Resize images for any platform
Pick a one-click preset for Instagram, TikTok, YouTube and more — or set a custom pixel size. All in your browser.
How it works
1
Drop your image
Any size, any format — JPG, PNG, or WebP.
2
Pick a preset
Choose Instagram, TikTok, YouTube etc. — or type a custom size.
3
Download
Get your perfectly-sized image, ready to upload.
Why use Toolstack's Image Resizer?
100% private
Your file never leaves your device — everything runs locally in your browser.
Instant
No upload, no queue. The result is ready as soon as your laptop finishes the math.
Free forever
No signup, no credit card, no daily limits for the core features.
Open standards
We use proven open-source libraries — no proprietary lock-in, no shady tracking.