image result
Download

How it works

Everything happens locally, powered by your browser's canvas engine.

1

Choose an image

Click the box or drag a photo in.

2

Set the size

Type exact pixels or tap a preset.

3

Pick a format

JPEG, PNG or WebP, with a quality slider.

4

Download

Instant result, named with its new size.

Why resize images before publishing?

Cameras and phones capture far more pixels than screens ever display. A 12-megapixel photo is roughly 4000×3000 pixels, yet a blog column is often just 800 pixels wide. Publishing the original wastes bandwidth, slows your page down, and can even hurt your search ranking — image weight is one of the biggest factors in Core Web Vitals. Resizing to the dimensions you actually need routinely cuts file size by 80–95% with zero visible difference to readers.

Resizing also matters beyond the web: email providers cap attachment sizes, marketplaces and directories enforce exact image dimensions, and printing services expect specific resolutions. A quick resize saves you from rejected uploads and blurry results.

Common target sizes

These are the dimensions we get asked about most often:

Use caseRecommended size
Instagram post (square)1080 × 1080 px
Instagram story / Reel1080 × 1920 px
YouTube thumbnail1280 × 720 px
Facebook cover photo820 × 312 px
Pinterest pin1000 × 1500 px
Full-HD wallpaper1920 × 1080 px
Email-friendly photo1024 px on the long edge

Understanding aspect ratio

The aspect ratio is simply width divided by height. A 4000×3000 photo has a 4:3 ratio; force it into a 16:9 box and it will look stretched. That is why the Lock aspect ratio switch is on by default: change one dimension and the other follows automatically, so faces stay round and horizons stay straight. Turn the lock off only when you deliberately need to distort or exactly fill a fixed slot.

JPEG, PNG or WebP — which export should you pick?

JPEG is the safest default for photographs: small files, universal support. It cannot store transparency — transparent areas become opaque. PNG is lossless and keeps transparency, perfect for logos and graphics, but produces heavier files and ignores the quality slider (that's by design — PNG doesn't do lossy compression). WebP is the modern middle ground: photos compress ~30% smaller than JPEG at similar quality and transparency is supported; every current browser can open it, though some older desktop software cannot.

Once resized, you can also convert formats or add protection with our PNG to JPG converter and Watermark App.

Frequently asked questions

No. The resizer runs entirely in your browser using the canvas API. Your image never leaves your device — you can even disconnect from the internet after the page loads and the tool keeps working.

There is no hard limit from us since nothing is uploaded. Very large images (over ~50 megapixels) may be slow on older phones simply because of device memory.

For JPEG and WebP it controls how aggressively the image is compressed: higher means better detail and bigger files. 85–92% is ideal for most photos. PNG is lossless, so the slider is disabled for it.

Export as PNG or WebP and transparent areas are kept. Export as JPEG and they are flattened onto white, because the JPEG format has no alpha channel.

Yes, but upscaling cannot invent detail that was never captured — enlarged images look progressively softer. Small increases (up to ~150%) are usually fine; beyond that expect visible blur.

Anything your browser can display: JPG, PNG, WebP, GIF (first frame), BMP and more. Exports are available as JPEG, PNG or WebP.