Images and communication
Free Image Resizer
Social media size presets + custom dimensions
🔒 See this tool’s privacy notes for local processing and external service details. Site analytics are described in our privacy policy.
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Drag & drop image here, or click to select
Quick guide
What can Image Resizer help you do?
Free online image resizer with social media presets for Instagram, Facebook, YouTube, and more. Enter custom dimensions or lock aspect ratio. Output JPG/PNG/WebP.
Best for
Use exact dimensions for an IG post at 1080×1080, Story at 1080×1920, YouTube thumbnail at 1280×720, or enter custom dimensions for a site.
How to use it
Pick a preset or enter width and height from 1 to 8000 px. Keep Lock Aspect Ratio for custom work, then choose JPG, PNG, or WebP at the default 85%.
How to read the result
The preview shows source and output pixels. A 1080×1080 preset stretches a banner; it does not crop it.
Privacy and limits
Canvas redraws the local source without uploading it. Refresh clears the preview; check shared-device download history.
Upscaling cannot restore detail. Use PNG for transparency; JPG removes it. Recheck platform sizes.
Frequently Asked Questions
Will quality be reduced?
Bicubic interpolation is used for smooth results. PNG is lossless.
What presets are available?
Instagram post, Instagram story, Facebook post, YouTube thumbnail, Twitter/X, and more.
Are images uploaded?
No, everything runs in your browser.
Can I lock the aspect ratio?
Yes, check "Lock Aspect Ratio" — changing one dimension updates the other automatically.
Can I preserve transparency?
Yes, choose PNG output to keep alpha channel transparency.