Permanently embed Spanish subtitles directly into your video pixels. Burned-in captions display on any device or platform—perfect for Instagram, TikTok, LinkedIn, and social media.
Upload your video file from your computer, Dropbox, or Google Drive. Sonix supports MP4, MOV, AVI, and 40+ other video formats up to 4K.
Sonix AI automatically transcribes your Spanish video and generates perfectly-timed subtitles with speaker identification.
Review and polish your transcript in our browser-based editor. Correct any errors and adjust timing to ensure perfect synchronization.
Customize your subtitle appearance: font family, size, color, background, and position. Preview styles in real-time before rendering.
Sonix burns your Spanish subtitles directly into the video pixels. Processing time depends on video length and resolution.
Burn-in (hardcoded) subtitles are permanently embedded in the video pixels and cannot be turned off. Soft subtitles (SRT/VTT) are separate files that viewers can toggle on/off. Burn-in is ideal for social media where caption support is inconsistent.
Yes! Sonix offers extensive styling options including font family, size, color, background color, opacity, and position (top, middle, bottom). Preview your style in real-time before rendering.
Sonix preserves your original video quality during the burn-in process. We use high-quality rendering to ensure subtitles look crisp and professional without degrading your footage.
Processing time depends on video length and resolution. A typical 10-minute 1080p video takes about 5-10 minutes to render. You'll receive an email notification when your video is ready.
Sonix exports burned-in videos as MP4 files with H.264 encoding—the most universally compatible video format. Your video will play on virtually any device or platform.
No. Once subtitles are burned in, they're permanent. We recommend thoroughly reviewing and editing your transcript in the Sonix editor before rendering. You can always create a new burn-in version if needed.
Most social platforms auto-play videos without sound. Burn-in subtitles ensure your message is seen even on mute.
Burned-in subtitles display on any device, any player, anywhere—no caption support required.
Match your brand with custom fonts, colors, and styling that stays consistent across all platforms.
Unlike soft captions that can be hidden or unsupported, burn-in subtitles are always visible to every viewer.
Works very well with Arabic voices.
I love it! It basically nailed every word.
The transcription was fast and accurate.
What I loved about the transcription is that it is fast and it's also highly accurate.
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I love, love, love this service! Sonix is amazing! I plan to use the transcripts I've gotten so far to update the content of my podcast so that it will aid in SEO on my website. Ve...
I absolutely love what you guys have done with this. Sonix is literally a magical product that has helped me so much already and I will be using this for a long time coming.
Upload your video and get professional burned-in Spanish subtitles. Start with 30 minutes minutes free—no credit card required.
AI transcription and translation in 53+ languages.
