Image Resizer — Free Online
Resize images for Instagram, YouTube, LinkedIn, WhatsApp and more. Custom dimensions, batch resize, format conversion — 100% browser-based. Your files never leave your device.
Why Use SketchValley's Image Resizer?
100% Private
Runs entirely in your browser via Canvas API. Your images never touch any server.
Batch Resize
Drop multiple images, apply one setting, download a ZIP in seconds.
Platform Presets
Accurate dimensions for Instagram, YouTube, LinkedIn, WhatsApp, Amazon and more.
Target File Size
Need under 100KB? Enable target size and the tool auto-adjusts quality to match.
Social Media Image Size Guide 2026
| Platform | Type | Size (px) |
|---|---|---|
| Post (Square) | 1080 × 1080 | |
| Story / Reels | 1080 × 1920 | |
| YouTube | Thumbnail | 1280 × 720 |
| YouTube | Channel Banner | 2560 × 1440 |
| Cover Photo | 1584 × 396 | |
| X (Twitter) | Header | 1500 × 500 |
| Cover Photo | 820 × 312 | |
| Profile Photo | 500 × 500 | |
| Amazon | Product Image | 2000 × 2000 |
| Shopify | Product Image | 800 × 800 |
Frequently Asked Questions
Does this upload my images anywhere?
No. The entire tool runs in your browser using the HTML5 Canvas API. Your files never leave your device — not even to our servers.
What's the difference between Contain, Cover and Stretch?
Contain fits the image inside the canvas while keeping all content visible (may add padding). Cover fills the canvas completely, cropping edges if needed. Stretch ignores the original ratio and fills the exact size.
How do I resize an image to under 100KB?
Open Advanced options, enable "Target file size", enter 100 KB, then click Resize & Download. The tool automatically adjusts JPEG compression to hit your target.
Can I resize multiple images at once?
Yes. Drop multiple files into the upload area. The "All images → ZIP" button will appear. Click it to resize all files with the same settings and download them in one ZIP.
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