Question 1

Are my batch subtitle files uploaded to a remote server?

Accepted Answer

No. Every file in your batch is parsed, validated, and repaired directly inside your web browser using HTML5 File APIs. No audio, video, or subtitle text is ever sent across the network.

Question 2

How many subtitle files can I process simultaneously?

Accepted Answer

You can drop and process up to 20 subtitle files in parallel at once. All repairs happen locally in your browser memory.

Question 3

What formats can I mix together in a single batch?

Accepted Answer

You can mix SubRip (.srt), WebVTT (.vtt), YouTube (.sbv), and Advanced SubStation Alpha (.ass / .ssa) files in the same batch. SubPreflight detects the format of each file automatically.

Question 4

What is included in the downloaded ZIP archive?

Accepted Answer

The generated ZIP file contains all repaired subtitle files organized inside a folder, plus a consolidated batch-qc-summary.csv report with itemized cue counts and error breakdowns.

Batch Subtitle Validator

Drop your subtitle files here to batch inspect

Batch Subtitle Validator

Drop your subtitle files here to batch inspect

Batch Results