PrivateYour video never leaves your browser
Add Subtitles to YouTube Videos
Captions styled for YouTube. Upload your clip, pick a look and export a 16:9 video ready to post.
Drop a video or audio file
MP4, MOV, WEBM, MP3, WAV · up to 10 min on Free · no signup
01
Upload
Drop a video or audio file. It never leaves your device.
02
Edit & style
Fix any word, pick a caption style, adjust size and position.
03
Export
Download SRT/VTT free, or an MP4 with captions burned in.
Why caption your YouTube videos
Most social video is watched with the sound off. Captions keep people watching longer, make your content accessible and help YouTube understand what your video is about.
Tips for YouTube captions
Upload an SRT file in YouTube Studio for closed captions viewers can toggle, which also helps your video get found in search, or burn captions in for clips and Shorts.
FAQ
Frequently asked questions
What size should YouTube captions be?+
Use the Size slider to make captions large enough to read on a phone without covering faces. The preview shows exactly how they'll look in a 16:9 frame.
Can I add captions to YouTube videos for free?+
Yes. Transcription, editing and SRT downloads are free. Captioned video exports are free at 720p with a small watermark, or watermark-free at 1080p on a paid plan.
Is my video uploaded to your servers?+
No. Your video is processed entirely in your browser. Only a compressed audio track is sent for transcription, and it isn't stored afterwards.
How accurate are the captions?+
Very accurate for clear speech, using the latest Whisper-class speech recognition. Every word is editable, so you can fix names, jargon or slang before you export.