Free Online Subtitle Converter & Editor
Convert, sync, merge, and split subtitle files with our free online tools. Support for SRT, VTT, ASS formats. No download required - process subtitles directly in your browser with complete privacy protection.
🔒 100% Private - All processing happens in your browser
from 99+ happy users
Professional Subtitle Tools Suite
Everything you need for subtitle processing - convert formats, adjust timing, merge files, and split long subtitles. All tools work directly in your browser for maximum privacy.
Subtitle Converter
Convert between SRT, VTT, ASS, and SSA formats instantly. Perfect for video creators, translators, and content managers.
Subtitle Sync Tool
Fix subtitle timing issues by adjusting millisecond-precise offset. Sync subtitles with audio perfectly.
Subtitle Merger
Combine multiple subtitle files into one. Ideal for CD1+CD2 movies or multi-language subtitles.
Subtitle Splitter
Split long subtitle files by time intervals or number of segments. Perfect for TV series and long content.
Advanced Subtitle Processing Features
Professional-grade features for all your subtitle processing needs.
Format Conversion
Convert between SRT, VTT, ASS, SSA formats with perfect accuracy and formatting preservation.
Timing Synchronization
Adjust subtitle timing with millisecond precision to sync perfectly with audio and video.
File Merging
Combine multiple subtitle files while maintaining proper timing and format consistency.
Smart Splitting
Split long subtitle files by time intervals or segments with automatic timing adjustment.
Batch Operations
Process multiple files simultaneously to handle large subtitle processing jobs efficiently.
Privacy First
All processing happens in your browser. No file uploads to servers, complete privacy protection.
About Our Free Subtitle Tools
Professional Subtitle Processing
Our comprehensive subtitle tools suite provides everything you need for professional subtitle processing. Whether you're converting SRT to VTT for web players, syncing subtitles with audio, merging multiple subtitle files, or splitting long subtitles into segments, our browser-based tools deliver professional results instantly.
Built with modern web technologies including Next.js, React, and TypeScript, our tools process files locally in your browser. This means your subtitle files never leave your computer, ensuring complete privacy and security for your content.
Supported Subtitle Formats:
- SRT (SubRip) - Most popular subtitle format
- VTT (WebVTT) - Web standard for HTML5 video
- ASS (Advanced SubStation Alpha) - Advanced styling and effects
- SSA (SubStation Alpha) - Legacy format with styling support
Use Cases & Applications
Content Creators
YouTube creators, podcasters, and video producers use our tools to convert subtitles for different platforms, sync timing after editing, and create accessible content for global audiences.
Professional Translators
Freelance translators and localization teams rely on our format conversion tools to work with client files in any format and deliver in the required format while maintaining timing accuracy.
Educational Institutions
Schools, universities, and e-learning platforms use our tools to create accessible educational content, convert lecture subtitles for different learning management systems, and ensure compliance with accessibility standards.
Professional Subtitle Tools Showcase
From format conversion to timing synchronization, our tool suite covers all your subtitle processing needs.
Batch Processing
Process multiple subtitle files simultaneously. Dramatically improve efficiency for professional users.
- Multi-file processing
- Real-time progress
- Error handling
Privacy Protection
All processing happens locally in your browser. No file uploads, ensuring complete content confidentiality.
- Browser-based processing
- Zero file uploads
- Complete privacy protection
Trusted by Content Creators Worldwide
Join thousands of users who rely on our subtitle tools daily.
Files Processed
1M+
Subtitle Files
Supported Formats
10+
File Types
Processing Speed
<1s
Average Time
What Users Say About Our Subtitle Tools
Hear from content creators, translators, and media professionals who use our tools daily.
Sarah Chen
YouTube Content Creator
I've been using these subtitle tools for my YouTube channel for months. The SRT to VTT conversion is flawless, and the sync tool saved me hours when my subtitles were off by 2 seconds!
Michael Rodriguez
Professional Translator
As a freelance translator, I work with many subtitle formats. This tool suite handles everything I need - conversion, timing adjustment, and merging. The privacy aspect is crucial for client work.
Emily Johnson
Video Production Manager
Our team processes hundreds of subtitle files monthly. The batch conversion and splitting features are game-changers. No more manual work, everything is automated and accurate.
David Kim
Educational Content Creator
I create online courses and need subtitles in multiple formats. This tool converts my SRT files to VTT for web players and ASS for advanced styling. Perfect for e-learning platforms!
Lisa Wang
Film Subtitle Editor
Working on international films requires precise subtitle timing. The sync tool with millisecond adjustment is exactly what I needed. The merge feature helps with multi-part movies.
Alex Thompson
Streaming Platform Manager
We needed a reliable way to process subtitle files from different sources. These tools standardize everything perfectly. The format conversion maintains all styling and timing.
Frequently Asked Questions About Subtitle Tools
Common questions about subtitle conversion, editing, and our privacy-first approach.
What subtitle formats do you support for conversion?
We support the most popular subtitle formats including SRT (SubRip), VTT (WebVTT), ASS (Advanced SubStation Alpha), and SSA (SubStation Alpha). You can convert between any of these formats while preserving timing and styling information.
Is my subtitle data safe and private?
Absolutely! All subtitle processing happens entirely in your browser using JavaScript. Your files are never uploaded to our servers, ensuring complete privacy and security of your content. This is especially important for professional and confidential projects.
Can I process multiple subtitle files at once?
Yes! All our tools support batch processing. You can upload multiple subtitle files and process them simultaneously, which is perfect for handling large projects like TV series or course materials efficiently.
How accurate is the subtitle timing synchronization?
Our sync tool provides millisecond-level precision for timing adjustments. You can shift subtitles forward or backward by any amount, making it perfect for fixing audio-video sync issues or adapting subtitles for different video versions.
Do I need to install any software to use these tools?
No installation required! Our subtitle tools work directly in your web browser using modern web technologies. Simply visit our website, upload your files, and start processing immediately on any device.
Can I split long subtitle files for TV series or courses?
Yes! Our subtitle splitter can divide long subtitle files by time intervals (e.g., every 45 minutes for TV episodes) or by a specific number of segments. The tool automatically adjusts timing so each split file starts from 00:00:00.
Start Processing Your Subtitles Now
Join thousands of content creators using our free subtitle tools daily.