---
url: https://superduperai.co/tools/safe-zone/
title: "Safe-zone and aspect-ratio overlay"
description: "Drop a frame or a video and see the TikTok, Reels and Shorts UI zones over it; crop and pad numbers between 16:9, 9:16, 4:5 and 1:1 with the ffmpeg line."
lang: en
type: tool
category: prepare
---

# Safe-zone and aspect-ratio overlay

Drop a frame or a video and see the TikTok, Reels and Shorts UI zones over it; crop and pad numbers between 16:9, 9:16, 4:5 and 1:1 with the ffmpeg line.

Runs entirely in your browser: no account, no upload, no API key.

## Related tools

- [Frame grabber](https://superduperai.co/tools/frame-grabber/): Pick frames from a video for a first-frame or a thumbnail: scrub, grab, compare on a contact sheet, download PNGs. The file never leaves your browser.
- [Caption reading-speed checker](https://superduperai.co/tools/caption-checker/): Paste an SRT: words per second per cue, lines over the limit, and how long a voice-over takes to say.

More for agents: https://superduperai.co/llms.txt · MCP server: https://superduperai.co/mcp