Permanently embed Portuguese 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 Portuguese 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 Portuguese 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.
Really fast to transcribe our audio files with high accuracy, we just had to correct some small words. I like the layout of the website, how pleasing to the eye and easy it is to edit your files, nothing was complicated and I wasn't ever 'stuck' on something and didn't know where to click etc, it was my first time ever using something like this and it was a breeze!
I tried a few transcription services and I found yours to be clearly superior. The results were more complete and accurate.
I found out out you guys because I had to do some transcribing for me yearbook class and my friend recommended you guys. It was a very easy process and it took hours off the time I had to a...
Your software is absolutely mind blowing. It is worth every penny!
The process was super easy. I liked that you can upload video file without stripping away the audio first to do it, this of course saves production time. Great job overall for sure!!!
Sonix is amazing. It’s like adding the most brilliant brain to my staff.
My first trial was a video interview with a woman with an Eastern European accent, and I thought there was no way your system would render a good transcription—but it was amazingly accurate...
Your UI and UX was one of the best I've seen. And I've seen a lot of them. Clean, simple, and pretty easy to edit.
Upload your video and get professional burned-in Portuguese subtitles. Start with 30 minutes minutes free—no credit card required.
AI transcription and translation in 53+ languages.
