Subtitle Code Validator
Check subtitle file structures for overlapping timestamps, line wraps, or syntax bugs.
Broadcast Subtitle Standards
Professional streaming and television platforms enforce strict constraints on caption files. Failing compliance testing can lead to rejected distributions or unreadable text on smaller viewports.
CEA-608 Limits
Maximum 32 to 42 characters per line, up to 2 lines per subtitle card. This prevents text from wrapping awkwardly on older television displays.
Minimum Timing gaps
Minimum gap of 1 frame (approx. 33ms to 40ms) between subtitle entries. This prevents caption cards from overlapping or flickering.
Duration range
Subtitle cards must display for at least 0.8 seconds to remain readable, but no more than 6.0 seconds per card.