Image Resizer
Resize images by dimensions, percentage, or file size
How to Resize an Image?
Click on the "Select Image" button to choose an image from your device.
Select dimensions, percentage, or target file size for resizing.
Click the "Resize Image" button and download your resized image.
What is Image Resizing?
Resizer
What it does: Changes the dimensions (width × height) of an image or file.
Effect:
- Reduces (or increases) the pixel size of the image
- Directly changes how big the image appears (resolution)
- Smaller dimensions → smaller file size (indirect compression)
Use case: When you want the image to fit a specific size (e.g., 800×600 for a website thumbnail).
🔹 Example: Changing an image from 4000×3000 pixels → 1000×750 pixels.
Free 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 padlock icon locked to maintain proportions, or unlock it to stretch freely.
- Choose output format — keep the original format or convert to JPG, PNG, or WebP 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 to your device.
Resize vs Crop vs Compress — When to Use Each
Changes the pixel dimensions of the entire image. Use when you need a specific width/height (e.g., 1080px for Instagram) or want to reduce a camera photo from 4000px to web-friendly 1200px.
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.
Reduces file size without changing dimensions. Use when the image is already the right size but the file is too large for web/email. Quality is reduced slightly to achieve smaller files.
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/distorted look. Unlocking ratio and entering mismatched dimensions will squish the image.
- Resize before compressing — resize to target dimensions first, then compress for minimum file size. Compressing a 4000px image and then displaying at 800px wastes bandwidth.
- 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.
Frequently Asked Questions
Resizing down (smaller) preserves quality well because you are discarding pixels. Resizing up (larger) reduces perceived quality because the software must interpolate new pixels that did not exist in the original. For best results, always resize downward from a high-resolution source.
Upload JPG, PNG, WebP, or GIF files up to 10MB. Output can be saved in the same format or converted to JPG, PNG, or WebP during the resize operation.
Yes, completely free. No account, no sign-up, no watermarks, and no limits on the number of images you resize.
No. Images are processed and the temporary resized file is automatically deleted shortly after. We never store, view, or share your images.
This tool resizes by pixel dimensions. To target a specific file size, first resize to smaller dimensions, then use our Image Compressor to further reduce the file size by adjusting quality.