FrameGrab started as a tool for looking at UI animations properly: trim a screen recording to the exact frame and export the stills, at full resolution, from almost any video format. Then I started building with AI coding agents, and hit the obvious gap: they can read your code but can’t see how it moves very well with their default capture tools. So FrameGrab now has an MCP server. Connect Claude Code, Cursor, Codex or any MCP agent and it can: • record the iOS Simulator or a Mac app’s window while it tests, • find the moments where the screen changes, • look at every frame of a transition on one contact sheet, with changes boxed and held frames labelled, • measure how far and how fast an element moves, and whether it overshoots. It’s built to save the agent tokens: one contact sheet instead of 60 separate frames. It’s free, with no account and no tracking. Your videos never leave your Mac. If it saves you time, there’s a tip jar in the app, but everything works without it. It needs macOS 14 or later on Apple silicon. I’d love to hear what you’d use it for, and what’s missing.

FrameGrab

Frame-accurate video, for you and your AI agent

Frame-accurate video, for you and your AI agent