01~5 seconds
Drop in your clip.
MP4, MOV or WebM up to 1 GB, vertical or wide. Your browser pulls out the audio and sends only that, about 1 MB a minute, for transcription. The video stays on your device.
Word-by-word captions·No watermark·Free to start
Captions that light up as you speak.
Drop in a clip and get captions timed to every word. Fix any misheard word, pick a style and download an MP4 for TikTok, Reels, Shorts or YouTube. It all happens in your browser, and the video never leaves your device.
Caption a video
2 free clips · no account · no card
How it works
02~30 seconds
Fix and style.
Captions come back on a timeline, one word at a time. Correct a word, drag a caption to retime it, pick a preset, then change the font, color, glow or motion. Any single word can have its own size and color.
03≈ clip length
Export and post.
Download an MP4 with the captions burned in, at your video’s original size, ready for TikTok, Reels, Shorts or YouTube. Or take .srt and .vtt files for YouTube and other players.
Inside the studio
Timeline
Fix timing on a timeline.
Captions sit on top of the audio waveform, so you can see where each word starts. Drag a caption to move it, split it at the playhead, or trim its edges.
- Drag, split, merge and trim captions against the waveform.
- Show whole phrases, or one word at a time.
- Zoom in for small timing fixes. Every edit can be undone.
Styling
Start from a preset, then change it.
Presets give you a finished look in one click. From there, change the font, color, outline and glow, or switch to a glass or metallic finish. Apply a style to every caption, or only to the one you selected.
- Presets for a finished look in one click.
- 16 fonts, any color, outline, glow, glass and metallic.
- Make one word bigger, or give it its own color or glow.
Motion
Words appear as they’re spoken.
Each word can pop, slide up or blur in at the moment it is said. The current word is highlighted in color or sits inside a pill, so viewers can follow along with the sound off.
- Motion: fade, slide up, pop, zoom in, blur rise and blur grow.
- Word or pill highlight, timed to the speaker.
- The MP4 looks the same as the preview.
What you get
Timed to each word
Whisper returns a start and end time for every word, so the highlight lands on the word as it is spoken. You never nudge captions into sync by hand.
The export matches the preview
The same renderer draws the preview and the exported MP4. Fonts, glow and position come out as you set them.
Change any single word
Start from a preset or set your own look with 16 fonts, outline, glow and glass or metallic finishes. Then make one word bigger, or a different color, without touching the rest of the line.
Vertical or wide
The MP4 keeps your video’s original size, so a 9:16 Reel stays 9:16 and a 16:9 YouTube video stays 16:9. You can also download .srt and .vtt files.
Free exports have no watermark
Captioning, styling and MP4 export all work on the free plan, and nothing gets stamped with our logo. Paid plans only add minutes.
Exports on your computer
Your browser encodes the MP4 with WebCodecs and copies the audio across untouched. An export takes roughly as long as the clip, and the video never leaves your device.
Pricing
Start free. Pay when you post more.
Sign in with Google for 5 free minutes every month, no card. Pro is $5 a month for 100 minutes, and Creator is $15 for 600. Paying yearly gets you 2 months free, and you can cancel any time.
Pro
$50per year
About 3 minutes of video a day.
- 100 minutes of audio a month
- 5 cents a minute on the monthly plan
- Clips longer than 5 minutes
- .srt, .vtt and MP4 export
- Cancel any time
Creator
$150per year
About 20 minutes of video a day.
- 600 minutes of audio a month
- 2.5 cents a minute on the monthly plan
- Clips longer than 5 minutes
- .srt, .vtt and MP4 export
- Cancel any time
Guides
- GuideCapCut auto captions are not free anymore: what changed and what to doFree CapCut accounts now hit an upgrade prompt on auto captions. What changed, why the cap is hard to pin down, and the cheapest ways to keep captioning.
- GuideAre your videos private? How browser-based captioning worksMany caption tools upload your whole video to a server. Browser-based captioning keeps the footage on your device. How it works, and how to check a tool.
- GuideBest free caption apps in 2026 (and their catches)Free caption apps for YouTube, Shorts, TikTok and Reels, compared on watermark, video upload and free limit. YouTube Studio is the free pick for long videos.
- Platform guideAdd captions to a TikTok in your browserAdd word-by-word captions to a TikTok in your browser. Fix any word, keep the text clear of TikTok's buttons and export an MP4. 2 clips free.
- Platform guideAdd captions to Instagram ReelsAdd animated captions to Instagram Reels in your browser. Use your brand colors, keep the text clear of the Reels overlay and export an MP4. Free to start.
- Platform guideAdd captions to YouTube ShortsAdd word-by-word captions to YouTube Shorts in your browser. Line up the first caption with your hook, then export a burned-in MP4. Free to start.
FAQ
- Do I need an account?
- No. Your first 2 clips of up to 60 seconds need no account. After that, sign in with Google for 5 free minutes every month. We never ask for a card on the free plan.
- Is my video uploaded to a server?
- No. The video stays in your browser. We send only the audio track, about 1 MB a minute, to our transcription provider, and we do not store it once the captions come back.
- Is there a watermark?
- No. Free and paid exports are the same file, with no logo on it.
- Which languages does it understand?
- Most widely spoken languages. The Whisper model detects the language on its own, so there is nothing to set. Accuracy drops on rarer languages, heavy accents and music under speech, so read through the captions before you export.
- How do I fix a wrong word or bad timing?
- Click the caption on the timeline and type the correction. Drag its edges to retime it, or split and merge captions at the playhead. Styling works the same way: 16 fonts, presets, outline, glow and motion.
- Which videos can I use?
- MP4, MOV or WebM up to 1 GB, vertical or wide. The exported MP4 keeps the original size, so it posts to TikTok, Reels, Shorts or YouTube without cropping.
- What are burned-in captions?
- Text drawn into every frame of the video, so it shows on any app or player and viewers cannot turn it off. ReelCaption exports burned-in captions in the MP4. For captions viewers can switch off, download an .srt or .vtt subtitle file instead.
- Does it work on my phone?
- The studio runs in any modern browser. MP4 export needs Chrome, Edge or Safari. In other browsers you can still download .srt and .vtt subtitle files.
- What happens when my free minutes run out?
- Your captions stay in the studio and you can still export them. New clips wait until your minutes reset on the 1st of the month, or you can upgrade: Pro is $5 a month for 100 minutes and Creator is $15 a month for 600.
- Can I cancel?
- Yes, from the billing page in your account, in a couple of clicks. You keep your minutes until the end of the period you paid for.
Caption your next clip in a couple of minutes.
Your first 2 clips need no account. After that, 5 minutes a month are free with Google sign-in, and Pro is $5 a month.