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CAPTIONS
THAT POP.

Auto-captions for TikTok, Reels & Shorts — word-level, free, and private. Style. Export. Done.

⚡ Start for free See how it works →

No account required  ·  Whisper AI runs in your browser  ·  Video never leaves your device

100%
Private
20+
Languages
$0
To start
15+
Animations
capflow.studio — Caption Studio
TikTok
Subtitle
Cinema
Fire
Rapid
Whisper Base · 98% accuracy
Whisper AI ✦
Word-level timestamps ✦
8 animations ✦
7 glow effects ✦
Zero uploads ✦
WebCodecs export ✦
720p · 1080p · 4K ✦
SRT · VTT · TXT ✦
Speaker colors ✦
Multi-language ✦
Whisper AI ✦
Word-level timestamps ✦
8 animations ✦
7 glow effects ✦
Zero uploads ✦
WebCodecs export ✦
720p · 1080p · 4K ✦
SRT · VTT · TXT ✦
Speaker colors ✦
Multi-language ✦
What's inside

EVERYTHING
YOU NEED

Built for creators who move fast. No servers, no queues, no account.

🎙️
Whisper AI Transcription
OpenAI's model runs entirely in your browser tab. Word-level timestamps. Accurate on noisy audio. Your file never leaves your device.
100% local
✨
Live Word Highlighting
Each word lights up exactly as it's spoken. Assign custom colors per word, per line, or per speaker.
your words light up as you speak
20+
Languages supported
English is free. Spanish, French, Japanese, Portuguese, German and 15+ more on Pro via Whisper multilingual.
⚡
17 Animations
Pop
Slide
Fade
Bounce
Glitch
Zoom
Flip
Shake
Elastic
Rise
Spin
Blur In
Cinematic
Typewriter
Karaoke
0¢
Server cost to you
Other tools charge per minute or per export. CAPFLOW runs on your device — no cloud bills, ever. Caption 1 video or 1,000.
No hidden limits
🔒
100% Private by Architecture
Your video never touches a server — not even ours. The AI model loads from our CDN the first time, then your browser caches it for faster subsequent runs. Export uses WebCodecs on your device. We literally cannot see your content.
🔒 Open DevTools → Network tab while using CAPFLOW. You'll see zero video upload requests. Your file never moves.
Zero-upload architecture
🎨
7 Glow Effects
Soft · Neon · Fire · Rainbow · Shadow · Chrome · None.
Neon
Fire
Rainbow
Chrome
The process

THREE STEPS.
DONE.

01
Step 01
Drop your video
MP4, MOV, or WebM. Up to 2 GB. Stays entirely on your device — no upload, no waiting room.
02
Step 02
Auto-transcribe
Whisper AI processes your audio locally and returns word-level timestamps. A 60s clip takes about 20 seconds.
03
Step 03
Style and export
Pick a preset, drag captions into position, tweak colors and animations, then export your burned-in video. Ready to post.
Plans

SIMPLE
PRICING

Start for free. Upgrade when you're ready.

Free
$0
forever
  • ✓Unlimited transcriptions
  • ✓12 animations free (Pop, Slide, Fade, Bounce & more)
  • ✓Soft glow & shadow effects
  • ✓Export SRT / VTT / TXT
  • ✓720p video export (30fps & 60fps)
  • –Non-English transcription
  • –1080p & 4K export
  • –Custom font upload
  • –No watermark
Get started free
Pro
$9/mo
billed monthly · cancel anytime
  • ✓Everything in Free
  • ✓20+ languages (Spanish, French, Japanese & more)
  • ✓All 8 animations & 7 glow effects
  • ✓1080p & 4K export
  • ✓Custom font upload (.ttf / .otf)
  • ✓No watermark on exports
  • ✓Saved style presets
  • –Batch processing (soon)
Get Pro — $9/mo
Team
$29/mo
up to 5 seats
  • ✓Everything in Pro
  • ✓Priority support
  • –5 team seats (soon)
  • –Shared style library (soon)
  • –Custom branding (soon)
  • –API access (soon)
Get Team — $29/mo
Feature CAPFLOW Free Most Competitors
Auto-captions✓ Free foreverPaid plan only
Video never leaves device✓ Always private✗ Uploaded to servers
Word-level highlights✓ FreePro / paid only
No account required✓ Never needed✗ Account required
17 caption animations✓ 12 free, 5 Pro✗ Paid only
Join early

BE FIRST.

CAPFLOW is brand new. Try it free, tell us what you think — and your review will be the first thing new visitors see.

Got questions

FAQ

Yes. CAPFLOW runs entirely in your browser using WebAssembly and WebCodecs. Your file is read locally and never sent anywhere. The Whisper AI model is fetched from our CDN and runs in your browser — your video never leaves your device.
Chrome 94+ and Edge 94+ are fully supported. These are required for WebCodecs video export. Transcription works on Firefox too. Safari support is in progress.
The first transcription fetches the Whisper AI model from our CDN. Your browser caches it for faster subsequent runs. Transcription runs at roughly 2–4× realtime on modern laptops — a 60-second clip takes 20–40 seconds depending on your device.
Yes — CAPFLOW supports 20+ languages on Pro via Whisper's multilingual model, including Spanish, French, German, Japanese, Portuguese, Arabic, Hindi, and more.
Free includes unlimited transcriptions, 12 animations, 720p export (30 and 60fps), and SRT/VTT/TXT — with a small watermark. Pro adds 20+ languages, 1080p/4K, all glow effects, custom fonts, saved presets, and removes the watermark.
Export runs on your device using WebCodecs — no server involved. Speed depends on your CPU and resolution. The Fast preset (720p/30fps) is recommended for most Shorts.
START NOW.
IT'S FREE.

No sign-up. No credit card. Open the studio and start creating in 30 seconds.

⚡ Open CAPFLOW Studio

Free forever · No account · Whisper AI

💬
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We read every message. Your feedback shapes what we build next.
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