Add modern captions.
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Easiest AI caption generator, synced to audio.
No watermark, Free and Beautiful.
Caption any video, your style
AI-powered transcription, animated text effects, and one-click templates — all running entirely in your browser.
Everything to caption like a pro
Runs entirely in your browser. Your files never leave your device.
AI Transcription
Drop any audio or video file. Word-level timestamps synced to speech — supports 99+ languages including English, Hindi, and Hinglish.
Powered by Whisper AI
Animated Effects
13 entrance animations — from subtle fades to cinematic glitch and neon pulse.
50+ Fonts
Sans-serif, condensed, display, script, mono — all loaded via Google Fonts. Free forever.
Visual Scene Editor
Split, merge, reorder clips. Drag words, set per-word styles, preview in real time.
100% Offline
Transcription, editing, and export all run in your browser. No uploads, no servers, no accounts.
One-Click Export
Broadcast-quality output up to 4K. No watermark, no branding — yours forever.
Use Cases
AI Captions for Every Platform and Content Type
Whether you're a content creator, podcaster, educator, or marketer — add captions to video free in your browser.
Animated Caption Styles
How VideoCaptions.AI Compares
See why creators choose VideoCaptions.AI over cloud-based tools that require uploads and charge monthly fees.
Frequently Asked Questions
Everything you need to know about the free AI video caption generator.
Can't find what you're looking for? Contact us
VideoCaptions.AI is a free AI video caption generator that runs entirely in your browser. Upload any audio or video, get AI-powered word-level captions synced to audio, style them with animated text effects, and export as MP4. No watermarks, complete privacy.
Yes. VideoCaptions.AI is 100% free with no watermark on exports. There is no premium tier, no per-export charge, and no branding added to your videos. The tool runs on your device, so there are no server costs to offset. Export as many videos as you want — always clean, always free.
Upload your video to VideoCaptions.AI, the AI transcribes audio with word-level timestamps, style your captions with animated effects, and export as MP4. The entire process takes under 3 minutes and runs in your browser.
Yes. Everything runs locally in your browser — your audio and video never leave your device. No servers, no uploads to the cloud. Even the AI transcription happens on your machine using WebAssembly. This is the most private caption generator available.
Audio: MP3, WAV, M4A. Video: MP4, MOV, WebM. You can also import a transcript JSON if you've already transcribed elsewhere. The tool uses your browser's native media decoders, so any format your browser can play will work.
Create an account in seconds to get started. Your projects save automatically so you can pick up where you left off. No credit card required.
Our AI transcription supports 99+ languages including English, Hindi, Hinglish, Spanish, Arabic, French, German, Japanese, Korean, Mandarin, Portuguese, and many more. English has the highest accuracy, with major world languages performing well. Hinglish (Hindi-English mix) is well-supported for Indian creators.
Chrome and Edge (version 120+) work perfectly. Firefox has limited support for in-browser transcription. Safari support is coming soon. Use a desktop or laptop for the best experience.
Multiple animation effects including fade, scale, bounce, glitch, neon pulse, typewriter, flip, wave, scramble, and more. Plus caption categories: Flash (bold statement), Build (word-by-word reveal), Pop (one word at a time), and Karaoke (highlight synced to audio).
Absolutely. Export at 9:16 aspect ratio (1080x1920) for Instagram Reels, TikTok, and YouTube Shorts. The MP4 exports with captions burned in — upload directly to any platform. Bold sans-serif fonts with flash or karaoke effects work best for short-form social video.
VideoCaptions.AI runs entirely in your browser — your files never leave your device. CapCut and Descript require cloud uploads. We offer animated caption effects synced to audio (vs basic subtitles), and there is no watermark and no monthly fee. See our detailed comparisons for a full feature breakdown.
A clean MP4 video with your styled, animated captions composited directly into the video frames (burned in). Choose from Quick Preview, Standard HD (1080p), or 4K resolution. The file is H.264 codec in MP4 container — universally compatible with every platform and device.