
Captioner.io
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Add accurate, multilingual subtitles to videos - fast, right in your browser.

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ByteCap

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Overview
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.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.
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Releases
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September 2, 2025
Haoran Liang
Initial release of Captioner.io.

Top alternatives
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10,756144Released 2y agoFree + from $10fess🙏 1 karmaOct 30, 2024Best, but not working :/
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8,24650v1 released 2y agoFree + from $10.00/moSupertranslate est un outil basé sur l'IA qui permet aux utilisateurs d'ajouter automatiquement des sous-titres anglais aux vidéos dans n'importe quelle langue. Il est alimenté par Whisper d'OpenAI, le moteur de synthèse vocale le plus précis au monde. Le processus est simple et direct : les utilisateurs peuvent télécharger une vidéo dans n'importe quelle langue sur la plateforme, générer des sous-titres, puis télécharger le fichier .srt ou .vtt. La plateforme dispose également d'un éditeur de sous-titres intuitif qui permet aux utilisateurs de diviser, fusionner et ajuster les codes temporels des sous-titres générés. Supertranslate est gratuit, sans carte de crédit requise et peut être annulé à tout moment.
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7,15055Released 2y agoFrom $60/mo
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5,81337Released 2y agoFree + from $15/moIt doesn't create the subtitles and it doesn't let you upload them. You can only create them manually
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5,09535Released 2y agoFree + from $10
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4,80746Released 7mo agoFree + from $15/moAmazing tool! Just started working on my videos and I’m loving everything RenderCut offers. It’s super easy to use and saves me a ton of time with subtitles. 5 tacos, no doubt!
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