Auto-caption Welsh videos

Automatically add accurate captions to your Welsh 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
Welsh transcription guide

Auto-caption Welsh 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 Welsh videos.

  2. 2
    Upload your video~1 min

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

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

    Select Welsh 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 Welsh captions.

  6. 6
    Export captions~10 sec

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

    30+ export formats
The Welsh language

Understanding Welsh transcription

Who transcribes Welsh content?

Welsh-language broadcasters and podcast producers, Welsh Government bodies and local councils meeting bilingual service requirements, and universities researching Welsh-medium education regularly transcribe Welsh audio. Oral history projects and legal proceedings in Wales, where Welsh may be spoken in court, also generate Welsh recordings.

Welsh dialects and accents

The main spoken split is between northern and southern Welsh, which differ in vowel pronunciation and everyday vocabulary (for example, llefrith versus llaeth for milk). Colloquial speech also diverges noticeably from formal literary Welsh, and a small Patagonian Welsh community survives in Argentina.

Where Welsh is spoken

Welsh is spoken in Wales, and by some in England, Argentina, Canada, and America.

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

Frequently asked questions about
Welsh auto-captioning

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

Sonix uses cutting-edge transcription algorithms to caption your Welsh videos in minutes. Our servers can auto-caption a one-hour Welsh 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 Welsh 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 Welsh video?

Yes! From the Subtitles menu, you can choose to burn-in the Welsh captions directly into your video. This creates a new video file with permanent, embedded captions that display on any device.

How accurate are Welsh auto-captions?

Sonix delivers 85-99% accuracy for Welsh auto-captioning, depending on audio quality. Clear audio with minimal background noise achieves the best results. Our AI models are trained specifically for Welsh 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 Welsh 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 Welsh audio and video?

Yes. Upload your Welsh recording, select Welsh as the language, and Sonix generates a transcript you can edit in the browser and export to formats such as DOCX, PDF, and SRT.

Does Welsh transcription handle both north and south Wales accents?

Sonix transcribes Welsh spoken across regions, though vocabulary and pronunciation differ between northern and southern Welsh, so it is worth reviewing regional words in the built-in editor.

Can Sonix transcribe recordings that mix Welsh and English?

Each file is transcribed in one selected language, so choose the language that dominates the recording and correct mixed-language passages in the editor.

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