TTML to SCC Converter
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Supports .ttml files up to any size
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Why Choose AllSubConverter?
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Everything runs in your browser. Your files are never uploaded.
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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.
Free Online TTML to SCC Converter
Our TTML to SCC converter reads Timed Text Markup Language input and produces Scenarist Closed Captioning output entirely in your browser. Source TTML timing (seconds (1.500s) or clock values) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps). Styling and markup that the target format cannot represent are normalized or stripped, leaving valid, ready-to-use output. The conversion runs client-side, so your subtitle files are never uploaded to a server.
Input Format
TTMLTTML (Timed Text Markup Language) is an XML-based subtitle format standardized by the W3C and required by Netflix, Apple TV, and many broadcast workflows. Captions live in <p> elements with begin and end (or dur) attributes that express time either as seconds (1.500s) or as clock values (HH:MM:SS.mmm). The related ITT (iTunes Timed Text) format shares the same XML structure and is handled the same way.
Output Format
SCCSCC (Scenarist Closed Captioning) is the industry-standard format for delivering CEA-608 (Line 21) closed captions to North American broadcast television and streaming services. SCC encodes caption text as hexadecimal byte pairs paired with SMPTE timecodes at 29.97 fps and begins with a Scenarist_SCC V1.0 header.
Features
Why Convert?
Format Differences
Common Use Cases
Broadcast Caption Delivery
Produce SCC files for delivery to television networks, cable operators, and playout systems requiring CEA-608.
Streaming Compliance
Generate SCC to meet Netflix, Amazon Prime, or Hulu caption delivery specifications.
FCC Compliance
Deliver CEA-608 compliant SCC files to satisfy FCC closed-captioning requirements.
Related Formats
SRT (SubRip)
The universal plain-text alternative: convert to SRT for maximum device compatibility.
VTT (WebVTT)
The web alternative: convert to VTT if your target is HTML5 video or YouTube.
STL (Spruce Subtitle)
The DVD/broadcast alternative: convert to STL for Spruce or DVD authoring workflows.
Frequently Asked Questions
It reads a Timed Text Markup Language file, parses each cue's timing and text, normalizes the structure for Scenarist Closed Captioning, and writes a valid .scc file. Source TTML timing (seconds (1.500s) or clock values) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps).
Absolutely. Every conversion runs client-side in your browser. No subtitle data, file contents, or metadata is ever transmitted to a server.
TTML and SCC both support styling, but their styling models differ. Styling that cannot be mapped is normalized or dropped, while dialogue text and timing are always preserved.
Yes, completely free with no sign-up, no watermarks, and no file size limits. All processing happens in your browser, so your files are never uploaded to a server.
Source TTML timing (seconds (1.500s) or clock values) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps).
Yes. The converter is fully responsive and works in any modern mobile browser on iOS and Android.