PrismPoster Creator Tools

PrismPoster Creator Tools gives Claude the exact numbers behind video and social media work, so answers about sizes, safe areas and timing come from a sourced dataset instead of memory.

What you can ask:

• "What size is an Instagram Reel, and where does the caption area start?" Frame size, aspect ratio and safe-area insets for 19 placements across Instagram, TikTok, YouTube, Facebook, LinkedIn and X. Each comes with the official page the figures were taken from.
• "Will my logo at these coordinates be covered by the YouTube Shorts buttons?" Checks any caption, logo or button against a placement's safe area and says by how many pixels it intrudes on each side.
• "My footage is 1920×1080. How do I fit it to a 9:16 Story?" Works out the aspect ratio plus a centre-crop or letterbox plan.
• "What bitrate keeps a 45-second clip under 25 MB?" Calculates file size from bitrate, or the highest bitrate that fits a size cap.
• "Convert these subtitles to WebVTT." Converts subtitle text between SRT and WebVTT.
• "I tapped these beats. What's the tempo, and how long are 8 bars?" Estimates BPM from taps, with delay times for every note value and bar lengths.

Every tool is read-only and needs no account or sign-in. It works on the numbers you give it and does not upload, store or change anything. Where a platform publishes no fixed safe area (TikTok), the tools say so and give the reason instead of a guess.

The calculations are open source (MIT) at github.com/PrismPoster/creator-tools, and the placement dataset is published with a DOI. The same tools are free on prismposter.com/tools.