1
Import
Choose a video or audio file. MP4, MOV, WebM, MKV, MP3, WAV, and more are supported.
AI subtitle generator
AI Subtitles in Seconds. No Sign-Up. No Watermark.
Subtitle Caption Studio uses fast cloud AI to transcribe and translate your media in 20 languages. Edit every word, style every caption, and export clean SRT or VTT files — no account needed, ever.
Free to start. No subscription. No watermark on exports.
- No sign-up
- No watermark
- 20 languages
- AI-powered
Import. Generate. Export.
Create professional subtitles in three steps — fast enough for YouTube, TikTok, lessons, and podcasts.
2
Generate
Cloud AI transcribes speech, auto-detects the language, and times every caption — up to 60 minutes per generation.
3
Export
Fine-tune text and style, then export clean SRT or VTT files. Share, save, or email. No watermark, ever.
Everything you need in a subtitle maker
AI transcription, a full caption editor, translation, and offline tools.
AI subtitle generation
Turn speech into timed captions automatically. Auto-detect language, translate, or use Optimized Mode for higher accuracy.
Powerful subtitle editor
Fix a typo, shift every timestamp, or rearrange segments with an editor that protects unsaved changes.
Caption styling
Optional presets and custom colors, size, outline, and position — previewed live on your video.
Real-time video preview
Watch captions overlaid on your video before you export, so timing and readability are right on the first try.
SRT and VTT export
Export professional subtitle files for YouTube, Vimeo, social, or any editor. Styled exports keep your look intact.
Offline subtitle library
Every generation is saved automatically. Search, re-edit, and re-export without spending another credit — even offline.
Free subtitle merger
Combine 2–10 SRT or VTT files on a color-coded timeline. Adjust offsets, catch overlaps, and merge with zero credits.
Private from the first tap
No account, email, or password. Telemetry stays off until you opt in, and files are prepared locally on your device.
Multilingual by design
Transcribe and translate across 20 languages. The app itself follows your device language across 10 interfaces.
Transcription and translation
- English
- Chinese (Simplified)
- Chinese (Traditional)
- Hindi
- Spanish
- French
- Arabic
- Bengali
- Russian
- Portuguese
- Indonesian
- Urdu
- Japanese
- Swahili
- Marathi
- Telugu
- Tamil
- Vietnamese
- Korean
- Italian
App interface
- English
- Traditional Chinese
- Simplified Chinese
- Korean
- Hindi
- Spanish
- French
- Japanese
- Indonesian
- Portuguese (Brazil)
Free to start. No subscription.
New users get welcome credits. Returning users earn more with daily rewards and streaks. Top up only if you ever need extra — never a monthly fee.
- No sign-up required
- No watermark on exports
- Fast, accurate cloud AI generation
- Free rewards for returning users
Subtitle generator FAQ
Watermarks, accounts, formats, translation, and how the free credits work.
Does Subtitle Caption Studio add a watermark?
No. Every export is clean, with zero watermarks. Your content stays 100% yours.
Do I need an account to generate subtitles?
No. Open the app and start generating subtitles immediately — no email, password, or sign-up.
Which formats are supported?
Import MP4, MOV, WebM, MKV, MP3, M4A, WAV, FLAC, OPUS, and more. Export to SRT and VTT for YouTube, social platforms, and video editors.
Can it translate subtitles to another language?
Yes. Transcribe in one language and translate into another across 20 supported languages, with optional auto-detect.
Is the subtitle generator app free?
Yes. Start with free welcome credits, earn more through daily rewards and streaks, and only top up if you ever need more. There is no subscription.
How long can a video or audio file be?
Cloud AI generation supports files up to 60 minutes. Completed subtitles stay in your offline library so you can edit and re-export later.
Can I merge existing SRT or VTT files?
Yes. The free subtitle merger combines 2–10 files, lets you reorder them on a timeline, and warns you about overlaps. No credits and no internet required.
Turn any video or audio into subtitles
Download Subtitle Caption Studio and export clean SRT or VTT files today.