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About 11API

Built to make voiceovers less annoying.

11API is a free, browser-based tool for generating AI voiceovers with ElevenLabs or Gemini and placing those lines exactly where they belong on a video timeline.

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Generate in one place

Write your lines, choose a voice, generate audio, and keep the project close to the video you're working on.

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Built around timing

Voiceover is treated as a timeline element, so start and end points are part of the workflow instead of an afterthought.

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Less friction

No sign-up flow or separate dashboard. The goal is simply to get from script to usable narration faster.

01 / Product

What 11API does

11API lets you generate natural-sounding voiceovers using ElevenLabs or Gemini, then line each voice line up against a video's timeline by adjusting where it starts and ends.

It also works without a video. Use the voiceover-only workflow to write and generate standalone lines, then download the audio when you're finished.

02 / Design choice

Why it's built this way

11API is deliberately browser-based. You bring your own provider API key, the key is stored in your browser's local storage, and requests go directly from your browser to the provider you selected.

Your video is processed in the browser rather than being uploaded to an 11API backend. That keeps the product focused on the editing task without adding another account or cloud workspace to manage.

03 / Simple workflow

From idea to finished line

  • Choose ElevenLabs or Gemini and add your own API key.
  • Select a voice and write the line you want generated.
  • Drop in a video when you need timeline-based editing.
  • Place or adjust each line, preview the timing, then export the audio.

Ready to make a voiceover?

Open 11API, bring your ElevenLabs or Gemini key, and start creating without a sign-up.

Open 11API