Trusted by 100,000+ users worldwide
Add subtitles to video instantly
Automatically add subtitles to video using advanced AI speech-to-text technology. Generate accurate captions, edit them easily, and export subtitles in multiple formats- all in one powerful platform.
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Accepted formats: MP4, MOV, AVI, MKV, WebM · Max 500MB
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Add subtitles in seconds
100+ languages supported
+ 50M
Subtitles
Generated
100K +
users
95% +
Accuracy
rate
100 +
supported
How to add subtitles to video
Follow three simple steps to generate automatic subtitles, create captions, and export your video with SRT files
1. Upload Your Video
Upload your video file or paste a link from YouTube, Google Drive, or other platforms
2. Generate subtitles with AI
Our AI subtitles generator creates accurate auto captions using speech recognition in seconds
3. Edit and export subtitles
Edit timing, text, and styles using our subtitle editor. Export as SRT, VTT, or burn subtitles directly into your video
Add subtitles to video in all major formats
Our AI subtitle generator supports all popular video formats, making it easy to add subtitles t o video online and export captions for editing, sharing, or publishing.
MP4
Most common video format, widely supported across all devices and platforms
MOV
Apple’s QuickTime format, perfect for Mac users and professional editing
AVI
Classic video format with excellent quality and wide compatibility
MKV
Open-source container format supporting multiple audio and subtitle tracks
WebM
Web-optimized format designed for HTML5 video streaming
FLV
Flash video format, commonly used for online video content
And many more formats including WMV, MPEG, 3GP, and custom formats.
Why choose Summary Ai to subtitle your video content?
Automatically generate video subtitles, auto captions, and closed captions to make your content accessible and easier to understand
Automatic subtitles
AI-powered transcription generates accurate subtitles in seconds
Supports 100+ languages
Reach global audiences with multilingual subtitle support
All video formats
Supports MP4, MOV, AVI, MKV, WebM and more
Secure processing
Your videos are encrypted and never shared with third parties
Accurate auto subtitles with advanced AI speech-to-text
Our AI subtitle generator uses advanced speech-to-text technology to convert audio into accurate subtitles, captions, and synced transcripts.
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Automatic speaker detection
Detects speakers and dialogue automatically -
Smart punctuation
Smart punctuation and formatting -
Time-synced subtitles
Time-synced subtitles with your video
Add captions to video and improve engagement
Adding subtitles and closed captions helps viewers understand your content, improves retention, and makes videos easier to discover
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Improve video engagement
Videos with subtitles keep viewers watching longer and increase overall watch time -
Make content accessible
Reach a wider audience, including viewers who prefer watching without sound or rely on closed captions -
Boost SEO with transcripts
Search engines can index subtitle text and transcripts, helping your video rank higher -
Reach global audiences
Translate subtitles into multiple languages and expand your content worldwide
Customize subtitle styles and formatting
Create subtitles that match your brand using our flexible subtitle editor.
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Multiple font options
Choose from popular fonts like Arial, Roboto, Open Sans, and more -
Custom colors & backgrounds
Style your subtitles with custom colors or transparent backgrounds for better visibility -
Position & alignment
Place subtitles at the top, bottom, or center with flexible alignment options
Perfect for creators, teams, and businesses
Trusted by professionals across industries
Content creators
YouTubers, TikTokers, and social media creators use subtitles to increase engagement and reach wider audiences
Marketers
Marketing teams add captions to video ads, product demos, and social content to maximize impact
Educators
Teachers and trainers make educational videos accessible to all students with accurate subtitles
Trusted by creators worldwide
Thousands of users rely on Summary AI to generate subtitles automatically, convert audio to text, and improve their video content.
“This tool saved me hours of work. The auto subtitles are incredibly accurate, and the editor makes it easy to fine-tune everything.”
SM
Sarah Miller
YouTube Creator
“This AI audio summarizer is a game changer for meetings. I get clear summaries and action items instantly.”
JC
James Chen
Marketing Director
“Fast and accurate. I turn long audio files into summaries in minutes and reuse them for content.”
EP
Emily Parker
Online Educator
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Add subtitles to video FAQs
Common questions about our subtitle generator
Is the subtitle generator free to use?
Summary AI offers a free plan or trial to add subtitles to video online. Paid plans unlock more transcription minutes, faster processing, and advanced features like subtitle customization and exports.
Can I edit subtitles online after they’re generated?
Yes. You can easily edit your auto captions using our built-in subtitle editor. Adjust text, timing, formatting, and styling to match your video content.
What if my subtitles are out of sync with the video?
No problem. Summary AI allows you to quickly fix timing issues using our editor. You can adjust timestamps, sync subtitles with your video, and ensure accurate time-coded captions.
Can I translate the subtitles automatically?
Yes. Our AI subtitle generator supports multiple languages, allowing you to translate subtitles automatically and reach a global audience with your video content.
What’s the difference between subtitles and captions?
Subtitles typically display spoken dialogue, while captions include additional information like sound effects and speaker identification. Summary AI supports both, making your videos more accessible and engaging.
What are hardcoded subtitles and how do I export them?
Hardcoded (burned-in) subtitles are permanently embedded into your video. With Summary AI, you can export subtitles as SRT/VTT files or choose to embed subtitles directly into your video for easy sharing on platforms like YouTube and TikTok.
Add subtitles to video free in seconds
Generate accurate subtitles with AI and make your content accessible instantly
No signup required · Fast AI subtitles · 100+ languages
