Auto-caption English videos

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.

Free to start — no credit card required.See pricing

5-minute processing
SRT & VTT export
YouTube compatible
English transcription guide

Auto-caption English videos
in 6 easy steps

  1. 1
    Sign in to Sonix~30 sec

    Log in or start a free trial with 30 minutes of auto-captioning for English videos.

  2. 2
    Upload your video~1 min

    Click 'Upload' and choose the English video file you want auto-captioned.

    50+ formats supported
  3. 3
    Select language~5 min

    Select English as the language spoken, then click 'Transcribe' to extract all speech from your video.

    Word-level timestamps
  4. 4
    Split into captions~1 min

    Open the Subtitles menu and select 'Split subtitles' to break your transcript into timed caption segments.

  5. 5
    Polish your captions~2 min

    Correct proper nouns and technical terms, then fine-tune the timing of your English captions.

  6. 6
    Export captions~10 sec

    Click 'Export' and choose SRT or VTT for your English captions, ready for any video platform.

    30+ export formats
The English language

Understanding English transcription

Who transcribes English content?

English is the default working language for podcasters, journalists, market researchers, courts, and universities across the United States, the United Kingdom, Canada, Australia, and dozens of other countries. Corporate teams also transcribe English meetings, webinars, and earnings calls to create searchable records and captions.

English dialects and accents

English spans many regional varieties, including American, British, Australian, Irish, Canadian, Caribbean, Indian, and Nigerian English, each with distinct pronunciation, vocabulary, and rhythm. Non-rhotic accents (many British and Australian varieties drop the "r" after vowels, as in "car" or "letter") and vowel shifts across regions are the variations most likely to affect speech recognition.

Where English is spoken

English is spoken in Antigua and Barbuda, Australia, The Bahamas, Barbados, Belize, Canada, Dominica, Grenada, Guyana, Ireland, Jamaica, New Zealand, St Kitts and Nevis, St Lucia, St Vincent and the Grenadines, Trinidad and Tobago, United Kingdom, United States of America.

5min
Caption generation
1-hour English video captioned in ~5 minutes
99%
Caption accuracy
Industry-leading English speech recognition
40+
Video formats supported
MP4, MOV, AVI, MKV, WebM, and more
SRT/VTT
Caption export formats
YouTube, Vimeo, Facebook compatible
English transcription FAQ

Frequently asked questions about
English auto-captioning

How long does it take to auto-caption English videos?

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.

What caption file formats does Sonix export?

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.

Can I burn captions directly into my English video?

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.

How accurate are English auto-captions?

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.

Can I customize caption styling?

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.

Do auto-captions work with YouTube?

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.

Can Sonix transcribe British and Australian English as well as American English?

Yes. Sonix transcribes English recordings from any region, including British, Australian, Irish, Canadian, and Caribbean accents. Upload your file, review the transcript in the in-browser editor, and export it in your preferred format.

Does English transcription handle recordings with multiple accents?

Yes. A single English recording can include speakers with different regional accents, and Sonix transcribes them in one pass. Speaker labels help you attribute lines to each participant while you edit.

Can Sonix transcribe English audio with heavy background noise?

Sonix can transcribe noisy English audio, but cleaner recordings produce better results. Recordings with background noise, low volume, or crosstalk typically need more correction in the editor.

Transcription software reviews

Trusted by professionals worldwide

4.98 rating from 211 reviews

99% accuracy. Every word matters.

AI transcription and translation in 54+ languages.

30 minutes free
No credit card
Cancel anytime