Your video stays on your device
Create Captions.
Make Videos Better.
Upload a video or audio file, generate accurate word-by-word captions, translate them into any language, style them exactly how you want, and export a finished MP4 — no watermarks, no subscription.
Everything you need to caption a video
Word-perfect captions
Automatic word-level timing means every caption lands exactly when it's spoken — no manual syncing.
Drag anywhere
Grab your captions and drop them exactly where you want on the frame, with snapping guides to keep things aligned.
50+ templates, 56 fonts
From TikTok word pops to cinematic lower-thirds — start from a template and customize every color, size, and animation.
70+ spoken languages
Auto-detect the spoken language, or choose it yourself — English, Spanish, Arabic, Hindi, Urdu, and many more.
Translate into 130+ languages
Turn what's said into captions in another language, still timed to the speech — an English video captioned in Arabic, or a Chinese one in English.
Private by design
Your video is styled and rendered locally and never leaves your device. Only the audio is sent securely to generate captions.
Export in one click
Download your finished MP4, plus SRT, VTT, and a full transcript.
50+ caption templates, each genuinely different
From TikTok-style word pops to broadcast lower-thirds — pick a starting point and customize every detail.
56 fonts across four style families
Search, preview, and favorite fonts right inside the editor — loaded only when you need them.
Bold
- Inter
- Poppins
- Montserrat
- Anton
- Oswald
- Bebas Neue
+8 more
Modern
- Manrope
- Outfit
- Plus Jakarta Sans
- DM Sans
- Sora
- Space Grotesk
+8 more
Social
- Luckiest Guy
- Bangers
- Titan One
- Fredoka
- Baloo 2
- Bungee
+8 more
Elegant
- Playfair Display
- Cormorant Garamond
- Libre Baskerville
- Lora
- Merriweather
- EB Garamond
+8 more
From upload to export in six steps
- 1
Upload
Drag in a video or audio file — MP4, MOV, WebM, MKV, MP3, WAV, and more.
- 2
Transcribe
Captions are generated automatically with accurate word-level timing.
- 3
Edit
Fix any word, split or merge lines, and fine-tune timing.
- 4
Style
Pick a template, font, and colors — or design your own look from scratch.
- 5
Position
Drag your captions anywhere on the frame, with alignment guides to help.
- 6
Export
Render your captioned video and download the MP4, SRT, VTT, and transcript.
Built for creators who move fast
- No account or sign-up required to start
- No watermarks on your exported video
- No per-minute pricing or hidden limits
- Your video never leaves your device
- Works offline after your first visit
- Install it as an app on desktop or mobile
Frequently asked questions
Is Captiono really free?+
Yes. There's no account, no watermark, and no per-minute pricing. Your video is styled and rendered right in your browser.
Does my video get uploaded anywhere?+
Your video file never leaves your device — styling, positioning, and rendering all happen locally. Only the extracted audio is sent securely to generate your captions, then discarded once transcription is done.
How accurate are the automatic captions?+
Captiono generates word-level timestamps with strong accuracy for clear speech. You can edit any word directly in the timeline.
Can I translate my video's captions?+
Yes. The video translator writes the captions in any of 130+ languages, still timed to the speech, and you can switch language after generating.
What file formats are supported?+
Video: MP4, MOV, WebM, MKV. Audio: MP3, WAV, M4A, and other common formats. Exports: MP4, SRT, VTT, and a transcript.
Does it work on mobile?+
Yes. The editor is touch-friendly, including dragging captions and adjusting font size, and it can be installed as an app.
Your captions are one upload away
No sign-up. No watermark. Your video stays on your device. Just better captions, in minutes.
Create Captions