Free Online Image Resizer
Resize images by exact pixel dimensions, scaling percentage, or target file size with live real-time preview. Maintain aspect ratio, flip, rotate, and convert formats effortlessly.
What is Image Resizing?
Image resizing changes the physical pixel dimensions (width × height) of an image file. Smaller dimensions directly decrease display size and lower file weight without destroying visual sharpness at target display resolutions.
- Live Preview: Real-time Canvas
- Formats: JPG, PNG, WebP, GIF
- Max Size: 10MB per file
Resizing Image...
Scaling dimensions and optimizing image encoding
Image Resized Successfully!
ReadyFree Online Image Resizer — Resize Photos to Any Dimension
Resize any image to exact pixel dimensions, percentage, or preset sizes for social media platforms. Upload JPG, PNG, WebP, or GIF, set your target width and height, and download the resized image instantly. The tool maintains aspect ratio by default or lets you stretch to custom dimensions when needed.
Whether you need a 1080×1080 square for Instagram, a 1280×720 YouTube thumbnail, a 150×150 profile picture, or a specific pixel size for a website header — this tool handles it in one click with no quality loss at standard web resolutions.
When Do You Need to Resize an Image?
- Social media uploads — each platform has specific dimension requirements (Instagram 1080px, Facebook 1200×628, Twitter 1200×675, LinkedIn 1200×627).
- Website optimization — resize a 4000px camera photo to 1200px display width before uploading to reduce page load time.
- Email attachments — large images exceed email size limits; resizing to 800–1200px makes them shareable.
- Profile pictures — most platforms require square images between 150×150 and 400×400 pixels.
- Print preparation — resize to exact print dimensions (4×6", A4, passport size) at the required DPI.
- Thumbnail generation — create small preview images (100–300px) for galleries and product listings.
Common Image Size Requirements
| Platform / Use | Recommended Size | Aspect Ratio |
|---|---|---|
| Instagram Feed (Square) | 1080 × 1080 px | 1:1 |
| Instagram Story / Reel | 1080 × 1920 px | 9:16 |
| Facebook Post | 1200 × 628 px | 1.91:1 |
| YouTube Thumbnail | 1280 × 720 px | 16:9 |
| Twitter/X Post | 1200 × 675 px | 16:9 |
| LinkedIn Post | 1200 × 627 px | 1.91:1 |
| Website Hero Banner | 1920 × 1080 px | 16:9 |
| Passport Photo (India) | 600 × 600 px (2×2") | 1:1 |
How to Resize an Image Online
- Upload your image — drag and drop or click to browse. Supports JPG, PNG, WebP, GIF up to 10MB.
- Set target dimensions — enter width and height in pixels, or use percentage (e.g., 50% to halve the image).
- Lock/unlock aspect ratio — keep the aspect ratio checked to maintain proportions, or uncheck to stretch freely.
- Choose output format — keep the original format or convert to JPG, PNG, WebP, or GIF during resize.
- Click Resize — the server processes your image and shows original vs resized dimensions and file size.
- Download — click Download to save the resized file directly to your device.
Resize vs Crop vs Compress — When to Use Each
Resize
Changes the pixel dimensions of the entire image. Use when you need a specific width/height (e.g., 1080px for Instagram) or want to scale camera photos down for web compatibility.
Crop
Removes pixels from the edges to focus on a specific area. Use when you want to change aspect ratio or eliminate background distractions without scaling the subject.
Compress
Reduces file size without changing dimensions. Use when the image is already the right size but the file is too large for web/email.
Image Resizing Tips
- Always resize down, never up — making a 500px image into 2000px creates blurry results. Start with the largest version.
- Maintain aspect ratio unless you specifically need a stretched look. Entering mismatched dimensions without locking aspect ratio will distort the image.
- Resize before compressing — resize to target dimensions first, then compress for minimum file size.
- Use WebP output for web images — resizing and converting to WebP simultaneously gives you the best quality-to-size ratio.
- Check DPI for print — web images need 72 DPI, print needs 300 DPI. Resizing pixel dimensions without considering DPI can produce blurry prints.