Image Resizer – Resize Image Online (Free Tool)

Image Resize changes the dimensions of any image (PNG, JPG, WebP, GIF) entirely in your browser. Set absolute pixels, scale by percentage, or fit within a target while preserving aspect ratio. Resizing uses the browser's canvas API — your image never uploads anywhere, so private screenshots and confidential drawings stay on your device.

• Instant results — no waiting on a server or upload progress bar
• Touch-friendly UI, fine on phones for on-the-go edits
• No registration, account, or installation required
• Supports PNG, JPG, WebP, GIF, and SVG with consistent quality across formats
• Your original file is never uploaded — sensitive screenshots stay on your device

1. Drop your image into the upload area, or click to select a file
2. Set the image resizer options to match your target output
3. Wait for the in-browser processing to complete (usually under a second)
4. Download the result, or run it again with different settings

• Preparing images for blog posts, landing pages, and email campaigns
• Resizing screenshots before posting to issue trackers or chat
• Creating thumbnails at consistent sizes for a CMS
• Generating profile pictures cropped to a square
• Down-sampling huge photos before uploading to a low-bandwidth platform

Resized image looks blurry.

You're likely upscaling. Resizing past 100% can't add detail. Start from a higher-resolution source or use an AI upscaler instead.

Aspect ratio changed even though I locked it.

Toggle "preserve aspect ratio" before changing either dimension. The other dimension auto-adjusts based on the original ratio.

File size barely changed.

Resize reduces pixels but not necessarily filesize for already-compressed JPEGs at high quality. Combine with the image compressor to reduce bytes further.