Free Online Photo Resizer
Quickly resize your images for social media, emails, or websites. Our tool lets you adjust the dimensions of your photos by pixels or percentage, all while maintaining quality and aspect ratio. It's fast, free, and secure.
Image by Steve Johnson on Pexels.
How to Resize Your Image
- Upload Your Photo: Click the upload box below and select an image file (JPEG, PNG, WEBP) from your device.
- Choose Your Dimensions: Enter your desired width or height in pixels. If "Maintain Aspect Ratio" is checked, the other dimension will update automatically.
- Select Output Format: Choose to save your image as a JPEG, PNG, or WEBP. Adjust the quality slider if you select JPEG.
- Download Your Image: Click the "Download Resized Image" button to save your new photo.
Click to Upload an Image
or drag and drop a file here
Preview
Resize Options
Understanding Image Resizing
Resizing an image correctly is key to maintaining its quality. Here are the core concepts:
Pixels & Dimensions
A digital image is made up of thousands of tiny dots called pixels. The dimensions of an image are its width and height in pixels (e.g., 1920 x 1080). When you resize an image, you are changing the number of pixels it contains.
Aspect Ratio
The aspect ratio is the proportional relationship between an image's width and height. For example, a 4x6 photo has the same aspect ratio as an 8x12 photo. Keeping the aspect ratio locked prevents your image from being stretched or distorted when you change its size.
Popular Use Cases for Image Resizing
Social Media Posts
Each platform has optimal image sizes. Instagram prefers square (1080x1080) or portrait (1080x1350), while Twitter works best with 1200x675. Properly sized images display without cropping and look more professional.
Email Attachments
Large photos can bounce or slow down emails. Resize images to under 1MB for smooth sending. A width of 800-1200px is usually sufficient for email viewing while keeping file sizes manageable.
Website Optimization
Oversized images slow down websites and hurt SEO. Resize photos to the actual display size needed (e.g., 800px wide for blog content) to improve page load speed and user experience.
Printing Photos
For high-quality prints, you need sufficient resolution. A 4x6 inch print needs at least 1200x1800 pixels at 300 DPI. Larger prints need proportionally more pixels to avoid blurriness.
Social Media Image Size Guide
Use these recommended dimensions to ensure your images display perfectly on each platform:
| Platform | Type | Dimensions | Ratio |
|---|---|---|---|
| Square Post | 1080 × 1080 | 1:1 | |
| Portrait Post | 1080 × 1350 | 4:5 | |
| Story / Reel | 1080 × 1920 | 9:16 | |
| Post / Link | 1200 × 630 | 1.91:1 | |
| Cover Photo | 820 × 312 | 2.63:1 | |
| Twitter/X | Post | 1200 × 675 | 16:9 |
| Post | 1200 × 627 | 1.91:1 | |
| Pin | 1000 × 1500 | 2:3 | |
| YouTube | Thumbnail | 1280 × 720 | 16:9 |
| YouTube | Channel Banner | 2560 × 1440 | 16:9 |
Tips for Best Results
Downsize, Don't Upsize
Always start with a larger image and make it smaller. Enlarging a small image creates blurriness because pixels must be invented. If you need a large image, find or create a higher resolution original.
Lock Aspect Ratio
Keep "Maintain aspect ratio" checked to prevent stretching. If you need a different shape, crop the image first in a photo editor, then resize to your target dimensions.
Choose the Right Format
JPEG: Best for photos, smallest files. PNG: Best for graphics, logos, screenshots (supports transparency). WEBP: Modern format with great compression and quality.
Adjust Quality Wisely
For JPEG, 80-90% quality is usually indistinguishable from 100% but with much smaller file size. Only use 100% if you're archiving or will edit further.
Frequently Asked Questions (FAQs)
Will resizing my image reduce its quality?
Making an image smaller (downsizing) generally maintains quality well. However, making an image significantly larger (upsizing) than its original dimensions can cause it to look blurry or "pixelated" because the software has to guess what the new pixels should look like.
What's the best image format to use: JPEG or PNG?
Use JPEG for photos with many colors and gradients, as it provides excellent compression. Use PNG for images with sharp lines, text, or transparent backgrounds, as it preserves detail perfectly without loss of quality.
Is my uploaded photo secure?
Yes. This tool is 100% private. Your image is never uploaded to a server. All resizing is done directly on your computer within your web browser. When you close this page, your image is gone.
What image type will the output be?
You can choose to download your resized image as a JPEG (.jpg), PNG (.png), or WEBP (.webp) file. JPEG is great for photos, PNG is best for graphics with transparency, and WEBP offers excellent quality at a smaller file size.
What does DPI/PPI mean for images?
DPI (dots per inch) and PPI (pixels per inch) describe print resolution. For web use, only pixel dimensions matter. For printing, 300 DPI is standard for high quality. A 3000x2000 pixel image prints at 10x6.67 inches at 300 DPI.
Why does my resized image look blurry?
Blurriness happens when you enlarge an image beyond its original dimensions. The software has to create new pixels that didn't exist, resulting in a soft or pixelated appearance. Always start with the largest possible source image.
Can I resize multiple images at once?
This tool handles one image at a time for simplicity and privacy. For batch resizing, desktop software like GIMP (free) or Adobe Photoshop offers batch processing capabilities.
Is there a file size or dimension limit?
Since processing happens in your browser, there's no server limit. However, very large images (over 10MB or 8000+ pixels) may be slow on older devices. For best performance, we recommend images under 5MB.
Related Tools
Add Text to Image
Create social media graphics, quotes, and title cards by adding beautiful text overlays to your photos. Perfect for Instagram posts, thumbnails, and announcements.
YouTube Revenue Calculator
Estimate potential earnings from your YouTube videos based on views, CPM, and engagement. Helpful for content creators planning their strategy.