Auto Subtitle Generator Online Free — AI-Powered SRT

Generate accurate SRT subtitles from any audio or video using AI. 100% free, runs in your browser. No upload, no hidden costs. Powered by Whisper AI.

Generate Accurate SRT Files From Any Audio or Video

File Studio uses OpenAI's Whisper AI model — running entirely in your browser — to transcribe speech into accurately timed SRT subtitle files. Upload any audio or video file, and the AI processes it locally on your device. The generated SRT file includes timestamps synchronised to the spoken words, ready for import into video editors like Premiere Pro, DaVinci Resolve, or online platforms like YouTube and Vimeo.

Powered by Whisper AI — Runs in Your Browser

Unlike cloud-based transcription services that charge per minute of audio, File Studio downloads the Whisper AI model once to your browser cache and runs all subsequent transcriptions locally. This means unlimited free transcription with no API costs, no per-minute fees, and no data leaving your device. Processing speed depends on your hardware — modern laptops with dedicated GPUs achieve near-real-time transcription.

No Server, No Hidden Fees, No Account

File Studio's subtitle generator requires no account creation, no email verification, and no payment information. The AI model runs on your device's hardware, eliminating the cloud infrastructure costs that other services pass on to users. Transcribe as many files as you want, as often as you want, completely free. Your audio content remains private because it never leaves your computer.

Frequently Asked Questions

How do I generate subtitles from audio for free?
Upload your audio or video file, click Generate Subtitles, and wait for the AI to transcribe it. Download the SRT file when complete. The AI model runs entirely in your browser.
Is the subtitle generator really free with no limits?
Yes. Because the Whisper AI model runs locally on your device, there are no cloud API costs. Processing time depends on your hardware — faster CPUs and GPUs process audio more quickly.
Does it upload my audio to a server?
No. The Whisper AI model is downloaded to your browser cache once, and all subsequent transcription happens on your device. Your audio never leaves your computer.
Which languages are supported?
Whisper AI supports 99+ languages. Simply upload audio in any language and it will transcribe it automatically.
Are my files uploaded to a server?
No. File Studio is built on a strict local-first architecture. Every PDF operation — merging, splitting, compressing, redacting — runs entirely inside your browser using JavaScript. Your files never leave your computer. You can even disconnect your internet after the page loads and the tools will continue working perfectly.
Is File Studio completely free?
Yes, 100% free with no limits. There are no file size caps, no daily limits, no watermarks added to your output, and no account or email required. All tools are free forever.
Does it work on mobile and tablet?
Yes. File Studio is fully responsive and works on Android and iOS browsers. All processing happens locally on your phone's or tablet's hardware.

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