100% private — processing happens on your device, nothing is uploaded.
Works best with short clips (Reels, TikTok, Stories). Very large files may be slow on mobile.
By using this tool, you agree to our Terms of Use
Type your line, drag it on the preview, then burn it into an MP4.
Hooks and CTAs without opening CapCut—still 100% on-device.
Nothing is uploaded. Export runs locally with FFmpeg.wasm.
Short-form posts need a clear hook. Most online editors upload your file first.
Unvidio lets you place text on a live preview, then exports MP4 on your device.
Pair with trim or crop when you need a social-ready clip.
Only process files you own or may edit. Everything stays on your device.
Select a local MP4, MOV, WebM, or similar clip.
Enter your text, pick color/size, drag it on the preview.
Click Add text, wait for progress, then download the MP4.
Keep lines short (under ~6 words). Place text in the safe zone—away from TikTok UI edges. White with a soft shadow reads best on busy footage.
Private browser editing only—Unvidio does not store your videos.
A text overlay burns titles, captions-lite, or CTAs into the picture so they travel with the file.
This tool is for a short title/CTA you place manually.
Word-by-word auto captions are a separate Phase 2 feature coming next.
Prefer high contrast (white/black). Large size (L) for vertical 9:16 hooks.
FAQ
Quick answers to the most common questions about this tool.
Yes. No account and no upload quota.
No. Processing is local on your device.
Yes—drag it on the preview before exporting.
One overlay per export for now. Run again on the result to stack another line.
MP4 (H.264 + AAC).
Basic Latin works best. Complex emoji may not render in the burn-in.
About 200 MB is recommended.
Trim, crop, and merge are on the Tools page.