Every creator knows the pain: each platform wants a different image size. Instagram 1080x1080, TikTok 1080x1920, Twitter 1600x900, YouTube 1280x720, LinkedIn 1200x627... Resizing one photo for five platforms usually means opening an editor, remembering each spec, and exporting five times. Worse, most online "resize" tools upload your image to a server first - which is slow, and a privacy concern if the photo isn't meant to leave your device.
That's why I built imgsize, a 100% browser-based image resizer. Your image never leaves your device. Pick a platform preset (70+ included), and it's resized instantly with the exact dimensions that platform wants.
Why browser-only processing matters
- No uploads - your photos stay on your device. Great for personal documents, ID photos, or anything sensitive.
- No login, no signup - just open the page and resize.
- Fast - processing happens locally, so there's no waiting on a server round-trip.
- Works anywhere - desktop, tablet, phone; no install needed.
A quick example
Say you need a cover for an Instagram post:
- Open imgsize
- Choose the Instagram Post preset (1080x1080)
- Drop your image
- Download - done. Nothing was uploaded.
Under the hood
It uses the browser's built-in canvas and image APIs, so everything runs client-side. No server, no tracking pixels, no file left behind.
If you're a web developer, you might also like the approach: it's a nice example of doing image processing entirely in the browser with the Canvas API.
Got a platform I'm missing? The preset list is always growing - let me know and I'll add it.
Top comments (0)