How do I generate subtitles automatically?

Sign up for free, upload your video or audio file, and FlowSub automatically generates accurate subtitles using OpenAI Whisper AI. The process usually takes 1–3 minutes. Download in SRT, VTT, ASS, or TXT format.

Is FlowSub free to use?

Starter ($8.99/mo) covers full transcription + FFmpeg tools. Pro ($16.99/mo) unlocks all AI generation: voice, music, image, video. Elite ($29.99/mo) includes everything with double the credits.

What video and audio formats are supported?

FlowSub supports MP4, MKV, MOV, AVI, WebM (video) and MP3, WAV, M4A, OGG (audio). Maximum file size is 500 MB.

How accurate is AI subtitle generation?

FlowSub uses OpenAI Whisper, achieving near human-level accuracy on clear audio. Accuracy depends on audio quality, speaker clarity, and background noise.

Can I get subtitles in multiple languages?

Yes. Whisper supports 29+ languages and auto-detects the spoken language. Pro users can also translate subtitles into any language on demand.

What subtitle formats does FlowSub export?

SRT (most compatible), VTT (web standard), ASS (advanced styling, Pro), and TXT (plain transcript). All formats generated with every transcription.

Free — No Sign-Up Required

Transcribe Interview to Text

Convert interview recordings to searchable text. Find key quotes without scrubbing through hours of audio. Used by journalists, researchers, and recruiters.

No credit cardFirst file freeNo watermark500 MB free

Drop your file here

or click to browse

Subtitle: SRT, VTT, ASS, TXT, CSV · Video: MP4, MKV, WebM, MOV · Audio: MP3, WAV, AAC, FLAC · Free, no sign-up

⚡ Under 3 minutes🔒 No watermark, ever💰 8× cheaper than Veed✅ No sign-up for first file

How to use this tool

Three easy steps. No sign-up needed for your first file.

Upload interview

MP3, WAV, M4A, or video. Supports files up to 500 MB (4+ hours of audio).

AI transcribes with timestamps

Whisper generates word-level timestamps — click any word to jump to that moment.

Search & export

Full-text search across the transcript. Export as SRT, VTT, TXT, or copy quotes directly.

Frequently asked questions

How do I find specific quotes?

After transcription, open the transcript in FlowSub's editor. Use Ctrl+F to search for keywords. Click any timestamp to jump to that moment in the audio.

Can it tell speakers apart?

Whisper transcribes all speech but doesn't label speakers. Pro plan users can manually label speakers in the editor. Automatic speaker diarization is planned.

How secure are my interviews?

Files are encrypted in transit (TLS) and at rest (AES-256 in Cloudflare R2). Transcripts are automatically deleted 7 days after processing. No human reviews your audio.

What if the interview has background noise?

Whisper handles moderate background noise well. For noisy recordings, use our Noise Remover tool first (1 credit), then transcribe.

Related free tools

Add Subtitles to Video

Add subtitles to any video — free and with zero watermarks. Unlike Veed and Kapwing, we never brand your content. Upload video + SRT, download captioned video.

Try free →

Audio Noise Remover

Remove background noise from audio and video files. FFT-based denoising eliminates fan hum, AC noise, street sounds, and static. Free, no sign-up.

Try free →

Burn Subtitles into MP4

Hardcode SRT, VTT, or ASS subtitles directly into your MP4 video. No re-encoding step needed. Powered by FFmpeg — same engine used by Netflix.

Try free →

Change Video Resolution

Resize video resolution online — 4K to 1080p, 1080p to 720p, or any custom dimensions. Free, no watermark, no sign-up.

Try free →

Compress Video

Compress video files online without losing noticeable quality. Reduce MP4, MKV, MOV by up to 85%. Free, no watermark, no sign-up.

Try free →

Compress Video for Discord

Compress any video to fit Discord's 10 MB file limit. No quality guessing — we target exact file size with smart bitrate adjustment.

Try free →

Ready to use Transcribe Interview to Text?

First file free — no sign-up. Create a free account to unlock all features, larger files, and 5 free credits.

Transcribe Interview Free ← Back to all free tools

Free — No Sign-Up Required

Transcribe Interview to Text

Convert interview recordings to searchable text. Find key quotes without scrubbing through hours of audio. Used by journalists, researchers, and recruiters.

No credit cardFirst file freeNo watermark500 MB free

Drop your file here

or click to browse

Subtitle: SRT, VTT, ASS, TXT, CSV · Video: MP4, MKV, WebM, MOV · Audio: MP3, WAV, AAC, FLAC · Free, no sign-up

⚡ Under 3 minutes🔒 No watermark, ever💰 8× cheaper than Veed✅ No sign-up for first file

How to use this tool

Three easy steps. No sign-up needed for your first file.

Upload interview

MP3, WAV, M4A, or video. Supports files up to 500 MB (4+ hours of audio).

AI transcribes with timestamps

Whisper generates word-level timestamps — click any word to jump to that moment.

Search & export

Full-text search across the transcript. Export as SRT, VTT, TXT, or copy quotes directly.

Frequently asked questions

How do I find specific quotes?

After transcription, open the transcript in FlowSub's editor. Use Ctrl+F to search for keywords. Click any timestamp to jump to that moment in the audio.

Can it tell speakers apart?

Whisper transcribes all speech but doesn't label speakers. Pro plan users can manually label speakers in the editor. Automatic speaker diarization is planned.

How secure are my interviews?

Files are encrypted in transit (TLS) and at rest (AES-256 in Cloudflare R2). Transcripts are automatically deleted 7 days after processing. No human reviews your audio.

What if the interview has background noise?

Whisper handles moderate background noise well. For noisy recordings, use our Noise Remover tool first (1 credit), then transcribe.

Related free tools

Add Subtitles to Video

Add subtitles to any video — free and with zero watermarks. Unlike Veed and Kapwing, we never brand your content. Upload video + SRT, download captioned video.

Try free →

Audio Noise Remover

Remove background noise from audio and video files. FFT-based denoising eliminates fan hum, AC noise, street sounds, and static. Free, no sign-up.

Try free →

Burn Subtitles into MP4

Hardcode SRT, VTT, or ASS subtitles directly into your MP4 video. No re-encoding step needed. Powered by FFmpeg — same engine used by Netflix.

Try free →

Change Video Resolution

Resize video resolution online — 4K to 1080p, 1080p to 720p, or any custom dimensions. Free, no watermark, no sign-up.

Try free →

Compress Video

Compress video files online without losing noticeable quality. Reduce MP4, MKV, MOV by up to 85%. Free, no watermark, no sign-up.

Try free →

Compress Video for Discord

Compress any video to fit Discord's 10 MB file limit. No quality guessing — we target exact file size with smart bitrate adjustment.

Try free →

Ready to use Transcribe Interview to Text?

First file free — no sign-up. Create a free account to unlock all features, larger files, and 5 free credits.

Transcribe Interview Free ← Back to all free tools