Image Resizer
Resize images by pixels or percentage, right in your browser
Drag & drop an image here
or click to browse
Supports JPEG, PNG, WebP
Resize Settings
Result
Original
Resized
How to Use
- Upload your image — Drag and drop a JPEG, PNG, or WebP file onto the upload area, or click to browse your device. All processing happens locally in your browser — no files are uploaded to any server.
- Choose how to resize — Enter exact width and height in pixels, or switch to percentage mode to scale the image relative to its original size. Keep the aspect-ratio lock on to avoid distortion.
- Pick a preset or format — Select a social-media preset (Instagram, Facebook, X, YouTube, LinkedIn) to fill in the right dimensions instantly, then choose PNG, JPEG, or WebP output and adjust the quality slider.
- Resize and download — Click the resize button to see the original and resized images side by side with their dimensions and file sizes, then download the result with one click.
Features
- 100% client-side privacy — All resizing happens entirely in your browser. Your files never leave your device, making this tool ideal for sensitive or confidential images.
- Flexible resize modes — Resize by exact pixel dimensions or by percentage (1–1000%), with automatic aspect-ratio preservation so images are never accidentally stretched.
- Social-media presets — One-click presets for Instagram posts and stories, Facebook posts, X (Twitter) posts, YouTube thumbnails, and LinkedIn posts.
- Format conversion built in — Export your resized image as PNG, JPEG, or WebP in the same step, with an adjustable quality slider for lossy formats.
- Original vs. new comparison — See both versions side by side, including exact dimensions and file sizes, so you know precisely what changed before downloading.
- Drag-and-drop upload — Quickly add images from your desktop or file manager by simply dragging them into the browser window.
Use Cases
- Social media preparation — Resize photos to the exact dimensions each platform expects, avoiding awkward automatic cropping in feeds and stories.
- Website performance optimization — Scale oversized images down to their display size before publishing, reducing page weight and improving load times.
- Email and messaging — Shrink large photos so they fit attachment size limits and send quickly, without installing any software.
- Marketplace and e-commerce listings — Produce consistently sized product images that meet platform requirements for thumbnails and galleries.
Related Tools
- Image Compressor — Reduce image file size with quality-based compression before or after resizing.
- Image Cropper — Crop, rotate, and flip images to frame the perfect composition.
- Image Format Converter — Convert images between PNG, JPEG, and WebP without resizing.
- Favicon Generator — Turn any image into a complete set of browser favicons.
Frequently Asked Questions
How does the image resizer work?
The tool uses your browser's built-in Canvas API to redraw your image at the new dimensions you choose — by exact width and height, by percentage, or via a social-media preset. All processing happens locally in your browser; no data is ever sent to any server.
Will resizing reduce image quality?
Downscaling generally preserves or even improves perceived sharpness. Upscaling beyond the original dimensions can make images look soft or pixelated, because the browser has to invent new pixels. For JPEG and WebP output you can also trade quality for file size with the quality slider.
How do I avoid distorting my image?
Keep the 'Maintain aspect ratio' option enabled. The tool then automatically calculates the second dimension whenever you change width or height, and presets are fitted inside their target box so your image is never stretched or squashed.
Are my images uploaded to a server?
No. All image processing is done entirely in your browser using the Canvas API. Your images never leave your device, which makes the tool private, fast, and usable offline after the page loads.
Which output format should I choose?
PNG keeps every detail and supports transparency, but produces larger files. JPEG is best for photos where some lossy compression is acceptable. WebP usually offers the smallest files at comparable quality and is supported by all modern browsers.