Free Image Resizer
Social media size presets + custom dimensions
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
Useful for quick file work, text cleanup, calculations, content creation, and website or AI checks.
How to use it
Open the tool, enter or upload what it asks for, then copy or download the result directly.
Privacy and limits
Most tools run in your browser with no sign-in. Very large files or older devices may hit browser memory limits.
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.