Will resizing reduce image quality?

Reducing dimensions discards pixels, so very large reductions can soften fine detail. Modern browsers use high-quality bicubic resampling, which preserves quality well for typical web use.

Are my images uploaded to a server?

No. The Canvas API runs in your browser, so your image never leaves your device.

How do I keep the aspect ratio?

The link icon between the width and height fields locks the ratio (default). Click it to unlock and resize freely.

Can I enlarge an image?

Yes, but enlarging beyond the original dimensions will look soft because the browser has to invent new pixels. For best results, only scale down.

What's the best format for web?

WebP gives the smallest file size with good quality and is supported in all modern browsers. JPG is the safest universal choice for photos.

Image Tools

Resize Image

Resize JPG, PNG, or WebP images by pixel size or percentage. Lock aspect ratio.

Drag & drop files, or click to browse

JPG, PNG, or WebP · max 25 MB

Files processed in your browser

Your files never leave your device. No upload, no servers.

About Resize Image

Resize Image scales JPG, PNG, and WebP files to any pixel dimensions or percentage. Drop in your image, type the width or height you want, and download a resized copy in seconds. The aspect ratio is locked by default so the result stays in proportion. The tool runs entirely in your browser using the Canvas API. Your image is never uploaded, which makes it safe for personal photos, screenshots of internal tools, and other content you wouldn't want sitting on someone else's server. Common uses include sizing a profile picture to fit a 400×400 avatar slot, scaling a hero image down for the web so the page loads faster, generating a 1200×630 OG image for social previews, and creating thumbnails for a portfolio page. You can also switch the output format on the way out — for example, resize a PNG screenshot and save it as a smaller JPG.

How Resize Image works

Drop in a JPG, PNG, or WebP image.
Type a target width or height in pixels — or pick a percentage. Aspect ratio is locked by default.
The Canvas API uses high-quality bicubic resampling to scale the image down (or up) on your device.
Optionally change the output format on the way out (e.g. PNG → JPG to shrink file size).
Preview the result and download. Original file is untouched.

When to use Resize Image

Size a profile picture to a platform's exact avatar dimensions (LinkedIn 400×400, GitHub 460×460, Twitter 400×400).
Generate a 1200×630 Open Graph image for social media previews from a larger source.
Scale a hero image down for the web so the page loads faster and Core Web Vitals improve.
Create thumbnails for a portfolio, blog, or product gallery.
Resize screenshots to fit inside a specific container in a presentation or document.
Down-size a phone photo to under 1 MB before uploading to a forum or marketplace listing.

Why choose Utilix Resize Image

Privacy-first — images stay on your device, so personal photos and design comps never upload.
Aspect-ratio lock prevents accidental distortion. Toggle off when you intentionally want to stretch.
Resize plus format conversion in one step (e.g. PNG screenshot → smaller JPG).
No watermark, no daily limit, no signup wall.
Bicubic resampling preserves quality far better than nearest-neighbor scaling some quick-and-dirty tools use.