Stoic / Free tools

Video & subtitle tools

For the file that will not play right, and the subtitles that need a little care.

Video Doctor

Check video metadata for playback risks, subtitle compatibility and missing information.

HDR & Dolby Vision Checker

Identify HDR transfer functions and Dolby Vision profiles from your file's metadata.

Subtitle Font Preview

Find a subtitle style that is comfortable to read.

Subtitle Timing & Encoding Fixer

Shift subtitle timing and export a clean UTF-8 text track.

Mac Playback Troubleshooter

Start with the symptom. Get the checks that matter.

Your files stay with you

Metadata, subtitle files and fonts are processed in your browser. These tools do not upload movies, call an AI service or require an account. Results describe the information you supply, not measured playback performance.

Read the Mac playback guides