Image Resizer — Free Online Tool
Resize any image by pixels, percentage, or choose from popular social media presets. Supports JPG, PNG, WebP. Works instantly in your browser — no upload, no account needed.
Drop your image here
or click to browse — JPG, PNG, WebP supported
Select Image3 Resize Modes
Resize by exact pixels, by percentage (50%, 75%, 200%), or pick from 15+ social media size presets.
Aspect Ratio Lock
Lock the aspect ratio to prevent distortion. Changing width or height automatically adjusts the other proportionally.
100% Private
Your image never leaves your device. All resizing happens locally in your browser using the Canvas API.
How to Resize an Image Online — Step by Step
- Click "Select Image" or drag and drop your image into the upload box above
- Choose your resize mode — by pixels, by percentage, or pick a social media preset
- Enter your target width or height (aspect ratio is locked by default to prevent distortion)
- Choose output format — JPG for photos, PNG for graphics, WebP for web use
- Click "Resize Image" — preview appears instantly
- Click "Download Image" to save the resized file
What is the Best Image Size for Social Media?
- Facebook Profile Photo: 180 × 180 px
- Facebook Cover Photo: 1640 × 856 px
- Instagram Post: 1080 × 1080 px (square)
- Instagram Story: 1080 × 1920 px
- Twitter/X Profile Photo: 400 × 400 px
- Twitter/X Header: 1500 × 500 px
- LinkedIn Profile Photo: 400 × 400 px
- YouTube Thumbnail: 1280 × 720 px
- WhatsApp Profile Photo: 500 × 500 px
Does Resizing an Image Reduce Quality?
Making an image smaller (downscaling) maintains quality well, especially at 85%+ quality setting. Making an image larger (upscaling) can cause blurriness because the tool must invent new pixels — for best upscaling results, use 100% quality. Always try to start with the largest version of your image available.
What Output Format Should I Choose?
Choose JPG for photographs and images with many colors — it produces the smallest file size. Choose PNG for logos, screenshots, or images with text and sharp edges — it maintains sharpness without compression artifacts. Choose WebP for websites — it gives the best balance of quality and small file size and is supported by all modern browsers.
How to Resize Images for WhatsApp, Email, or Upload
Many platforms have maximum file size or dimension limits. For WhatsApp, resize images to under 1600px wide and use 80% quality JPG. For email attachments, keep images under 1MB total. For website uploads, 1200px wide at WebP format gives the best results for both quality and page load speed.