I built a free TikTok banner splitter that runs in your browser

Hey everyone, Abdul here. I made RepostGrid (https://repostgrid.com), so this is self-promotion, but I'm mostly after feedback.

Some TikTok creators turn their first three pinned posts (or their Reposts tab) into one continuous banner. Making one is fiddly. You need the right size (3240 × 1440 splits into three 1080 × 1440 tiles), and you have to post the tiles right to left, or the banner reads backwards because TikTok shows the newest post first.

RepostGrid takes care of that:

- Drop in an image and get a 3-tile banner or a 3×3 grid

- Preview it as a TikTok profile, with the view-count and "Pinned" label zones marked

- Tiles are numbered in the order you post them

- No account and no watermark. Everything runs locally with the Canvas API, so nothing gets uploaded

What would make it more useful to you? I'm weighing carousel templates, text presets, and more aspect ratios for other platforms. Tell me what you'd actually use.