Show HN: ResizeImage.dev – A fast image resizer runs in browser • Hacker News Board

Show HN: ResizeImage.dev – A fast image resizer runs in browser

#1

Post by wainguo » Fri, Oct 24, 2025, 12:41 PM UTC

Hey HN

I built ResizeImage.dev that runs 100% client-side — nothing gets uploaded, and it’s instant.

What it does

Resize, crop, and optimize images directly in your browser

Supports JPG, PNG, WebP

Works offline (PWA-ready)

No tracking, no server, no data collection

How it works

It uses the Canvas API and WebAssembly codecs to process everything locally. All transformations happen in-memory, so no files ever leave your machine.

Why I built it

I needed a simple, no-BS way to resize images for web and social media — something fast, private.

Try it

https://resizeimage.dev

Feedback welcome

I’d love feedback from the HN community

Thanks for reading!

Show HN: ResizeImage.dev – A fast image resizer runs in browser
resizeimage.dev

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#2

Post by cranberryturkey » Fri, Oct 24, 2025, 1:20 PM UTC

Original size: 58.3 KB

New size: 63.3 KB

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#3

Post by wainguo » Fri, Oct 24, 2025, 3:51 PM UTC

cranberryturkey wrote: post #2

Original size: 58.3 KB New size: 63.3 KB

Yes, File size maybe increase, if you want shrink file size maybe you will find this helpful: https://bulkresizeimages.online/

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#4

Post by cranberryturkey » Fri, Oct 24, 2025, 5:41 PM UTC

wainguo wrote: post #3

cranberryturkey wrote: post #2

Original size: 58.3 KB New size: 63.3 KB

Yes, File size maybe increase, if you want shrink file size maybe you will find this helpful: https://bulkresizeimages.online/

so what does "ResizeImage" mean?

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#5

Post by wainguo » Fri, Oct 24, 2025, 10:05 PM UTC

cranberryturkey wrote: post #4

wainguo wrote: post #3

Earlier quoted context omitted.

Yes, File size maybe increase, if you want shrink file size maybe you will find this helpful: https://bulkresizeimages.online/

so what does "ResizeImage" mean?

Resize could be ether dimensions or file size, resize is a bit （Homographic pun）

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#6

Post by cranberryturkey » Sat, Oct 25, 2025, 12:06 AM UTC

wainguo wrote: post #5

cranberryturkey wrote: post #4

Earlier quoted context omitted.

so what does "ResizeImage" mean?

Resize could be ether dimensions or file size, resize is a bit （Homographic pun）

so does it use ai to scale up or something?

Re: Show HN: ResizeImage.dev – A fast image resizer runs in browser

#7

Post by wainguo » Sat, Oct 25, 2025, 2:04 AM UTC

cranberryturkey wrote: post #6

wainguo wrote: post #5

Earlier quoted context omitted.

Resize could be ether dimensions or file size, resize is a bit （Homographic pun）

so does it use ai to scale up or something?

do not use ai，it just crop image， or adjust image dimensions and file size if bulk，it use in browser ability to complete the tasks