Social Media Resizer
Resize your images and videos to exact platform specifications for Instagram, YouTube, TikTok, and X with zero server uploads.
100% Local Browser Privacy
All computation happens right in your browser's JavaScript engine. No data is ever sent to any remote server.
Instant Results
Zero network latency. Calculations and formatting are executed instantly with high cryptographic and mathematical precision.
Works Offline
Once loaded, this tool can function completely offline with no active internet connection required.
Frequently Asked Questions
Can I download all social sizes at once?
Yes! Click 'Download All (ZIP)' to batch-generate and download all 10 platform sizes in a single archive.
What is 'Contain with Blurred Backdrop'?
It fits your entire photo without cropping any edges, filling the background letterbox with an aesthetically blurred version of the photo.