Subtitle Doctor

Subtitle Doctor is a free MIT-licensed offline Windows utility by ALMARFELD. Inspect SRT, ASS, SSA and WebVTT; preview repairs, edit cues, adjust offsets/FPS, convert formats and export reports. v1.0.1 preserves balanced tags during split/wrap and refuses incompatible merges. No video preview, translation or speech timing detection. Advanced styling can be lost on conversion; review exports. Unreadable blocks and invalid timing block export. Originals are preserved by default; optional replacement needs confirmation and a backup. Undo is session-only. Windows 10/11 x64 portable ZIP: extract fully and run SubtitleDoctor.exe. Separate Microsoft Edge WebView2 Runtime required; nothing installs automatically. No accounts, uploads or telemetry. The executable is not Authenticode signed.

Features

Inspect SRT, ASS, SSA and WebVTT subtitle files
Preview selectable subtitle repairs before saving
Split and wrap balanced formatting without breaking tags
Refuse merges with incompatible timing, metadata or formatting
Adjust offsets, two-point synchronization and FPS
Export new subtitle copies and JSON/CSV reports

Project Samples

Subtitle Doctor v1.0.1 — actual application with synthetic demonstration data.

Project Activity

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License

MIT License

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Subtitle Doctor Web Site

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Additional Project Details

Operating Systems

Windows

Registered

2026-10-24

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