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Subtitle Doctor

Get every line in good shape.

Inspect, repair, edit and synchronize SRT, ASS, SSA and WebVTT subtitles in one local workspace. Scan for timing and text issues, preview selected repairs, or apply offsets and two-point timing correction. Batch operations and CSV or JSON reports help with larger collections.

Windows · x64 · WebView2 requiredOpen source · MIT
Subtitle Doctor running on Windows with demonstration data
REAL APPLICATION / WINDOWSView full size ↗

WHAT IT DOES

A clear task.
A considered set of tools.

Subtitle Doctor keeps the workflow focused, from the first input to a result you can review.

01 / CAPABILITY

Inspect before changing

Find overlaps, duplicates, invalid timing, empty entries, long lines and encoding issues with read-only scans.

02 / CAPABILITY

Repair with a preview

Choose repairs for numbering, spacing, ordering and more. Edit cues, find and replace text, and undo session operations.

03 / CAPABILITY

Bring timing into line

Apply offsets, two-point correction or FPS changes. Convert formats and process batches with per-file results.

From input to output.

  1. Import subtitle files
  2. Inspect the diagnostics
  3. Preview edits or repairs
  4. Save a separate output

LOCAL BY DESIGN

Your workflow.
Your machine.

Subtitle files are processed locally, with no accounts, uploads or telemetry. Exports keep originals by default. Replacing a source requires confirmation and a backup; editing history is limited to the current session.