Everything you need to caption a video, in one editor
Captiono combines automatic transcription, a full styling toolkit, and a real-time preview into a single browser tab. Nothing here requires an account, a plugin, or a file upload — every feature below runs on your own device.
Word-level timestamps, out of the box
When you upload a video or audio file, captions are generated automatically with timing attached to every individual word — not just each sentence or segment. That precision is what makes word-pop and karaoke-style animations possible, and it means your captions land exactly on the beat of the spoken audio.
- Automatic transcription with per-word start and end times
- Click any word in the transcript to jump to that moment in the video
- Split or merge caption segments without losing word timing
- Fix a misheard word directly in the timeline — timing stays intact
58+ templates and 56 fonts
Start from a genuinely different look for every use case, then customize colors, weight, spacing, outlines, shadows, and background down to the pixel.
58+ caption templates
From TikTok-style word pops and karaoke fills to clean broadcast lower-thirds — every template is a distinct starting point, not a palette swap.
56 curated fonts
Organized into 4 categories — bold, modern, social and elegant— so you can match the tone of your video, from punchy social type to elegant serif.
Full manual control
Every template is just a starting point. Adjust text and highlight color, outline, shadow, background opacity, letter spacing, line height, and box padding independently.
15 animations, and captions you can drag anywhere
Grab the caption box in the live preview and drop it exactly where you want on the frame. Snapping guides appear as you drag, so it's easy to center captions, align them to the edges, or tuck them safely away from platform UI overlays like buttons and caption bars.
Frame it right for every platform
We detect your video's own aspect ratio automatically — nothing is ever cropped or reshaped, whatever format you upload.
TikTok / Reels / Shorts
Vertical full-screen format for TikTok, Reels, and Shorts.
YouTube
Widescreen format for YouTube and standard playback.
Square
Square format for feed posts.
Portrait format optimized for the Instagram feed.
16+ languages
Let Captiono auto-detect the spoken language, or pick it yourself for the most reliable results. Right-to-left scripts like Arabic and Urdu, and non-Latin scripts like Hindi, Japanese, and Korean, are all rendered correctly in the preview and in your exported video.
Download the format you actually need
MP4
Your source video with captions burned in, ready to upload anywhere.
SRT
The standard subtitle format, accepted by every major platform and editor.
VTT
Web-native subtitles for HTML5 video players and streaming platforms.
JSON
The full transcript with word-level timestamps, for developers and archives.
On-device privacy
Your video is styled and rendered locally, in your browser, and never uploaded anywhere. Only the audio is sent securely to generate your captions.
Installable app
After your first visit, the app itself is cached in your browser, so it opens instantly and styling and rendering keep working without a connection. Generating new captions needs an internet connection.
Installable app
Install Captiono to your desktop or home screen for a full-screen, app-like experience, with no browser tabs in the way.
Prefer a walkthrough of the whole process from start to finish? See how it works.
Curious about the language and export options in more depth? Try the subtitle generator page.
Your captions are one upload away
No sign-up. No watermark. Your video stays on your device. Just better captions, in minutes.
Create Captions