AI Subtitle
Upload a video, get subtitles automatically
Stop typing subtitles line by line. AI transcribes the audio, times it to the speech and translates it into several languages. You review it in the Subtitle Editor and publish.
- languages, including Thai
- 30+
- to start, pay as you go
- THB 2 / min
- words and sentences
- Unlimited
- subtitle upload and export
- .srt · .vtt
How it works
Add subtitles to your video in 4 steps
- 01
Upload your video
Upload the file to ByteArk Stream and let the system take it from there.
- 02
AI transcribes it
Speech-to-Text listens to the clip and writes the captions. No typing needed.
- 03
Review in the Subtitle Editor
Fix words, adjust text and time it to the speech on one screen.
- 04
Publish in many languages
Translate subtitles into several languages at once and publish worldwide.
Subtitle Editor
AI drafts subtitles, you refine them
Every line the AI writes is editable. Adjust text, shift timing and filter words you don't want on screen before you publish.
- Edit text and timing on one screen
- Set a Bad Word List to filter banned words from auto-generated subtitles
- Upload existing subtitles, or attach several files in several languages per video (.srt, .vtt)
Features
More than transcription
Automatic subtitles
Speech-to-Text turns audio into captions. Hours of typing become a few clicks.
Translate into many languages
Translate existing subtitles into several languages at once and reach international viewers.
Edit and re-time
Adjust text and sync timing to the speech yourself in the Subtitle Editor.
Banned-word filter
Set a Bad Word List in advance and the system strips those words from AI-generated subtitles.
Upload and export subtitle files
Supports .srt and .vtt, with several files in several languages per video.
Accessible and searchable
Viewers watching without sound and people with hearing loss can follow along, and your content is easier to find.
Thai language
ByteArk AI understands Thai
More accurate word breaks, sentence segmentation, tone marks and Thai proper nouns than the general tools we tested.
| Criteria | Kapwing | CapCut AI | ByteArk AI |
|---|---|---|---|
| Timing and word breaks | Poor | Sentences overflow the line | Good word breaks, context-aware |
| Translation accuracy | Some text distorted | Fairly frequent errors | Accurate, incl. Thai proper nouns |
| Thai tone marks | Some text distorted | — | No issues |
| Thai proper-noun spelling | Highly inaccurate | — | Accurate |
| Subtitle segmentation | — | Not good enough yet | Well handled |
Timing and word breaks
ByteArk AI: Good word breaks, context-aware
- Kapwing
- Poor
- CapCut AI
- Sentences overflow the line
Translation accuracy
ByteArk AI: Accurate, incl. Thai proper nouns
- Kapwing
- Some text distorted
- CapCut AI
- Fairly frequent errors
Thai tone marks
ByteArk AI: No issues
- Kapwing
- Some text distorted
- CapCut AI
- —
Thai proper-noun spelling
ByteArk AI: Accurate
- Kapwing
- Highly inaccurate
- CapCut AI
- —
Subtitle segmentation
ByteArk AI: Well handled
- Kapwing
- —
- CapCut AI
- Not good enough yet
Why subtitles matter
Subtitles bring more viewers
Clear even on mute
People with hearing loss, commuters, or anyone watching in a meeting can follow everything.
Cross the language barrier
Subtitles in several languages take Thai content to international viewers without a reshoot.
Let Google read your video
Subtitle text makes video searchable, helps SEO and lets viewers jump to the part they want.
Who it's for
Works for many kinds of content
Education
Subtitle lessons and online courses so learners review and follow more easily.
Media and newsrooms
Transcribe news, interviews and documentaries automatically, cutting subtitling time and cost.
Marketing and social
Promo clips have subtitles from the first second, so viewers scrolling without sound can understand the message.
Enterprise
Turn meetings, training and internal videos into text you can search later.
Pricing
Pay as you go, or buy an annual package
Billed by video length, with unlimited words and sentences in 30+ languages.
Pay per use
Start now. No minimum, unlimited words.
THB 2 / min
Starter
฿114,000
≈ ฿9,500 / month
- 60,000 min
- Free bonus +5% (+3,000 min)
- Avg 1.81 THB / min
Standard
Popular฿327,000
≈ ฿27,250 / month
- 180,000 min
- Free bonus +10% (+18,000 min)
- Avg 1.65 THB / min
Pro
฿845,000
≈ ฿70,417 / month
- 480,000 min
- Free bonus +10% (+48,000 min)
- Avg 1.60 THB / min
Overage billed at THB 2/min · package minutes valid for 12 months (no rollover) · prices exclude 7% VAT
Subtitle every video, starting today
Create AI captions on ByteArk Stream and let your content reach more people.