VTT to SCC Subtitle Converter
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Supports .vtt files up to 50 MB
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How It Works
Upload VTT File
Drag & drop or select your .vtt file
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Download SCC
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Lightning Fast
Optimized processing engine converts files in seconds.
Free & Local
Each file can be up to 50 MB. Batches can contain up to 200 files or 1 GB total.
Works Everywhere
Works on Windows, Mac, Linux, iOS, Android - any modern browser.
Free Online VTT to SCC Converter
This browser-based converter reads timestamped WebVTT cue blocks, discards cue identifiers and cue settings, and writes a Scenarist_SCC V1.0 file containing basic pop-on caption data. Text is encoded as hexadecimal byte pairs, timing is quantized to a 29.97 fps frame grid, and characters outside the printable ASCII range are replaced with question marks.
Input Format
VTTVTT (WebVTT) is a text subtitle format for web video. A VTT file starts with a WEBVTT header and uses HH:MM:SS.mmm --> HH:MM:SS.mmm cue timing. It can also contain cue identifiers, cue settings, inline tags, NOTE blocks, and style metadata.
Output Format
SCCSCC (Scenarist Closed Captioning) represents CEA-608 caption data as hexadecimal byte pairs paired with HH:MM:SS:FF timecodes. SCC output from this converter includes the Scenarist_SCC V1.0 header, basic pop-on control codes, and printable ASCII caption text.
Features
Why Convert?
Format Differences
Common Use Cases
Basic Caption Draft
Create a basic SCC draft from web captions before checking it in dedicated caption software.
Tool Interchange
Move timestamped VTT cues into a caption workflow that accepts Scenarist SCC input.
Text Simplification
Convert multiline Unicode web subtitles into single-line printable ASCII caption data when that restriction is acceptable.
Web and Caption Copies
Keep a VTT version for web playback while producing a basic SCC copy for another workflow.
Offline Conversion
Process subtitle files locally when uploading program captions to another service is not appropriate.
Timing Review
Quantize millisecond VTT timing to a 29.97 fps frame grid for caption-oriented review.
Related Formats
Frequently Asked Questions
It preserves cue timing and text after conversion constraints are applied: line breaks become spaces, only printable ASCII can be encoded, and unsupported characters are replaced with question marks. VTT inline tags are treated as literal text rather than converted to CEA-608 styling.
Millisecond VTT timing is quantized to HH:MM:SS:FF values on a 29.97 fps frame grid. The output uses colon-separated frame values and does not add drop-frame metadata.
The output uses basic pop-on control codes. Roll-up and paint-on modes are not selectable in this converter.
Cue identifiers and settings such as line, position, size, and align are discarded. The generated SCC uses basic pop-on caption controls and does not map VTT positioning or alignment.
No. Tags such as italic, bold, or voice spans remain as literal source text if they are present in the parsed cue. They are not translated into CEA-608 mid-row or PAC control codes.
The generated caption data is limited to printable ASCII. Characters outside that range, including accented characters and CJK text, are replaced with question marks. Use a dedicated captioning workflow if full CEA-608 extended-character support is required.