I built a free image splitter for TikTok banners and Instagram grids

I built RepostGrid after seeing a lot of creators use split-grid images across TikTok, Instagram, WeChat, and other social platforms.

The format is simple, but doing it manually is surprisingly fiddly. You need to crop the image, slice it into the right layout, export every tile, and then post everything in the correct order so the grid assembles properly.

RepostGrid is my attempt to make that workflow a small, fast utility:

• upload one image

• choose a TikTok banner, Instagram grid, carousel, or custom layout

• preview the split

• download numbered tiles or a ZIP

It is free, has no watermark, requires no sign-up, and processes images locally in the browser.

I am keeping it intentionally lightweight for now. I would love feedback on the landing page, the posting-order UX, and which creator workflows would be worth supporting next.

Link: https://repostgrid.com/