Trusted by 10,000+ creatorsTikTok caption generator
No account required. Start in seconds.
Caption your TikToks, ready to post
AutoSubtitles adds captions to TikTok videos automatically. It transcribes your clip with AI, applies viral-style animated captions, and exports a 9:16 MP4 ready to upload. No account needed to start.
Why creators choose AutoSubtitles
Total control over every caption
Customize every detail: fonts (upload your own with Pro), colors, outline, shadow, background, casing, spacing, alignment, position, and animation. Or start from 28 presets.
Renders in your browser, fast
No waiting to upload your video to a server and no render queue. It stays on your device and captions render right in your browser, so you get your captioned video in seconds.
Viral animated captions
Word-by-word animations and karaoke highlighting in bold, readable styles built for TikTok, Reels, and Shorts.
Export however you need
Download a captioned video with burned-in subtitles on any plan. With Pro, also export SRT, VTT, and TXT files to use anywhere.
Translate into 30+ languages
Translate your captions into 30+ languages with AI while keeping the timing intact.
Free to use, private
Use it free; a paid plan unlocks more. Your video file never leaves your device; only the audio is sent for transcription, then deleted.
Features
Viral caption styles
Bold, animated presets built for the way captions look on TikTok.
Karaoke highlighting
Highlight each word as it is spoken to boost retention.
Vertical-first
Export 9:16 video, with other aspect ratios available too.
Fast turnaround
Caption and export in minutes, all in the browser.
Made for TikTok creators, social teams, and repurposers.
TikTok creators
Caption every post so it lands with viewers watching on mute.
Social teams
Produce captioned TikToks at scale with a consistent style.
Repurposers
Turn long videos into captioned vertical clips for TikTok.
How it works
- Step 1
Upload your clip
Drop in your TikTok video, vertical or any aspect ratio.
- Step 2
Auto-caption
AI transcribes the audio into captions in seconds.
- Step 3
Style for TikTok
Pick a viral-style animated preset with word highlighting.
- Step 4
Export 9:16
Render a vertical MP4 with the captions burned in.
Free vs Pro
Start free, upgrade only if you need more.
| Capability | Free | Pro |
|---|---|---|
| Vertical 9:16 export | Yes | Yes |
| Viral animated captions | Yes | Yes |
| AI subtitle generation | Yes | Yes |
| Editable text and timing | Yes | Yes |
| Export captioned video | Yes | Yes |
| No watermark | No | Yes |
| HD and 4K export | No | Yes |
| AI translation | No | Yes |
| Custom fonts | No | Yes |
| SRT, VTT and TXT download | No | Yes |
| Saved style presets | No | Yes |
No account required. Start in seconds.
Frequently asked questions
- How do I add captions to a TikTok video?
Upload your clip to AutoSubtitles, let the AI generate captions, pick a viral-style preset, and export a 9:16 MP4 with the captions burned in, ready to post on TikTok.
- Are the TikTok captions animated?
Yes. You can apply animated presets with karaoke-style word highlighting, the look popular on TikTok. Animated styles are free to use.
- Is it free to caption TikToks?
Yes. Generating, editing, and exporting captions is free with no signup, including the viral animated styles. Free exports have a small watermark, which Pro removes.
- Does it export vertical video?
Yes. You can export 9:16 vertical video for TikTok, as well as other aspect ratios.