Subtitle Format Converter
Convert SRT to VTT, ASS to SRT, and more - free subtitle converter with 100% client-side processing
Drop subtitle files here
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Supports: SRT, VTT, ASS, SBV, TXT
Converted Output
Upload and convert a file to see the output
Subtitle Format Comparison
Most widely supported format
- Numbered entries
- Simple timing format
- Basic text
HTML5 video standard
- Web-native format
- CSS styling support
- Cue settings
Advanced styling and effects
- Rich text formatting
- Positioning control
- Animation effects
YouTube's native format
- Simple format
- YouTube compatible
- Easy editing
Text only, no timing
- No timing data
- Easy to read
- Manual timing needed
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100% Private & Secure
All subtitle conversion happens directly in your browser. Your subtitle files never leave your device, ensuring complete privacy when you convert subtitles between formats.
Instant Subtitle Conversion
No uploads, no server processing, no waiting. Our subtitle converter works in real-time, delivering converted subtitle files the moment you click convert.
Batch Subtitle Processing
Convert multiple subtitle files at once with our batch processing feature. Upload several SRT, VTT, or ASS files and download all converted subtitles in one click.
All Major Formats Supported
Our subtitle format converter supports SRT, VTT, ASS, SBV, and TXT. Whether you need SRT to VTT conversion or ASS to SRT, every popular subtitle format is covered.
No Registration Required
Use our free subtitle converter without creating an account. No sign-up, no email verification, no hidden fees. Just open the page and start converting subtitles immediately.
Preserves Timing & Formatting
Our subtitle conversion tool accurately preserves all timing data, cue positions, and text formatting during conversion. Your converted subtitles will sync perfectly with your video.
Free Online Subtitle Converter
Our free subtitle converter makes it effortless to convert subtitles between all major formats including SRT, VTT, ASS, SBV, and TXT. Whether you are a video editor preparing content for multiple platforms, a translator working with international subtitle files, or a content creator who needs to convert subtitles for web distribution, our subtitle format converter handles every scenario with precision. The entire subtitle conversion process runs locally in your browser, which means your files remain completely private. There is no server upload, no file size limit, and no waiting in a queue. Simply drop your subtitle file, select the target format, and download the converted result in seconds. This free subtitle converter supports batch processing, so you can convert dozens of subtitle files at once without any restrictions.
How to Convert Subtitles Step by Step
Using our subtitle converter is straightforward and requires no technical knowledge. First, drag and drop your subtitle file into the upload zone, or click to browse your file system. The subtitle format converter automatically detects whether your file is SRT, VTT, ASS, SBV, or TXT format. Next, select your desired target format from the dropdown menu. For example, choose VTT if you need SRT to VTT conversion for HTML5 video players, or select SRT if you need ASS to SRT conversion for broader compatibility. Click the Convert Selected button and your converted subtitle appears instantly in the output preview. From there, you can copy the text directly to your clipboard or download the file. For multiple files, use the Download All button to batch convert subtitles in one click.
SRT to VTT Conversion Explained
SRT to VTT is one of the most common subtitle conversion tasks, especially for web developers and content creators publishing video online. The SRT format, while universally supported by desktop media players, is not natively compatible with the HTML5 video element. WebVTT (VTT) was specifically designed as the subtitle standard for web browsers. Our SRT to VTT converter handles this transformation automatically, converting the SRT timestamp format to VTT's format, adding the required WEBVTT header, and preserving all subtitle text and timing data. The result is a standards-compliant VTT file that works seamlessly with any modern web browser's video player, including Chrome, Firefox, Safari, and Edge.
ASS to SRT and Advanced Format Conversion
Advanced SubStation Alpha (ASS) is a feature-rich subtitle format popular in anime fansub communities and advanced video editing workflows. ASS files contain detailed styling information including fonts, colors, positioning, and animation effects. When converting ASS to SRT with our subtitle converter, the tool intelligently extracts the dialogue text and timing from the ASS format while stripping the styling metadata that SRT does not support. This produces clean, accurate SRT files that maintain perfect synchronization with the original video. If you need to go the other direction, our SRT converter can also transform simple SRT files into properly structured ASS format, ready for further styling in subtitle editing software.
Subtitle Converter for YouTube and Streaming Platforms
Different video platforms require different subtitle formats, which is why a reliable subtitle conversion tool is essential for content creators. YouTube uses the SBV format natively but also accepts SRT uploads. Netflix and most streaming platforms prefer SRT or VTT with specific formatting requirements. Our subtitle format converter bridges these platform differences by allowing you to quickly convert between any supported format. If you have downloaded subtitles from YouTube in SBV format and need them in SRT for your video editor, or if you need to convert SRT files to VTT for your website's video player, our free subtitle converter handles both tasks instantly with zero quality loss in timing or text accuracy.
Why Choose a Client-Side Subtitle Converter
Privacy and speed are the two biggest advantages of a client-side subtitle conversion tool. Unlike server-based converters that require uploading your files to a remote server, our subtitle converter processes everything directly in your web browser using JavaScript. This means your subtitle files never leave your computer, making it ideal for converting confidential or proprietary subtitle content. Client-side processing also eliminates upload and download wait times, resulting in near-instant subtitle conversion regardless of your internet speed. There are no file size limits, no daily conversion caps, and no account creation required. Our free subtitle converter is always available, always fast, and always private.
Batch Subtitle Conversion for Professionals
Professional subtitle workflows often involve converting large numbers of files simultaneously. Our subtitle converter's batch processing feature lets you upload multiple subtitle files at once and convert them all to your target format in a single operation. This is particularly useful for localization teams working with subtitles in multiple languages, video production studios preparing deliverables for different platforms, and archivists converting legacy subtitle formats to modern standards. Simply select all the subtitle files you need to convert, choose the target format, and click Download All. The subtitle format converter processes each file individually while maintaining the original filenames, making it easy to organize your converted subtitle files.
Supported Subtitle Formats and Their Use Cases
Understanding when to use each subtitle format helps you choose the right output for your needs. SRT (SubRip) is the universal standard accepted by virtually every media player and video platform, making it the safest choice for general compatibility. VTT (WebVTT) is required for HTML5 web video and supports CSS styling and positioning. ASS (Advanced SubStation Alpha) offers the richest formatting options with fonts, colors, animations, and precise screen positioning, ideal for creative subtitle work. SBV is YouTube's native format, simple and optimized for the platform's subtitle system. TXT (Plain Text) extracts just the dialogue text without any timing, useful for creating transcripts or reviewing subtitle content. Our subtitle converter supports all five formats with accurate bidirectional conversion between any pair.