Sub Cleaner

How to Remove Ads from SRT Subtitle Files

A complete guide to cleaning up your subtitle files and removing unwanted ads, watermarks, and promotional content.

What Are Subtitle Ads?

Subtitle ads are promotional text blocks injected into SRT subtitle files by subtitle providers and sharing sites. They typically appear at the beginning or end of a video as on-screen text advertising the subtitle source, containing URLs, credits like "Subtitles by...", or calls to action like "Visit our website" or "Support us on Patreon". These ads are distracting and have no relation to the actual video content.

Using SubCleaner Online

The fastest way to remove ads from your subtitle files is with our free SRT Subtitle Ad Remover. It runs entirely in your browser — no files are uploaded to any server.

  1. Upload or paste your .srt file into the tool
  2. Click "Clean Subtitles" — the tool scans every subtitle block for ad patterns
  3. Review the diff — removed blocks are highlighted in red so you can verify what was cleaned
  4. Download or copy the cleaned file
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Using with Bazarr

If you use Bazarr to automatically download subtitles for your Plex, Jellyfin, or Emby media server, you can clean subtitles as a post-processing step:

  1. Download subtitles normally through Bazarr
  2. Use SubCleaner to clean the downloaded .srt files before they are picked up by your media server
  3. For automation, consider using the subcleaner CLI tool as a Bazarr post-processing script

This ensures your subtitles are always ad-free without manual intervention for each file.

Supported Ad Patterns

SubCleaner detects and removes subtitle blocks that contain the following types of content:

  • URLs and domains — links starting with http://, https://, www., or containing common TLDs (.com, .net, .org, .io)
  • Credit watermarks — "Subtitles by", "Encoded by", "Synced by", "Translated by", "Corrected by", "Captioned by", "Ripped by"
  • Source attributions — "Downloaded from", references to OpenSubtitles, Addic7ed, Subscene
  • Promotional text — "Visit our", "Support us", "Donate", "Patreon"

A subtitle block is only removed when all of its non-empty text lines match at least one ad pattern. If a block contains a mix of real dialogue and ad text, it is preserved to avoid removing actual subtitle content.

Frequently Asked Questions

Conclusion

Subtitle ads are a common nuisance for media server users. Whether you're cleaning a single file or processing subtitles in bulk, SubCleaner makes it easy to remove unwanted promotional content while preserving the actual subtitle text.

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