kitio.aiAdded Nov 5, 2026
Fastsub
Freemium · $9.90 one-timeBrowser subtitle generator with free translation into 206 languages
What is Fastsub?
Fastsub transcribes the speech in a video and builds editable subtitles, then translates them into any of 206 languages at no extra cost. The video stays in your browser and only a small audio stream is sent for transcription, which suits creators wary of uploading footage.
Speech in 30-plus languages is detected automatically. A visual editor lets you rewrite lines, split or merge cues and preview styling live, and you can export SRT or ASS files or burn the subtitles into an MP4 locally using your own hardware.
Separate tools translate existing SRT, VTT and ASS files with timestamps intact, convert between subtitle formats and extract audio tracks. Credits are bought in packs, with one credit covering one minute of transcription, and each pack stays valid for a year.
Features
- AI subtitle generation
- Translation into 206 languages
- Bilingual side-by-side subtitles
- Local burn-in to MP4
- SRT and ASS export
- Subtitle format converter
Tags
Releases
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Organization
Fastsub
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $9.90 one-time
- Billing frequency
- One-time
Fastsub plans
Free trial
Free
- 30 minutes of transcription
- Max 10 minutes per file
- Free translation
Base
$9.90 one-time
- 600 minutes, valid 365 days
- Up to 2 hours per file
- Project history saved
Plus
$39.90 one-time
- 3,000 minutes, valid 365 days
- Lowest per-minute rate
Prices in USD, checked Nov 5, 2026. Plans change often, so confirm on the Fastsub site.Official pricing
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Pros and cons
Pros
- Video file never leaves your browser
- Translation is free on every plan
- Credits last a full year
Cons
- Free trial caps files at 10 minutes
- Transcription limited to about 30 source languages
- Burn-in speed depends on your device
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Q&A
What is Fastsub?
Fastsub transcribes the speech in a video and builds editable subtitles, then translates them into any of 206 languages at no extra cost. The video stays in your browser and only a small audio stream is sent for transcription, which suits creators wary of uploading footage.
Does Fastsub upload my video?
No. The video is processed in your browser, and only a small audio stream is sent to the cloud for speech recognition.
Which subtitle formats can Fastsub export?
You can download SRT or ASS files, or burn the subtitles directly into an exported MP4.
How much does Fastsub cost?
Fastsub is freemium, with paid plans from $9.90 one-time.
Is there a free version of Fastsub?
Yes. Fastsub has a free plan, and paid plans add more usage and features.
What are the main features of Fastsub?
AI subtitle generation, Translation into 206 languages, Bilingual side-by-side subtitles, Local burn-in to MP4, SRT and ASS export, Subtitle format converter.
Who makes Fastsub?
Fastsub is made by Fastsub.
What are the best alternatives to Fastsub?
Popular alternatives include Taption, CaptionCreator, Banva.