Generate SRT files from video
with AI.
Free SRT/VTT Generator — AI-powered, no signup
Upload video. AI transcribes and generates a perfectly-timed SRT or VTT subtitle file. Download instantly, free.
Drop your video here
or click to browse
Trndinn Auto Caption Generator adds trending caption styles to any video — Hormozi-style word-by-word reveals, MrBeast chunky highlights, and more. AI transcribes in 99+ languages.
Trndinn Auto Caption Generator is a free browser tool that adds auto-synced, styled captions to any short-form video in under 30 seconds. Upload a video (up to 1.5 minutes), pick a style (Hormozi, MrBeast, Minimal, Karaoke, Typewriter, Gradient Pop), and download the captioned MP4 — no login, no watermark, no software install.
Why captions matter
85%
of videos watched on mute
Verizon Digital Media, 2019
80%
higher engagement with captions
Facebook Business, 2016
12%
longer watch time
Facebook IQ, 2019
92%
watch mobile video silently
Verizon/Publicis, 2019
80% of people are more likely to watch a full video when captions are available [3PlayMedia, 2022]. Captions aren't just an accessibility feature — they're a growth lever.
6 trending caption styles
Each style is designed to match the aesthetic of top creators and maximize retention.
Hormozi
Bold, ALL CAPS, word-by-word yellow highlight
MrBeast
Chunky white + colored stroke, mixed case
Minimal
Clean light-weight, soft shadow, bottom-third
Karaoke
Full line visible, active word in color
Typewriter
Monospace, letter-by-letter reveal
Gradient Pop
Bold gradient text, bounce & scale pop
How Trndinn compares
| Feature | Trndinn | Kapwing | VEED | CapCut |
|---|---|---|---|---|
| Price | Free / $0.86/mo | $16/mo | $18/mo | Free (app only) |
| No login needed | ||||
| Web-based | ||||
| Word-level animation | ||||
| Social scheduling | Yes ($0.86/mo) |
Good questions, honest answers.
Supported formats
| Input | Limits | Output |
|---|---|---|
| MP4, MOV, WebM, AVI, MKV, M4V, 3GP, FLV | 1.5 min, 100 MB | MP4 (H.264 + AAC) |
| Any resolution | Max output 1080p | + SRT / VTT optional |
| 99+ languages | 2 videos / day free | 1-hour download window |
Fair use & copyright
This tool is for captioning your own content or content you have permission to use. Trndinn does not store uploaded videos beyond 1 hour. We are not affiliated with Instagram, TikTok, or YouTube. By using this tool you agree to our Terms of Service and DMCA policy.
Compare & Learn More
See how Trndinn's Auto Caption Generator stacks up against popular captioning tools, or browse our full comparison and alternatives hubs.
- Trndinn vs Submagic — free forever, unlimited minutes, and every animated caption style submagic charges for
- Trndinn vs Captions.ai — web-native, no app install, works on any device — with the same ai caption quality
- Trndinn vs Opus Clip — free captions and repurposing without the credits ceiling. same word-level accuracy, no monthly cap
- Trndinn vs VEED — no watermark on free exports, faster caption-only workflow, cleaner ui
- Trndinn vs CapCut — us-hosted, privacy-safe, browser-based — no bytedance in the loop
- All comparisons — full side-by-side breakdowns
- Caption tool alternatives hub — find the right fit
Ready for the upgrade?
Caption. Schedule.
Grow. Repeat.
Trndinn is what you upgrade to when captioning Reels stops being enough. Brand voice, AI writing, cross-platform scheduling — from $0.86/mo.