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Subtitle QA Report

Fast. Private. Perfect.

Get an overall quality score and a multi-dimension breakdown of your subtitle file, just like a broadcast QC report.

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SRT, VTT, ASS, SSA, LRC, SBV, TTML, SCC, STL, SMI, TXT

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How It Works

1

Upload your subtitle file. SRT, VTT, ASS, SSA, LRC, SBV, TTML, SCC, STL, and SMI are supported.

2

The QA engine runs the subtitle checker and computes statistics across all cues.

3

Six quality dimensions are scored independently, then combined into an overall score.

4

Review the dimension breakdown, issue counts, and a quality summary.

5

Export the full report as text, Markdown, or HTML for your delivery package or records.

Why Choose AllSubConverter?

Your Privacy Matters

Everything runs in your browser. Your files are never uploaded.

Lightning Fast

Optimized processing engine converts files in seconds.

Truly Unlimited

No file size limits. No daily limits. Completely free.

Works Everywhere

Works on Windows, Mac, Linux, iOS, Android - any modern browser.

What the QA Report Analyzes

Overall quality score from 0-100 based on weighted dimension scores.
Timing dimension: detects overlaps, short gaps, and suspicious time jumps.
Reading Speed dimension: analyzes average and peak CPS (characters per second).
Consistency dimension: flags unusually short or long cue durations.
Style dimension: flags lines that exceed recommended character length limits.
Content dimension: detects empty or missing subtitle cues.
Encoding dimension: checks for mixed CJK/Latin content edge cases.
Export the full QA report as text, Markdown, or HTML for delivery or archiving.

Who Needs a QA Report?

Broadcast Delivery

Attach a QA report to your subtitle delivery package to prove compliance with broadcast quality standards.

Streaming Platforms

Verify that subtitle files meet Netflix, Amazon, and Disney+ quality requirements before submission.

Localization Teams

Add a QA scorecard to translated subtitles so reviewers can prioritize files that need attention.

Fansub Quality Control

Run a QA pass on finished subtitles to catch timing and readability issues before release.

Post-Production QC

Integrate a quick QA check into your subtitle QC workflow before final export and delivery.

Accessibility Audits

Document subtitle quality for WCAG and accessibility compliance reporting.

Frequently Asked Questions

A QA (Quality Assurance) report analyzes a subtitle file across multiple dimensions and produces an overall quality score. It flags timing overlaps, high reading speed, inconsistent durations, over-length lines, empty cues, and encoding risks.

90+ is excellent and broadcast-ready. 75-89 is good quality with minor issues. 50-74 is fair and needs fixes before publishing. Below 50 is poor and requires manual review.

Yes. The full report including the overall score, dimension breakdown, and detailed issues can be exported as plain text, Markdown, or a styled HTML document.

The overall score (0-100) is a weighted average of six dimensions: Timing (25%), Reading Speed (25%), Consistency (15%), Style (15%), Content (15%), and Encoding (5%). Each dimension starts at 100 and is penalized for each issue found.

No. All analysis happens entirely in your browser. Your subtitle files never leave your device.

Input: SRT, VTT, ASS, SSA, LRC, SBV, TTML, SCC, STL, SMI. Export: text, Markdown, or HTML report.

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Get an overall quality score and a multi-dimension breakdown of your subtitle file, just like a broadcast QC report.