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What is PolySub?
PolySub enables users to upload videos and select source and target languages for subtitle generation. The system applies specialized logic during processing to produce verified subtitles that avoid common translation errors. Results can be downloaded as files or as videos with burned-in captions. The service targets content creators needing captions for social media, educators converting lectures into accessible transcripts, and agencies localizing materials for international audiences. It operates on a credit system where purchases provide minutes of processing without recurring fees or expiration dates. Built on cloud infrastructure, PolySub handles videos up to specified durations and sizes while maintaining security for uploaded files. It emphasizes accessibility for global viewers and those with hearing needs through its language support and verification steps.
Key features
Context-aware subtitles powered by multi-stage AI
WebVTT (.vtt) export and burned-in captions
Support for 24+ languages with verification
Cloud processing on Google Cloud infrastructure
Credit-based pay-as-you-go pricing, no subscriptions
Secure file storage and agentic workflow
Maximum video duration up to 2 hours
What you can use PolySub for
Content Creators & YouTubers
Burn professional, high-impact captions into MP4s for TikTok, Reels, and Shorts to keep viewers engaged even when videos play on mute.
Coaches, Teachers, & HR
Turn lectures into perfectly synced VTT transcripts in seconds to boost retention and meet accessibility standards.
Marketing & Agencies
Localize webinars, ads, and internal training for worldwide teams using support for 24+ languages with context-aware verification.
How to use PolySub
- 1Sign up at the site and receive 10 free minutes
- 2Upload your video file and select original plus target languages
- 3Choose WebVTT export or burned-in captions option
- 4AI processes the file using multi-stage context-aware models
- 5Download the subtitles or captioned video
PolySub pricing
Pricing model: Paid. Plan details are indicative — check the site for current prices.
Starter
€6one-time
- 120 credits
- Burned-in subtitles
- WebVTT file export
- 24+ languages
- Cloud processing
- Secure file storage
- Maximum video duration - 1 hour
- Maximum file size - 1 GB
Pro
Popular€15one-time
- 360 credits
- Burned-in subtitles
- WebVTT file export
- 24+ languages
- Cloud processing
- Secure file storage
- Maximum video duration - 1 hour
- Maximum file size - 1 GB
Studio
€30one-time
- 900 credits
- Burned-in subtitles
- WebVTT file export
- 24+ languages
- Cloud processing
- Secure file storage
- Maximum video duration - 2 hours
- Maximum file size - 2 GB
Editor's verdict
Pros
- +No subscriptions or hidden fees
- +Fast professional subtitle generation
- +10 free minutes on signup
Cons
- –Credit purchase required after free minutes
- –Maximum video duration and file size limits
Our take: PolySub is a solid video generation choice. It's valued for no subscriptions or hidden fees and fast professional subtitle generation. The main trade-off is credit purchase required after free minutes. Best when you need reliable, professional output.
Frequently asked questions
It uses a multi-stage AI engine with subject-specific logic and agentic workflow to avoid robotic literal translations and generate verified subtitles.
Summary
PolySub is a solid video generation choice. It's valued for no subscriptions or hidden fees and fast professional subtitle generation. The main trade-off is credit purchase required after free minutes. Best when you need reliable, professional output.
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