Five local tools, no login and no Overlay URL
These five tools help you size an OBS Browser Source, choose a StreamLyric layout, understand when Karaoke can run, keep the Overlay URL private, and prepare a TikTok LIVE scene. Each answers one planning question before you go live.
Every tool runs in your browser. None asks for an account, none asks for the Overlay URL, and none calls a YouTube or TikTok API. Nothing you type is uploaded, so the tools are safe to use before you have even installed the extension.
They compute from your inputs, not from your account
The size calculator and layout recommender take scene inputs—canvas, margin, orientation, plan tier—and return a recipe. They do not read your current song, your Overlay state, or your billing.
The Karaoke explainer and the two checklists document product rules and pre-stream steps. They describe what the shipped Overlay does, so the answers stay honest even when a specific track has no synced lyrics.
Which tool for which question
Use the size calculator when you know the canvas but not the source size. Use the layout recommender when you have leftover space after cameras and comments. There are only 3 layouts, so the recommender never invents a fourth.
Use the Karaoke explainer before promising a word-by-word fill, the privacy checklist before sharing a screenshot, and the TikTok LIVE checklist before publishing a vertical singing stream.
Frequently asked questions
Do I need to sign in?
No. Every tool is usable without an account.
Will the tool request my Overlay link?
No. Treat that URL as a credential and keep it in OBS only.
Do these tools call YouTube or TikTok?
No. They compute locally from the inputs you provide and never query a platform API.