Works everywhere
Your subtitles stay visible even when platforms ignore or strip subtitle tracks.
🎬 HARDCODED MP4 · AI SUBTITLE STUDIO
Burn Subtitles into Video Automatically
Need a final MP4 with subtitles already embedded? Generate AI captions, refine timing and style, and export hardcoded subtitles that look perfect on every platform — no extra subtitle files required.
- Reliable playback on every player
- Perfect for Shorts, Reels & TikTok
- Brand fonts, colors & presets
✅ Hardcoded + SRT/ASS from one project
📱 Optimized for mobile readability
🧩 Speaker styling supported
“Cleanest client delivery” — One MP4, no subtitle confusion.
“Perfect for Shorts” — Consistent captions across platforms.
“Finally a real subtitle studio” — Styling + timing in one place.
Why hardcoded subtitles are worth it
Hardcoded subtitles (burned-in captions) are ideal when you want guaranteed readability, consistent styling, and platform-proof results. They solve the most common pain of external subtitle files: unpredictable rendering.
Brand-safe styling
Lock fonts, colors and placement so your caption look never changes across devices.
Best for vertical video
Short-form content benefits most from crisp, high-contrast burned-in subtitles.
STUDIO TOUR
See the hardcoded workflow inside the studio
Real screenshots from the Subvideo.ai studio. See how you generate AI subtitles, refine timing and export a hardcoded MP4 in minutes.
Screenshot 1
AI subtitle editor & timing
Review auto-generated captions, refine line breaks and adjust timing directly in the studio timeline.
Screenshot 2
Speaker styling & presets
Apply clean, mobile-first subtitle styles with fonts, colors, backgrounds and speaker templates.
Screenshot 3
Hardcoded MP4 export
Choose burned-in export for platform-proof playback, and optionally download SRT/ASS as well.
Try the hardcoded workflow now
No account needed to test in guest mode.
How to burn subtitles into MP4 with AI
A simple 3-step path from raw video to a finished, platform-proof MP4 with burned-in subtitles.
1 Upload
Upload your video
Drag & drop your MP4 (or other supported formats). The AI generates time-coded subtitles automatically.
2 Edit
Edit timing & style
Refine text, improve readability, assign speakers and apply clean style presets for mobile-first viewing.
3 Export
Export hardcoded MP4
Select the burned-in export and download a ready-to-publish MP4.
Hardcoded vs. soft subtitles
Both formats are useful. Subvideo.ai lets you export burned-in MP4 and also SRT/ASS when you need editable tracks.
Hardcoded (burned-in)
- Always visible
- Works on every player
- Best for Shorts, Reels, TikTok
- Brand styling stays intact
Soft subtitles (SRT/ASS)
- Viewer can toggle on/off
- Easy to update without re-rendering
- Best for long-form YouTube
- Great for multi-language tracks
Free preview → Ultimate for high-quality hardcoded export
Start in guest mode and test the workflow quickly. Upgrade only when you need higher export quality, faster processing, or advanced styling for client-ready delivery.
Try first
Check the workflow in minutes
Upload, generate subtitles, preview the style and see how your hardcoded result will look.
Guest mode available
No install required
Upgrade only if needed
Ultimate for serious publishing
Ideal for branded content, agencies, and creators who need polished, high-quality exports.
High-quality exports
Advanced presets & styles
Try it with your video
Upload your video and let AI generate subtitles automatically. You will be redirected to the editor as soon as processing is done.
Hosted in the EU – GDPR-compliant 
Secure 256-bit encryption 
No account needed to start Export a platform-proof MP4 with subtitles
Stop relying on inconsistent subtitle support. Generate AI captions, refine your style, and export hardcoded subtitles for reliable playback across every platform.
Burn subtitles into my video
No account needed to try – limited free minutes in guest mode.
Hardcoded subtitles – FAQ
Quick answers about burned-in MP4 exports, vertical content and combining hardcoded with SRT/ASS.
Can I burn subtitles into vertical videos?
Yes. Hardcoded subtitles are ideal for Shorts, Reels and TikTok where mobile readability matters most.
Do I need an SRT file first?
No. Subvideo.ai generates subtitles automatically. You can also import an existing SRT.
Can I export both hardcoded and SRT/ASS?
Absolutely. Many creators hardcode for social clips and keep SRT/ASS for long-form or multilingual publishing.