Show HN: An all-in-one image crop/split/collage tool (no uploads, no watermark)

[harperhuang]

Hi HN,

I rebuilt my side project into a small “all-in-one” image toolbox: https://imagesplitter.tools

The part I’m most proud of (and personally use the most) is the collage workflow:

1. Grid collage (templates + merge cells for “one big + many small” layouts)

2. Long-image stitching (great for screenshots / step-by-step guides / chat logs)

3. Freeform collage (DIY your own grid layout — split/merge cells however you want — then apply that layout to the grid collage)

My motivation was pretty simple: I kept bouncing between different sites for basic image chores, and many of them add watermarks, require login, or feel sketchy for privacy. So I made this with a few strict rules:

1. Free, no watermark 2. Privacy-first: processing happens locally in the browser (no upload/storage)

Besides collages, it also includes common utilities I often need:

crop (free/aspect/circle/shape), grid split + ZIP export, batch convert (JPG/PNG/WebP/ICO…), compress, images→GIF, text/markdown/html→image, QR generate/decode, color picker, image info, etc.

I’d really love feedback:

1) What’s the most annoying part of making collages / long images?

2) Any “must-have” features you’d expect for this kind of tool?

Thanks for taking a look — happy to iterate based on your comments.

[detectivestory]

Great job! A useful resource, and it works surprisingly well on mobile. I think you should try improve the SEO quite a bit because it looks better than most of what you'll find in a search engine at the moment.

[harperhuang]

Thanks a lot — that really means a lot to me! I’m glad it works well on mobile too. I’m actively working on improving SEO (cleaner landing pages, better descriptions, and more use-case pages). If you have any SEO suggestions or things you think I should prioritize, I’d genuinely love to hear them. Thanks again for the kind words!

[Guestmodinfo]

I think if it's really privacy focussed then it's a really cool thing. But how can I be sure that the server is not storing my images and is completely private and confidential

[harperhuang]

Good question. You can actually verify it: after the page loads, you can go fully offline and all features still work. That’s because everything runs locally in the browser, and there are no image uploads. If you check DevTools → Network while editing, you shouldn’t see any file POSTs either.

[Guestmodinfo]

Thank you so much for this. Your guidance and your tool

[harperhuang]

Really appreciate it — thanks for checking and for the kind words! If you ever spot anything that could be improved, please let me know.