01
Upload your video
Choose an MP4, MOV, WebM, or MKV file and select the language being spoken. Your source video stays in this browser.
AI VIDEO CAPTION GENERATOR
AI Caption Generatorfor Video
Generate accurate, timed captions. Review the words AI is least sure about, add motion and style, then export a video made to be watched with the sound on or off.
Your video stays on this device
- No signup to try
- 37 built-in styles
- Source video stays local
LIVE STYLE PREVIEW 9:16 SAFE
WORKS WITH SOUND OFF
FIX LOOP3 words to checkNot 42 captions
Ready to exportStyle stays in the video
CAPTIONS BUILT FOR THE FEEDTikTokInstagram ReelsYouTube ShortsLinkedInX
FROM SPEECH TO SCREEN
Caption a video in three focused steps.
Start with automatic timing, review the risky words, and finish with a look that stays intact after publishing.
02
Generate and review
AI creates timed captions while Fix Loop gathers lower-confidence words into one focused queue for a faster review.
03
Style and export
Choose a caption style, adjust its animation and layout, then export a captioned video that keeps the same look everywhere.
ANIMATED CAPTION STYLES
Give every word a reason to stay on screen.
Pick a strong starting point, then tune the font, colors, background, motion, and position in the editor.
01
HypeWord-by-word energy
02
OutlineClean contrast
03
ProgressReadable rhythm
04
HighStrong emphasis
37 built-in styles · every style available to try
REVIEW QUEUE3words worth checking
All clear is the finish line
ACCURACY WITHOUT THE SCAVENGER HUNT
AI should tell you where to look.
A transcript can be mostly right and still miss the name that matters. Fix Loop gathers lower-confidence words into one queue so you can replay, correct, or keep each moment in context.
- 01 Jump to lower-confidence words
- 02 Hear the exact surrounding audio
- 03 Accept a suggestion or keep the original
- 04 Style after the queue reaches All clear
MAKE THE CAPTIONS YOURS
Control the look without learning a timeline.
Caption styling stays connected to readable text and safe placement, so a visual change does not become a layout repair job.
Set font, case, color, outline, and emphasis for the words that land.
Choose phrase or word motion and preview the timing against the video.
Position captions for vertical and landscape frames without hiding them under app UI.
MADE FOR WATCHING
One caption workflow. More than one kind of video.
Use the same generate, review, and style loop for daily creator clips or repeatable branded delivery.
Short-form video
Keep every word readable in a 9:16 frame and away from platform controls.
Talking-head clips
Turn interviews, explainers, and product demos into videos that work with sound off.
Branded delivery
Match fonts, colors, backgrounds, and motion to a repeatable visual system.
CAPTIONS THAT KEEP THEIR LOOK
Burn them in when the design matters.
Open captions become part of the picture, so the chosen font, color, animation, and position appear the same on every platform. Need a switchable subtitle track instead? Export an SRT or VTT file with Pro or Max.
- Style always visible
- Animation preserved
- Works without subtitle support
- Viewer can switch it off
- Text remains editable
- Styling handled elsewhere
LOCAL-FIRST VIDEO HANDLING
Your video stays in your browser.
01 Select video locally→02 Extract audio in browser→03 Send audio for transcription
SubtitleGenerator keeps the source video on your device for preview and export. Only the extracted audio needed for speech recognition is processed remotely.
AI CAPTION GENERATOR FAQ
Before the first upload.
What is an AI caption generator for video?
An AI caption generator turns spoken audio into timed text, places that text over the video, and lets you review and style it before export. SubtitleGenerator is for captions inside videos—not social media post-copy captions.
How do I automatically add captions to a video?
Upload a supported video, choose its spoken language, and generate the first caption pass. Review words flagged by Fix Loop, choose a style and animation, then export the captioned video.
Can I create animated captions?
Yes. The editor includes built-in caption styles and animation controls with a live video preview. You can also adjust layout, font, background, and safe positioning before export.
Is the AI caption generator free?
You can try caption generation and editing without signing up. A Free account includes monthly processing minutes, every built-in style, and around-720p video export with a small watermark. Paid plans add more minutes and clean HD export.
How accurate are automatically generated captions?
Accuracy varies with speech clarity, background noise, accents, names, and technical language. Fix Loop highlights lower-confidence words so you can replay their context and review the places most likely to need attention.
Are these open captions or closed captions?
Captions exported inside the video are open captions: they are always visible and keep their styling. Downloadable SRT or VTT tracks can be switched on and off by compatible players, but automatic non-speech descriptions such as music or applause may still need to be added manually.
Does my original video get uploaded?
No. The original video stays in your browser for preview and export. Only an extracted audio copy is sent for speech recognition when you generate captions.
UPLOAD. REVIEW. STYLE. PUBLISH.
Make captions people want to watch.
Free to try · no credit card · source video stays local