AI Auto Caption
Generator for Viral Videos.
Automatically add captions to TikToks, Reels, and YouTube Shorts. Generate, style, and export professional subtitles with an advanced AI editor built for creators.
Add Auto Captions to Video for TikTok, Reels & Shorts
CaptionCraft is the premium browser editor combining high-accuracy AI speech-to-text, frame-precise caption alignment, and creator style cloning.
AI Caption Generation
Word-level transcripts with speaker diarization and punctuation. Whisper-grade accuracy in seconds.
Interactive Timeline Editor
Drag caption blocks frame-by-frame. Zoom to milliseconds. Live preview matches the burned-in result.
Style Cloner
Drop a reference clip — AI rebuilds the exact font, color, glow, and motion in one click.
Caption Templates
20+ creator-tested templates — TikTok pop, MrBeast bold, podcast clean, and more.
TikTok & Reels Export
Render 9:16 with burned-in captions, or export SRT/VTT/JSON to your favorite NLE.
Fast Rendering
GPU-accelerated burn-in. 60-second clip exports in under 20 seconds — all in the browser.
Designed like an NLE. Feels like a browser app.
Frame-precise editing without leaving the browser
Every caption block, every word, every millisecond. Drag to retime, double-click to edit, snap to onsets — all with sub-frame accuracy.
- Word-level drag handles
- Snap to audio onsets
- Multi-track speaker view
- Real-time waveform
What you see is what you export
Live caption overlay matches the burned-in MP4 pixel for pixel. No surprises after render.
- 360° drag positioning
- Per-word active highlight
- Speaker color coding
- 9:16, 1:1, 16:9 canvas
Steal any viral style — legally
Drop a reference clip. Our model samples 12 frames, reads font weight, color, glow, background blur, and motion easing, then rebuilds it in your project.
- 12-frame style analysis
- Auto font + weight match
- Glow + shadow extraction
- Motion easing detection
Ship to TikTok, Reels, or your editor
Burn-in MP4 in 9:16, 1:1, or 16:9. Or export SRT, VTT, JSON, plain text — whatever your workflow needs.
- GPU-accelerated render
- Custom opening frame
- SRT · VTT · JSON · TXT
- One-click TikTok slides
Loved by creators who ship daily
From solo TikTokers to agency editors — CaptionCraft cuts hours off every post.
"I used to spend an hour per video on captions. CaptionCraft cuts that to two minutes — and the highlights look better than anything I made by hand."
"The Style Cloner is unreal. I dropped in a viral reel and it rebuilt the exact font + glow in seconds. Game over."
"Multi-speaker diarization saved a whole podcast project. Color-coded lines, zero manual cleanup. My team ships 3× faster now."
Production-grade infrastructure under the hood
Secure Authentication
OAuth + session-backed accounts with httpOnly tokens. SSO-ready.
Cloud Project Storage
Every project synced. Pick up on any device, never lose work.
Fast AI Processing
Edge-deployed transcription with sub-second cold starts.
Early Access Program
Lifetime priority for beta users when paid plans launch.
Everything you need to know
Have questions about CaptionCraft? We've got you covered with all the answers.
Simply upload your video (MP4, WebM, or MOV) directly to CaptionCraft. Our Whisper-grade AI automatically transcribes your speech with 99% accuracy in seconds. From there, you can style, edit, and burn in viral captions perfect for TikTok, Reels, and Shorts.
Yes! CaptionCraft includes an industry-first AI Style Cloner. Simply upload a reference clip of any creator's video, and our model extracts and applies the identical font weight, outline thickness, highlights, and animations to your project in one click.
Yes! CaptionCraft features multi-speaker diarization that automatically identifies and groups distinct voices. You can customize caption colors, positions, and active timing on a per-speaker basis to keep interviews and podcasts visually distinct.
You can export high-quality 9:16 videos with burned-in captions directly, or download standard subtitle files including SRT, VTT, and detailed JSON word-level timings to import into Premiere Pro, Final Cut, or DaVinci Resolve.
Yes, CaptionCraft is completely free to start during our beta launch. No credit card is required, and all editing, styling, and rendering happen directly in your web browser.
Your next viral post,
one drop away.
Start free — open the editor with a sample project, no signup required.