What errors does this subtitle validator detect?

Our validator checks both SRT and VTT files for sequence number errors, invalid timestamp formats, timing issues (start time after end time), overlapping subtitles, large gaps between entries, and empty subtitle blocks.

How do I fix subtitle sequence numbers?

Simply upload your SRT or VTT file and our tool will automatically detect and correct sequence numbers. Preview the changes and download the fixed file with one click.

Can I convert between SRT and VTT formats?

Yes! Upload an SRT file to convert it to VTT, or upload a VTT file to convert it to SRT. Both directions are supported with one-click download.

Which languages are supported for quality checks?

The quality check supports 8 languages with language-specific rules: English (EN), German (DE), Spanish (ES), French (FR), Japanese (JA), Korean (KO), Traditional Chinese (ZH-TW), and Simplified Chinese (ZH-CN). Each language has tailored guidelines based on Netflix's official style requirements.

Does the quality check fix my subtitles automatically?

No, the quality check provides detailed feedback and suggestions rather than automatic fixes. You'll receive a comprehensive report highlighting issues with specific recommendations, which you can then apply using your preferred subtitle editor. This gives you full control over the creative decisions.

Subtitle Doctor - Free SRT & VTT Validator, Fixer & Netflix Quality Check

Free online subtitle validator with auto-fix and Netflix-standard quality checks. Validate SRT & VTT files, fix format errors, and get professional feedback based on industry guidelines.

Features

SRT and VTT file validation
Automatic sequence number correction
Timestamp format checking
Overlap detection
SRT to VTT conversion
VTT to SRT conversion
Netflix style guide validation
Reading speed (CPS) analysis
8 language support

Frequently Asked Questions

What errors does this validator detect?

Our validator checks for sequence number errors, invalid timestamp formats, timing issues, overlapping subtitles, large gaps between entries, and empty subtitle blocks.

Is my subtitle file data secure?

Yes! All processing happens directly in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

What is the streaming quality check?

The streaming quality check validates your subtitles against Netflix's official style guidelines - the industry gold standard for professional subtitles.

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