
Captioner.io
Inputs:
Outputs:
Add accurate, multilingual subtitles to videos - fast, right in your browser.
Author
Captioner is a browser-based subtitle platform built for creators who care about accuracy. Upload an MP4 or MOV and get highly accurate speech-to-text in 98+ languages, with timestamps aligned for video, not just raw transcripts. Word-level timing and precise line breaks mean minimal cleanup and a smoother editing flow.Haoran Liang
🛠️ 1 tool
It’s designed to slot into real creator workflows. Import an existing transcript and auto-sync it to your video (think YouTube auto-sync, but tighter), then refine everything in an editor made specifically for subtitles. When you’re done, export SRT, VTT, or SBV for your editor—or burn captions directly into the video in your chosen style up to 4K.
Captioner also supports quick translation (currently English → Mandarin Chinese in Express) and long videos up to 3 hours per file, with unlimited total minutes. It optimizes for accuracy over raw speed, so you spend less time fixing mistakes and more time publishing.
Show more
Releases
Get notified when a new version of Captioner.io is released
Notify me

September 2, 2025
Haoran Liang
Initial release of Captioner.io.
Pricing
Pricing model
Free Trial
Paid options from
$5/month
Billing frequency
Monthly

Featured alternatives
-
93,567306v2.0 released 1mo ago#30 in Trendingbob miller🙏 64 karmaMay 22, 2024Generating captions was super fast like seconds. Wish they had Anton font though