# Video Joiner_ Stitch several clips into one, drop on a logo, reframe to 9:16 or 16:9, and cover a watermark — all in your browser, with nothing uploaded. Powered by FFmpeg compiled to WebAssembly, so your footage never leaves your device. **Drop videos** or click to choose MP4 / MOV / WebM · added in order, reorderable below ## How it works & the honest limits Each clip is reframed to your chosen aspect ratio (cropping to fill, or padding with bars to fit), your logo is overlaid, and the optional cover region is blurred. The processed clips are then concatenated into a single MP4 — all locally, using [FFmpeg.wasm](https://ffmpegwasm.netlify.app/). **It’s slow.** Browser video encoding has no GPU acceleration and limited memory, so long or high-resolution files can take minutes or run out of memory. Trim clips first and keep the total modest. Output is 720p H.264 for broad compatibility. **About “removing” a watermark.** No tool can cleanly erase a watermark baked into video; the realistic technique is to blur or cover the area, which is what this does. Use it only on footage you own or are licensed to edit — stripping someone else’s mark or attribution may infringe their rights. ## Accessibility ### Screen reader support --- *Source: [ocxly.com/videojoiner.html](https://ocxly.com/videojoiner.html) — OCXLY, free 100% client-side privacy-first tools. Join videos, add a logo, reframe to 9:16 or 16:9, and blur a watermark region — in your browser with FFmpeg.wasm. No uploads.*