Is this SRT to VTT converter free?

Yes, completely free with no sign-up, no watermarks, no file size limits, and no daily caps. All processing happens in your browser.

Does the converter handle SRT files with BOM?

Yes. Some SRT files begin with a Byte Order Mark (BOM), especially those created on Windows. The converter detects and handles BOM correctly, ensuring it does not appear in the VTT output before the WEBVTT header.

Can I use the VTT with Video.js or Plyr?

Yes. The VTT output is compatible with all JavaScript video players that use the HTML5 element, including Video.js, Plyr, JW Player, Shaka Player, and MediaElement.js.

What MIME type should I use for VTT files?

Web servers should serve VTT files with the MIME type text/vtt. If served as text/plain, some browsers may reject them. If you are using Apache, add AddType text/vtt .vtt to your .htaccess. For Nginx, add the type to your mime.types configuration.

Does the converter support SRT styling tags?

SRT does not have a standardized styling specification, but some files include HTML-like tags such as , , or . The converter preserves these tags in the VTT output. VTT supports a subset of HTML inline tags ( , , ) which most browsers render.

Can I convert SRT to VTT on mobile?

Yes. The converter works in Safari and Chrome on iOS and Android. Open the page on your phone, select your SRT file, and download the VTT file.

What is the difference between SRT and VTT?

SRT (SubRip) is a simple numbered subtitle format designed for desktop media players. VTT (WebVTT) is a W3C standard designed for web video. VTT adds a mandatory header, uses dot timestamps, supports cue positioning, and is recognized by browsers. SRT is simpler but not web-compatible.

Does the VTT output work with screen readers?

Yes. VTT is designed for web accessibility. The HTML5 element exposes VTT cues to screen readers and assistive technologies, making video content accessible to users with visual and hearing impairments.

How large can the SRT file be?

There is no file size limit. The converter processes files in browser memory. SRT files are lightweight (typically 1 to 3 KB per minute of video), so even full-length movie subtitles convert instantly.

Can I add VTT cue settings like positioning?

The converter produces standard VTT without cue settings. You can manually add settings like line:50% or align:center after the timestamp line in the VTT output. For visual editing of cue settings, use the Subtitle Editor tool.

What if my SRT file has extra blank lines or formatting issues?

The converter handles common SRT formatting issues gracefully, including extra blank lines, inconsistent line endings (CRLF vs LF), and missing trailing newlines. The output VTT is always clean and valid.

Does the converter preserve line breaks within subtitles?

Yes. If your SRT subtitle has two or more lines of text, the line breaks are preserved in the VTT output. VTT supports multi-line cues, and browsers render them exactly as specified.

Can I batch convert multiple SRT files to VTT?

You can convert files one at a time in quick succession. For bulk conversion of many files, use the Batch Converter tool which supports drag-and-drop of multiple SRT files and processes them all at once.

SRT to WebVTT Converter

Fast. Private. Perfect.

100% local processing in your browser. No upload. No waiting. No limits.

Private & Secure

Blazing Fast

Free & Unlimited

SRT

1
00:00:01,000 --> 00:00:04,000
Hello, world!
 
2
00:00:04,500 --> 00:00:08,000
This is a subtitle file.
 
3
00:00:08,500 --> 00:00:12,000
Converted locally!

VTT

WEBVTT
 
00:00:01.000 --> 00:00:04.000
Hello, world!
 
00:00:04.500 --> 00:00:08.000
This is a subtitle file.
 
00:00:08.500 --> 00:00:12.000
Converted locally!

Drag & drop your SRT file here

or click to browse

Supports .srt files up to any size

100% LocalNo UploadSecureInstant

More Subtitle Tools

Subtitle Cleaner

Remove formatting and noise

Subtitle Merger

Combine multiple subtitle files

Subtitle Sync

Adjust timing with precision

Subtitle Editor

Edit content and timings

AI Subtitle Translator

Translate to 100+ languages

How It Works

Upload SRT File

Drag & drop or select your .srt file

Convert Instantly

We process it locally in your browser

Download VTT

Get your .vtt file immediately

More Conversions You Might Need

SRT VTTSRT LRC SRT ASS SRT TXT SRT TTML SRT SCC SRT STL SRT SMI

View all

LRC VTT ASS VTT SBV VTT SSA VTT TTML VTT SCC VTT STL VTT SMI VTT

Why Choose AllSubConverter?

Your Privacy Matters

Everything runs in your browser. Your files are never uploaded.

Lightning Fast

Optimized processing engine converts files in seconds.

Truly Unlimited

No file size limits. No daily limits. Completely free.

Works Everywhere

Works on Windows, Mac, Linux, iOS, Android - any modern browser.

Bridging the Most Common Subtitle Gap

SRT is the most widely used subtitle format, but browsers do not accept it. The HTML5 specification mandates WebVTT for the <track> element, and every major browser enforces this requirement. This converter performs the three essential transformations: prepends the mandatory WEBVTT header, converts SRT comma-separated millisecond timestamps (00:01:30,500) to VTT dot-separated format (00:01:30.500), and removes SRT entry numbers that VTT does not use. The output loads instantly in Chrome, Firefox, Safari, Edge, and mobile browsers.

Input Format

SRT

SRT (SubRip) is the most common plain-text subtitle format. Each entry consists of a sequential number, a timestamp line with comma-separated milliseconds (00:01:30,500 --> 00:01:35,000), and one or more lines of subtitle text. SRT files have no header, no metadata, and no styling. They are compatible with nearly every media player except web browsers.

