SSA to SCC Subtitle Converter
Transform SubStation Alpha subtitles into basic SCC captions privately in your browser.
Drag & drop your SSA file here
or click to browse
Supports .ssa files up to 50 MB
Free Online SSA to SCC Converter
Our SSA to SCC converter reads SubStation Alpha input and produces basic Scenarist Closed Captioning output entirely in your browser. Source SSA timing (H:MM:SS.cc centiseconds) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps). SSA override tags are stripped, line breaks become spaces, and unsupported non-ASCII characters are replaced with question marks. The conversion runs client-side, so your subtitle files are never uploaded to a server.
SSA to SCC Code Syntax & Structure Inspection
Side-by-side code inspection illustrating header definitions, timestamp syntax, and cue payload formatting
SSA vs SCC Technical Specifications
SSA
SSA (SubStation Alpha v4) is the predecessor to ASS and shares the same section-based structure: [Script Info], [V4 Styles], and [Events] with Dialogue lines. SSA supports fonts, colors, and basic positioning but predates some ASS additions such as blur. Because SSA and ASS use the same Dialogue layout, they are parsed identically.
SCC
SCC (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.
Format Differences
Conversion Troubleshooting & Gotchas
Practical solutions for player compatibility, character encoding, and timing synchronization
Subtitle timing drifts or appears out of sync on media players
Video files frequently differ in framerate (e.g., 23.976 fps vs 25 fps). If the timing drifts steadily, use our Subtitle Sync tool to adjust the global offset or framerate stretch.
Characters appear as garbled symbols or question marks (Mojibake)
Legacy files saved in Windows-1252, Shift-JIS, or GBK may render incorrectly. Our exporter standardizes output to clean UTF-8. Use our Subtitle Encoding Converter if the source file is corrupted.
Overlapping captions when multiple speakers talk simultaneously
Different formats handle overlapping dialogue differently. If your target player cannot render stacked cues cleanly, open the file in our Subtitle Editor to adjust individual cue timings.
Video editing software (Premiere, DaVinci, Final Cut) rejects the file
Professional NLE software enforces strict syntax rules. Our converter eliminates malformed line breaks and non-standard tags, producing clean, standardized files.
Features
Why Convert?
Common Use Cases
Broadcast Caption Delivery
Produce SCC files for delivery to television networks, cable operators, and playout systems requiring CEA-608.
Streaming Delivery
Generate SCC for streaming workflows whose caption specifications accept this format.
FCC Context
Generate CEA-608-style SCC files commonly used in closed-captioning workflows; final acceptance depends on the recipient’s specification.
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.
How It Works
- 1
Upload your .ssa file by dragging it in or browsing.
- 2
The parser reads the SubStation Alpha structure and extracts each cue's start, end, and text.
- 3
Source SSA timing (H:MM:SS.cc centiseconds) is converted to SCC timing (SMPTE HH:MM:SS:FF at 29.97fps).
- 4
Override tags are stripped, line breaks become spaces, and unsupported non-ASCII characters become question marks.
- 5
The output .scc file is generated and ready to download.
More Subtitle Tools
Frequently Asked Questions
It reads a SubStation Alpha file, parses each cue's timing and text, and writes a basic Scenarist Closed Captioning file using pop-on control codes. Source SSA timing (H:MM:SS.cc centiseconds) 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.
Yes. SSA styling and override tags are dropped, line breaks become spaces, and non-ASCII characters that the generator cannot encode are replaced with question marks. Timing is also 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 SSA timing (H:MM:SS.cc centiseconds) 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.
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