Image Resizer Online Free
Resize any image to exact dimensions or choose from 12 social media presets with Image Resizer Online Free. Instant, free, no login — your images never leave your browser.
Uploading an image at the wrong size to Instagram, YouTube, or your blog can cause cropping, blurring, or rejection. This free image resizer gives you the exact dimensions every platform requires — instantly, without uploading your image to any server.
Image Resizer
Resize any image to exact dimensions or choose from social media presets — Instagram, YouTube, Facebook, WhatsApp and more. Free, no login, works in your browser.
🖼️
Click to upload or drag & drop your image
Supports JPG, PNG, WEBP, GIF · Max 20MB
Original
→
Resized Preview
Quick Presets
Custom Size
🔒
How to Resize an Image with Image Resizer Online Free?
1. Click the upload area or drag and drop your image — JPG, PNG, WEBP, or GIF up to 20MB. 2. Choose a Quick Preset (Instagram Post, YouTube Thumbnail, etc.) or enter custom Width and Height values. 3. The lock icon (🔒) keeps your aspect ratio proportional. Click it to unlock and resize freely. 4. Select your Output Format : JPG for photos, PNG for graphics with transparency, WEBP for smallest file size. 5. Select Quality : 90% is recommended for web use — excellent quality at a smaller file size. 6. Click Resize Image — a preview appears instantly showing the exact output dimensions. 7. Click Download to save the resized image to your device.
Social Media Image Size Presets (2026)
| Platform | Format | Size (px) | Aspect Ratio |
|---|---|---|---|
| Square Post | 1080 × 1080 | 1:1 | |
| Portrait Post | 1080 × 1350 | 4:5 | |
| Story / Reel | 1080 × 1920 | 9:16 | |
| YouTube | Thumbnail | 1280 × 720 | 16:9 |
| YouTube | Channel Art | 2560 × 1440 | 16:9 |
| Cover Photo | 820 × 312 | 2.63:1 | |
| Facebook / OG | Shared Image | 1200 × 630 | 1.91:1 |
| Twitter / X | Header | 1500 × 500 | 3:1 |
| Banner | 1584 × 396 | 4:1 | |
| Profile Photo | 512 × 512 | 1:1 | |
| Blog / WordPress | Featured Image | 1200 × 628 | 1.91:1 |
| Product | Square Image | 800 × 800 | 1:1 |
Why Use This Image Resizer?
● Completely free — no account, no subscription, no watermark added to any downloaded image. ● Works entirely in your browser — your images are never uploaded to any server, ensuring complete privacy. ● 12 social media presets — the exact dimensions each major platform recommends in 2026. ● Aspect ratio lock — resize proportionally so images never appear stretched or compressed. ● Three output formats — JPG, PNG, and WEBP. WEBP produces the smallest files for web use. ● Instant preview — see the resized result before downloading so you can verify quality. ● Works on all devices — desktop, tablet, and mobile browser with no installation needed.
Which Format Should I Choose?
| Format | Best For | Transparency Support | Relative File Size |
|---|---|---|---|
| JPG | Photographs, complex colourful images | No | Small |
| PNG | Graphics, logos, screenshots, text-heavy images | Yes | Medium to Large |
| WEBP | All web content — modern format | Yes | Smallest (25-35% smaller than JPG) |