Subtitle Cleaner

Free Online Subtitle Cleaning Tool

Remove unwanted tags, SDH descriptions, speaker labels, and formatting from your subtitle files. All processing happens in your browser for complete privacy.

Common Cleaning Operations

HTML Tags

Before:

<i>Hello world</i>

After:

Hello world

Removes all HTML formatting

SDH Descriptions

Before:

[MUSIC PLAYING] Hello there

After:

Hello there

Removes sound descriptions

Speaker Labels

Before:

JOHN: How are you?

After:

- How are you?

Removes speaker names

Case Normalization

Before:

THIS IS ALL CAPS

After:

This is all caps

Converts to proper case

Why Use Our Subtitle Cleaner?

Complete Privacy

All cleaning happens in your browser. Files never leave your device.

Multi-Format Support

Works with SRT, WebVTT, ASS, SSA, and more subtitle formats.

Flexible Options

Choose exactly which elements to remove with granular controls.

Batch Processing

Clean multiple subtitle files at once and download as ZIP.

No Quality Loss

Preserves original subtitle timing and essential content.

Instant Results

Fast client-side processing with real-time preview.

Frequently Asked Questions

What is SDH and why would I remove it?

SDH (Subtitles for Deaf/Hard-of-hearing) includes sound descriptions like [MUSIC PLAYING] and [DOOR SLAMS]. While helpful for accessibility, they can be distracting for regular viewers and may appear as text in players that don't support formatting.

Will cleaning affect subtitle timing?

No, the cleaner only modifies the text content. All timestamps and timing information remain exactly the same.

Can I undo the cleaning if I don't like the result?

The original files are never modified. You can always re-upload the original files and try different cleaning options.

What formats are supported?

We support SRT, WebVTT (VTT), ASS, SSA, SAMI (SMI), and MicroDVD (SUB) formats. The output will be in the same format as the input.

Is there a file size limit?

Each file can be up to 10MB, and you can process up to 50 files at once. This is more than enough for feature-length movies and TV series.

Are my files uploaded to a server?

No, all processing happens entirely in your browser using JavaScript. Your files never leave your device, ensuring complete privacy.