Accessibility
Reach viewers watching with the sound off, in noisy environments, or who are deaf or hard of hearing. Captions make your content easy to understand.
AI Auto Captions
AI-generated Subtitles in 36 languages.100% on-device. Free.
KineMaster automatically transcribes spoken audio from your video or audio track into editable caption layers. All processing runs locally on your phone or tablet — nothing is uploaded. Works offline.
- 36 languages supported
- Runs 100% on-device. Your video or audio stays on your phone or tablet.
- Free for all users
What it does
On-device AI captioning in 36 languages
Auto Captions uses on-device AI to transcribe the singing or narration in your video or audio track and creates synchronized caption layers on your timeline. Caption layers are batch-editable, formattable, and movable.
- 36 languages supported
- Runs 100% on-device. Your videos and images are not uploaded anywhere
- Works offline
- Free for all users
supportedlanguages
Download the language pack that matches your audio and generate captions entirely on-device.
- English
- Korean
- Hindi
- Portuguese
- Spanish
- Arabic
- Indonesian
- Thai
- Japanese
- French
- German
- Italian
- Vietnamese
- Russian
- Turkish
- Malay
- Polish
- Welsh
- Ukrainian
- Afrikaans
- Azerbaijani
- Basque
- Bengali
- Bulgarian
- Catalan
- Czech
- Danish
- Dutch
- Finnish
- Greek
- Latvian
- Macedonian
- Slovak
- Slovenian
- Urdu
- Galician
Each language asset is approximately 400–450 MB. Can be used offline after downloading.
How to use
How to add Auto Captions
Five steps from raw footage to synchronized caption layers.
- Step 1
Open Auto Captions
Open your KineMaster project. To caption the entire project, tap the AI button on the horizontal toolbar. To caption a single track, select the video or audio track that contains the spoken audio.
- Step 2
Tap Auto Captions
Tap Auto Captions in the Tool Panel.
- Step 3
Download language asset
Select the language that matches your audio and tap Download.
~400–450 MB per language - Step 4
AI processes locally
AI processes your audio entirely on your device. Nothing is uploaded. Processing speed depends on device performance. Requires at least 4GB of RAM on device.
- Step 5
Edit and style
Caption layers appear on your timeline as individual text layers. Tap any caption to edit text, font, color, size, or position.
Use cases
Two ways creators use Auto Captions
From accessibility to Reels retention, captions can open your content to more viewers.
Shorts & Reels retention
Styled captions hold attention through slow moments and boost watch-time on short-form platforms where most users scroll with content on mute.
FAQ
Frequently asked questions
Quick answers about pricing, offline use, language assets, device compatibility, and caption styling.
Are Auto Captions free?
Yes. Auto Captions is free for all KineMaster users. There is no subscription required.
How many languages do Auto Captions support?
36 languages, including English, Korean, Hindi, Portuguese, Spanish, Arabic, Indonesian, Thai, Japanese, French, German, and more. Each language is downloaded as a separate asset.
Do Auto Captions work offline?
Yes. After downloading the language asset, Auto Captions run 100% on-device. No internet connection is required during generation, and your media is never uploaded anywhere.
How large is each language asset?
Approximately 400 to 450 MB per language. Download each asset once; after that, you can use it every time you caption content in that language.
Can I export captions as an .srt file?
Exporting captions as a separate .srt file is not supported. Captions are burned into the final, saved video. However, you can import an existing .srt file into KineMaster.
Can I style captions (font, color, size)?
Yes! Caption layers can be batch edited to change the font, color, size, and position.
Does Auto Captions work with songs?
Auto Captions is optimized for spoken language. It may produce errors when generating subtitles for songs. Caption layers are easy to edit with the Text Input tool after generation, however.
Which devices support Auto Captions?
Auto Captions works on all iOS devices running KineMaster and Android devices with 4 GB or more of RAM. It has been available since KineMaster version 6.4.
Why are my captions taking a long time to generate?
Auto Captions rely on your phone or tablet's processor to generate. Longer clips and older devices take more time.
If I change a caption's color, does it affect every other caption?
Caption layer tools like Transform, Color, Glow, and Drop Shadow apply to all caption layers at once.
Related features
Use Auto Captions with these other tools
Combine Auto Captions with other KineMaster features to take your editing to the next level.
Caption any video —free, offline,
in 36 languages.
Download KineMaster free on iOS and Android.
