SRT Health Check — one click, fix everything

Upload a .srt or .vtt file: we run 8 checks, show a diagnosis report, then fix all issues in one click. 100% in your browser — your file never leaves your machine. Free, no signup.

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What we check

• Encoding damage (mojibake / replacement characters) · encoding fixer →
• Timeline ordering & overlapping cues · timing fixer →
• Timeline gaps > 2s · gap fixer →
• Malformed blocks (missing index / timecode line)
• Junk & ad lines
• Over-long lines (> 42 chars — the broadcast standard)

Deep dives: resync out-of-sync subtitles · merge SRT files · batch converter · FAQ

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