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In-Browser AI Subtitle Generator
Generate, edit and burn AI captions in your browser
A free AI-powered caption and subtitle generator that runs entirely in your browser. Automatically transcribe videos and audio with Whisper AI, supporting around 99 languages, word-level timestamps, and optional translation into English. Choose between Fast, Balanced, and Accurate AI models, edit captions directly, and export SRT, VTT, or plain-text transcripts. No signup, no watermark, no per-minute charges, & no file uploads. Your videos, audio, and transcripts never leave your device.
We're excited to launch our latest free tool: AI Caption Generator by VdoCipher.
Why we built this
At VdoCipher, we've spent 10+ years building video infrastructure, helping thousands of platforms securely host, protect, and deliver video content.
One recurring frustration we've noticed among course creators, educators, marketers, and video teams is how expensive and inconvenient automatic caption generation can be.
You have a recorded lecture, a podcast, an interview, or a marketing video. You just want accurate subtitles.
But many online caption generators require you to upload your video to their servers, create an account, and pay based on the number of minutes you transcribe.
And if you're working with unreleased courses, internal recordings, confidential interviews, or private videos, uploading your content to an unfamiliar server isn't always an option.
Even after paying, you may still need another tool to edit subtitle timings, export an SRT file, or permanently add captions to your video.
So we built something different.
A completely free AI caption generator that runs locally in your browser using OpenAI's Whisper speech recognition model.
No video uploads, no subscriptions, no per-minute charges, and no watermark.
Here's what it can do:
AI-powered captions: Automatically generate subtitles from video and audio using Whisper AI, with word-level timestamps.
99 languages: Transcribe speech in around 99 languages, including English, Hindi, Spanish, French, German, Arabic, and more.
Three AI models: Choose Fast for quick drafts, Balanced for everyday use, or Accurate for challenging audio.
Translate to English: Generate English captions from speech in other supported languages.
Built-in subtitle editor: Review and correct transcribed words before downloading.
Multiple export formats: Download subtitles in SRT, VTT, or plain text.
Batch caption generation: Process multiple video or audio files in one session.
Burn subtitles into videos: Permanently add captions to the video itself and export a ready-to-share MP4.
Private by design: All transcription, editing, and video processing happen locally using WebAssembly and WebGPU where supported.
And there's one important difference from most AI caption generators:
Your video and audio never leave your device.
Whisper runs directly in your browser rather than sending your content to a cloud transcription API.
The AI model downloads the first time you use it and is cached locally for subsequent sessions.
So you're not paying by the minute or waiting for your video to upload before transcription can begin.
Who it's for
Course creators adding subtitles to educational videos, YouTubers captioning their content, podcasters creating transcripts, marketers preparing videos for social media, journalists transcribing interviews, and anyone who wants accessible video content without paying for another subscription.
It's also useful for teams handling sensitive recordings that they don't want to upload to third-party AI services.
About In-Browser AI Subtitle Generator on Product Hunt
“Generate, edit and burn AI captions in your browser”
In-Browser AI Subtitle Generator was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #97 on the daily leaderboard. A free AI-powered caption and subtitle generator that runs entirely in your browser. Automatically transcribe videos and audio with Whisper AI, supporting around 99 languages, word-level timestamps, and optional translation into English. Choose between Fast, Balanced, and Accurate AI models, edit captions directly, and export SRT, VTT, or plain-text transcripts. No signup, no watermark, no per-minute charges, & no file uploads. Your videos, audio, and transcripts never leave your device.
On the analytics side, In-Browser AI Subtitle Generator competes within Video Streaming, Text Editors and Video — topics that collectively have 30.9k followers on Product Hunt. The dashboard above tracks how In-Browser AI Subtitle Generator performed against the three products that launched closest to it on the same day.
Who hunted In-Browser AI Subtitle Generator?
In-Browser AI Subtitle Generator was hunted by Akash Kandari. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of In-Browser AI Subtitle Generator including community comment highlights and product details, visit the product overview.
Akash Kandari
Hey Product Hunt!
We're excited to launch our latest free tool: AI Caption Generator by VdoCipher.
Why we built this
At VdoCipher, we've spent 10+ years building video infrastructure, helping thousands of platforms securely host, protect, and deliver video content.
One recurring frustration we've noticed among course creators, educators, marketers, and video teams is how expensive and inconvenient automatic caption generation can be.
You have a recorded lecture, a podcast, an interview, or a marketing video. You just want accurate subtitles.
But many online caption generators require you to upload your video to their servers, create an account, and pay based on the number of minutes you transcribe.
And if you're working with unreleased courses, internal recordings, confidential interviews, or private videos, uploading your content to an unfamiliar server isn't always an option.
Even after paying, you may still need another tool to edit subtitle timings, export an SRT file, or permanently add captions to your video.
So we built something different.
A completely free AI caption generator that runs locally in your browser using OpenAI's Whisper speech recognition model.
No video uploads, no subscriptions, no per-minute charges, and no watermark.
Here's what it can do:
AI-powered captions: Automatically generate subtitles from video and audio using Whisper AI, with word-level timestamps.
99 languages: Transcribe speech in around 99 languages, including English, Hindi, Spanish, French, German, Arabic, and more.
Three AI models: Choose Fast for quick drafts, Balanced for everyday use, or Accurate for challenging audio.
Translate to English: Generate English captions from speech in other supported languages.
Built-in subtitle editor: Review and correct transcribed words before downloading.
Multiple export formats: Download subtitles in SRT, VTT, or plain text.
Batch caption generation: Process multiple video or audio files in one session.
Burn subtitles into videos: Permanently add captions to the video itself and export a ready-to-share MP4.
Private by design: All transcription, editing, and video processing happen locally using WebAssembly and WebGPU where supported.
And there's one important difference from most AI caption generators:
Your video and audio never leave your device.
Whisper runs directly in your browser rather than sending your content to a cloud transcription API.
The AI model downloads the first time you use it and is cached locally for subsequent sessions.
So you're not paying by the minute or waiting for your video to upload before transcription can begin.
Who it's for
Course creators adding subtitles to educational videos, YouTubers captioning their content, podcasters creating transcripts, marketers preparing videos for social media, journalists transcribing interviews, and anyone who wants accessible video content without paying for another subscription.
It's also useful for teams handling sensitive recordings that they don't want to upload to third-party AI services.
Try it for free (no signup needed):
https://www.vdocipher.com/tools/caption-generator/