Output Format

VTT

VTT (WebVTT) is the W3C standard subtitle format for HTML5 video. Files begin with the WEBVTT header. Each cue has dot-separated timestamps (00:01:30.500 --> 00:01:35.000) without entry numbers. VTT supports optional cue settings for positioning (line, position, align) and NOTE blocks for metadata comments.

Features

Prepends the mandatory WEBVTT header that browsers require on the first line

Converts SRT comma timestamps (00:01:30,500) to VTT dot timestamps (00:01:30.500)

Removes SRT sequential entry numbers that are not used in VTT format

Adds optional cue identifiers for programmatic subtitle control in JavaScript players

Handles SRT files with BOM, CRLF, or LF line endings gracefully

Preserves subtitle text exactly including all line breaks and special characters

Outputs UTF-8 encoded VTT recognized by all modern browsers and web players

Processes files locally in your browser with zero network requests

Why Convert?

The HTML5 <video> element only accepts WebVTT via the <track> tag. Browsers silently ignore SRT files.

YouTube subtitle upload accepts VTT and auto-syncs timing with the video timeline.

Video.js, Plyr, JW Player, and Shaka Player load VTT natively through the standard track API.

WCAG 2.1 AA accessibility guidelines reference WebVTT as the recommended caption format for web video.

Learning management systems (Moodle, Canvas, Coursera) require VTT for accessible video captions.

VTT cue settings enable basic positioning (top, bottom, left, right) that SRT cannot express.

CDN-hosted VTT files are served with the correct text/vtt MIME type by web servers, ensuring browser compatibility.

Format Differences

SRT timestamps use comma separators (00:01:30,500). VTT timestamps use dot separators (00:01:30.500).

SRT entries start with a sequential number (1, 2, 3...). VTT cues have optional string identifiers.

SRT has no file header. VTT requires the string WEBVTT on the first line.

SRT supports no positioning or styling. VTT supports cue settings (line, position, align, size).

SRT files are typically served as text/plain. VTT files should be served as text/vtt by web servers.

SRT is recognized by desktop media players. VTT is recognized by web browsers and JavaScript video players.

Common Use Cases

Website Video Embedding

Add subtitles to HTML5 video on your website. Browsers require VTT via the <track> element and will not display SRT subtitles.

YouTube Caption Upload

Upload VTT subtitles through YouTube Studio for accurate, auto-synced captions on your videos.

E-Learning Accessibility

Meet WCAG 2.1 accessibility requirements by providing VTT caption tracks for educational video content on LMS platforms.

Custom Video Player Development

Load VTT subtitle tracks in JavaScript video players (Video.js, Plyr, Shaka Player) using the standard <track> API.

Social Media Video Subtitles

Some social platforms and web-based video editors accept VTT for adding captions to promotional and social video content.

Related Formats

ASS

Advanced SubStation Alpha supports styling and positioning. Convert SRT to ASS for anime and styled subtitle needs.

TTML

TTML is required by Netflix and Apple TV. Convert SRT to TTML for streaming platform subtitle delivery.

LRC

LRC is for music lyrics. Convert SRT to LRC to repurpose subtitle content as synchronized song lyrics.

Frequently Asked Questions

Why does my SRT file not work in browsers?

The HTML5 specification defines WebVTT as the only subtitle format for the <track> element. Browsers do not include an SRT parser. If you reference an SRT file in a <track> tag, the browser ignores it. Converting SRT to VTT makes the subtitle file browser-compatible.

What changes between SRT and VTT timestamps?

The only difference is the decimal separator. SRT uses commas (00:01:30,500). VTT uses dots (00:01:30.500). The converter replaces commas with dots in the timestamp lines. Everything else about the timing (hours, minutes, seconds, milliseconds) stays the same.

Can I upload the VTT to YouTube?

Yes. YouTube accepts VTT files for subtitle uploads. Go to YouTube Studio, select your video, open Subtitles, and upload the VTT file. YouTube processes it and displays the subtitles with timing preserved.

What is the WEBVTT header?

Every VTT file must begin with the string WEBVTT on the first line, followed by a blank line. Without this header, browsers reject the file and subtitles do not display. The converter adds this header automatically.

Do SRT entry numbers get removed?

Yes. VTT does not use sequential numbers like SRT. Instead, VTT cues can have optional string identifiers. The converter removes the numeric entries from SRT. If you want cue identifiers, they can be added but are not required by the VTT specification.

Will my subtitle text change during conversion?

No. The subtitle text content is preserved exactly. Only the file format changes: the header is added, timestamp separators switch from commas to dots, and entry numbers are removed. Line breaks, special characters, and all text remain identical.

Ready to convert your subtitles?

Drop your SRT file here and convert to VTT instantly.

How to Convert SRT to SMI (SAMI) Subtitles | AllSubConverter

Convert SRT subtitles to SMI/SAMI format for Windows Media Player and multi-language captions.

Apr 7, 20262 min read

The Best Free Subtitle Converter in 2026 | AllSubConverter

Discover the best free subtitle converter in 2026. Compare format support, speed, privacy, and pricing, and see why AllSubConverter leads for SRT, VTT, ASS

Mar 20, 20264 min read

Subtitle Formats Guide: SRT, VTT, ASS, LRC | AllSubConverter

The complete 2026 guide to subtitle formats: SRT, VTT, ASS, SSA, LRC, SBV, and TTML. Compare timestamp formats, features, browser support, and best use cases.

Mar 20, 20265 min read

How to Convert SRT to VTT for Web Video — Free Guide | AllSubConverter

Learn why HTML5 web video needs VTT and how to convert SRT to VTT free online in seconds. Covers timestamp formats, the WEBVTT header, and browser support.