Automatically add accurate captions to your English videos in less than 5 minutes. Sonix extracts speech, generates perfectly-timed captions, and exports to SRT or VTT format.
Log in to your Sonix account or create a free trial account. Your trial includes 30 minutes minutes of free auto-captioning for English videos.
Click 'Upload' and choose the English video file from your computer that you want auto-captioned. Sonix supports 40+ video formats including MP4, MOV, and AVI.
Make sure you select English as the language spoken before clicking the 'Transcribe' button. Our AI will extract and transcribe all speech from your video.
Once transcribed, go to the Subtitles menu and select 'Split subtitles.' Sonix automatically splits your transcript into properly-timed caption segments.
Review and correct any proper nouns or technical terms. Use our editor to fine-tune timing and make your English captions perfect.
Click 'Export' and choose SRT or VTT format for your English captions. Ready for YouTube, Vimeo, Facebook, or any video platform.
Sonix uses cutting-edge transcription algorithms to caption your English videos in minutes. Our servers can auto-caption a one-hour English video in under 5 minutes. You can then edit and fine-tune using our powerful subtitle editor.
Sonix exports English captions in two industry-standard formats: SubRip (.srt) and WebVTT (.vtt). Both formats are compatible with YouTube, Vimeo, Facebook, and virtually all video platforms and players.
Yes! From the Subtitles menu, you can choose to burn-in the English captions directly into your video. This creates a new video file with permanent, embedded captions that display on any device.
Sonix delivers 85-99% accuracy for English auto-captioning, depending on audio quality. Clear audio with minimal background noise achieves the best results. Our AI models are trained specifically for English speech patterns.
Yes. Sonix lets you customize font size, font color, background color, and caption positioning. These styling options are preserved when you burn captions into your video.
Absolutely. Export your English captions as an SRT or VTT file and upload directly to YouTube. Your captions will sync perfectly with your video's audio.
Get your English video captioned in minutes, not hours. Our AI processes at 10x real-time speed.
Export to SRT, VTT, or burn captions directly into your video. Compatible with all major platforms.
Fine-tune timing and text with our intuitive subtitle editor. Click any caption to jump to that moment.
Upload MP4, MOV, AVI, MKV, WebM, and 40+ other video formats. No conversion needed.
You guys are the best...hands down!
I love it! It basically nailed every word.
The level of accuracy and your UI is quite amazing. It allowed me to try the product without having to learn anything new, I was so happy about it I sent the results to a couple of...
English dictation is very accurate. And the online editor is easy to use. Also it generates SRT files that I can import in my video editors for further processing.
Unbelievable! Wow, it's amazing. Really amazing. I didn't believe it so I wanna test something and I got actually result I wanted. Amazing!
I'm very happy with the experience. The Spanish translations are superb. I'm in awe!
I love how easy it is – it saves me so much time transcribing – I can just pull out the main points of interest from the transcription.
Impressed at how seamless Sonix makes editing transcripts. This is so much easier and more enjoyable than manually writing an entire transcript myself.
Upload your English video and get perfectly-timed captions in minutes. Start with 30 minutes minutes free—no credit card required.
AI transcription and translation in 53+ languages.
