AI transcription with Whisper
Captionly runs OpenAI Whisper directly in your browser. 99+ languages, automatic detection, near-broadcast accuracy on clean audio.
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Built for TikTok creators · No watermark
Free TikTok subtitle generator
Drop your clip and Captionly transcribes it with AI, applies a TikTok-ready caption style (Neon, Karaoke, Bounce, Pill, Rainbow…) and lets you download the burned-in MP4. 100% in your browser. No watermark. No signup.
TikTok rewards short, hooky videos with on-screen text. Captions tell the platform what your video is about, keep silent viewers watching to the end, and push your retention up — which is what the For You algorithm actually optimises for. Captionly is a free TikTok caption generator that does all of it in seconds, without uploading your video to anyone's server.
Free AI subtitle generator — drop a video to get started
Drop your video here
or click to browse your files
Supports MP4, MOV, AVI, WebM (max 500MB)
100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved
✦ Everything you need for TikTok captions
Everything you need for TikTok captions
Built for the way TikTok creators actually edit — fast, mobile-first, no friction.
TikTok-ready caption styles
12 viral styles preset — Neon Pop, Karaoke, Bounce, Rainbow, Pill, Box Highlight and more. Pick one, tweak it, ship it.
No watermark, no signup, no quota
We don't add a watermark, ask for an email, or cap how many videos you can caption. Free forever, no upsell.
Click any word to edit
Whisper misheard a slang word? Click the wrong word, type the right one, the timing stays intact. Edits propagate to the burned-in video automatically.
Burn into MP4 or export SRT
Download a finished MP4 with captions burned in, or grab the .srt file to drop into CapCut, Premiere, or TikTok's own caption uploader.
Runs entirely in your browser
Your video never leaves your device. There's no server upload, no queue, no rate limit, and your raw footage stays private.
✦ ShowcaseReal videos.
Real videos.
Real captions.
See how creators of every kind are using Captionly. Drag to browse, click to play.
EN0:42
Neon Pop
thischangedmylife
EN1:18
Box Highlight
andthat'swhenIquit
EN0:21
Gradient Wave
onemorerep!
EN2:04
Karaoke
Tokyoatgoldenhour
EN0:56
Bounce
bestadviceever
ES0:33
Outline
novasacreer
EN0:28
Shadow Pop
let'sgo!victory
EN1:45
Underline
watchthistrick
EN0:52
Glitch
thisisinsane
EN0:38
Minimal
feelthebeat
EN0:19
Rainbow
hitthatmove
EN0:47
Pill
waitforit
✦ FAQ
TikTok subtitles — questions creators actually ask
Quick answers to the things people ask before captioning their next TikTok with Captionly.
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Free · No watermark · No signup
Make your next TikTok pop
Drop a clip, pick a style, ship the captioned MP4. The fastest way from raw footage to a captioned TikTok — built for creators who care about retention.