STL to SCC Subtitle Converter
Fast. Private. Perfect.
100% local processing in your browser. No upload. No waiting.
Drag & drop your STL file here
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Supports .stl files up to 50 MB
More Subtitle Tools
How It Works
Upload STL File
Drag & drop or select your .stl file
Convert Instantly
We process it locally in your browser
Download SCC
Get your .scc file immediately
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.
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 STL to SCC Converter
Our STL to SCC converter reads Spruce Subtitle text input and produces basic Scenarist Closed Captioning output entirely in your browser. Source STL timing is converted to SCC timing at 29.97 fps. Bracketed inline tags are removed, cue line breaks become spaces, and unsupported non-ASCII characters become question marks. The conversion runs client-side, so your subtitle files are never uploaded to a server.
Input Format
STLSTL (Spruce Subtitle) is a text-based subtitle format used in DVD authoring and some broadcast workflows. Each entry uses comma-separated start and end timecodes followed by the subtitle text, with the pipe character (|) denoting line breaks. This text STL variant is distinct from the binary EBU STL broadcast format.
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 for streaming workflows whose caption specifications accept this format.
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 Spruce Subtitle text file, parses each cue's timing and text, and writes a basic Scenarist Closed Captioning file using pop-on control codes. Source STL timing is converted to SCC timing at 29.97 fps.
Absolutely. Every conversion runs client-side in your browser. No subtitle data, file contents, or metadata is ever transmitted to a server.
Yes. Bracketed tags are removed, line breaks become spaces, unsupported non-ASCII characters become question marks, and timing is quantized to the SCC frame grid.
Yes, completely free with no sign-up, no watermarks, and files up to 50 MB each. All processing happens in your browser, so your files are never uploaded to a server.
Source STL timing (SMPTE HH:MM:SS:FF frame timecodes) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps).
Yes. The responsive page works in modern mobile browsers.