Burn Subtitles into Video Online Free
Already have an .SRT, .VTT, or .ASS file? Upload your video and subtitle file to sync, apply viral TikTok/Hormozi animations, and export a high-resolution hardcoded MP4 with zero watermarks.
Upload Video & Subtitle File
Have a video file? Upload your video and subtitle file to sync, style, and burn them into high-res MP4 with zero watermark.
Don't have subtitles yet? Cloudflare Whisper AI can automatically extract and generate timestamped subtitles from your video audio.
🎙️ AI Auto-Caption (Video/Audio)
Supports MP4, MOV, WEBM, MP3, WAV, M4A · 100% Client-Side Privacy
Paste Your Script or Lyrics
Our smart auto-segmentation algorithm breaks your text into optimal caption lengths and calculates exact timestamps.
Live Subtitle & Video Preview
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Upload Video & Subtitles
Drop your MP4, MOV, or WebM video along with your .SRT, .VTT, or .ASS subtitle file. Both stay 100% on your local device.
Customize Style & Sync
Choose from trending viral animations (Hormozi, MrBeast, Neon Glow), adjust safe zone margins, and fix any millisecond timing offsets.
Export Hardcoded MP4
Click 'Export Video' to render your subtitled video right in your browser. Download watermark-free at full resolution.
Why Creators Choose FreeAutoCaption
The complete subtitle workflow: upload subtitles to burn, or generate new ones with AI.
AI Word-Level Precision
Cloudflare Workers AI Whisper transcription matches speech word-by-word across 100+ languages.
Viral Hormozi & Beast Styles
Boost retention by up to 80% with animated word-by-word highlights, bold punch fonts, and colorful glows.
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Multi-Format Subtitle Suite
Convert and export cleanly between SRT, VTT, ASS, JSON, and TXT with full timing fidelity.
Universal Subtitle Video Burner
Already have an SRT, VTT, or ASS file? Upload it with your video to hardcode styled animated captions with zero lag.
100% Free · No Watermark
No subscriptions, no hidden limits, and no watermark on your exported videos.
FreeAutoCaption vs Caption X & Competitors
See how FreeAutoCaption delivers professional features without paywalls or watermarks.
| Feature | FreeAutoCaption.com | Caption X | CapCut Pro | Kapwing |
|---|---|---|---|---|
| 100% Free Forever | ✓ | Paid Tier for Pro | Paid Pro | Watermarked |
| No Watermark on Video Exports | ✓ | Watermark on Free | ✕ | ✕ |
| Upload Existing Subtitles (.SRT/.VTT/.ASS) | ✓ | ✓ | ✕ | ✕ |
| Subtitles Word-by-Word Animation | ✓ | ✓ | ✓ | Paid Only |
| Social Media Safe Zone Overlays | ✓ | ✕ | ✕ | ✕ |
| In-Browser Privacy & Speed | ✓ | Cloud Audio Upload | App Install | Cloud Queue |
| Free Subtitle File Downloads (.SRT, .VTT, .ASS) | ✓ | ✓ | SRT Only | Paid Only |
Frequently Asked Questions
Everything you need to know about generating, styling, and exporting subtitles for free.
Is Subtitle Generator Free completely free to use?+
Yes, 100% free with no hidden paywalls, no credit card requirements, and no watermarks on your videos or subtitle files.
How do I generate subtitles from an existing script or text?+
Simply click the "Script to Subtitles" tab in our studio, paste your raw transcript or lyrics, adjust your preferred reading speed (WPM), and click "Auto-Generate Subtitle Cues". Our algorithm will segment the sentences into optimal lines and calculate exact timestamps automatically.
Can I burn the animated subtitles directly into my video file?+
Yes! In the Live Video Studio tab, you can customize the caption animations, positions, and fonts, then click "Export Video (Burn-In Subtitles)" to render and download your video with hardcoded subtitles directly in your browser.
What subtitle export formats are supported?+
You can export industry-standard .SRT (SubRip) files, .VTT (WebVTT) files for web players, and .TXT plaintext transcripts, as well as copy timestamped cues directly to your clipboard in one click.
Is my audio and video data kept private and secure?+
Absolutely. Subtitle Generator Free operates client-side inside your browser sandbox. Your media files and scripts are processed locally and are never stored or uploaded to third-party databases.
What video aspect ratios are supported for social media?+
Our studio supports 9:16 vertical (TikTok, Instagram Reels, YouTube Shorts), 16:9 widescreen (YouTube, TV, Presentations), and 1:1 square (Instagram feed, LinkedIn, Facebook).