Resize Image Online — Free & Private
Resize images to any dimensions, percentages, or social media presets. Export as PNG, JPG, or WebP — 100% in your browser.
Drop an image to resize
Supports JPG, PNG, WebP, BMP, GIF
How It Works
Upload an image and choose your resize method: enter exact pixel dimensions, scale by percentage, or select from social media presets (Instagram, YouTube, Facebook, Twitter, LinkedIn). The tool uses the browser's native Canvas API with high-quality bicubic interpolation for sharp results.
Export your resized image as PNG (lossless), JPG (compressed), or WebP (modern, smaller) with an adjustable quality slider for lossy formats. The real-time preview shows the resized result before you download.
Features
- ✓Three resize modes: exact pixel dimensions, percentage scale, and social media presets
- ✓Social media presets: Instagram (1080×1080), Facebook Cover (820×312), Twitter Header (1500×500), YouTube Thumbnail (1280×720), LinkedIn Banner (1584×396)
- ✓Aspect ratio lock to prevent distortion (toggle on/off)
- ✓Output format choice: PNG (lossless), JPG (compressed), or WebP (modern)
- ✓Quality slider for JPG and WebP exports to balance size vs. fidelity
- ✓Real-time preview of the resized image with dimensions and file size
- ✓Handles images up to 8000×8000 pixels
- ✓Zero uploads — all processing runs locally in your browser
How to Use This Tool
- Upload your image by drag-and-drop or file picker.
- Choose resize method: enter exact pixel dimensions, set a percentage scale, or select a social media preset.
- Toggle aspect ratio lock on/off. Adjust the quality slider for JPG/WebP output formats.
- Preview the result and download your resized image in PNG, JPG, or WebP format.
Perfect For
- →Social media managers resizing images to exact platform dimensions for Instagram, Facebook, Twitter, YouTube, and LinkedIn
- →Web developers resizing product images and hero banners to specific pixel dimensions for responsive websites
- →E-commerce sellers resizing product photos to marketplace requirements (Amazon, Etsy, eBay)
- →Bloggers and content creators resizing featured images for WordPress, Medium, and other CMS platforms
- →Photographers creating web-optimized versions of high-resolution photos for online galleries
- →App developers resizing screenshots and mockups for app store submissions
Under the Hood
The resize operation uses the browser's Canvas API with the imageSmoothingQuality property set to 'high' for bicubic interpolation. The source image is drawn to a canvas at the target dimensions, then re-exported via canvas.toBlob() in the selected format. This produces sharp, anti-aliased results for both upscaling and downscaling.