Join two subtitle files end-to-end — timestamps auto-adjusted.
Upload two SRT or VTT files and merge them into one. File B timestamps are automatically shifted to follow the end of file A with a configurable gap — no manual editing required.
Subtitle Merger
FREEFile A
Drop .srt or .vtt here
File B
Timestamps auto-offset after A
Skip the merge. Generate one video.
Skip the merge. Lumigen produces a single video with one synced caption track — multi-part scripts, single output, ready to upload.
How Subtitle Merger works
Upload file A
The first subtitle file — sets the base timeline.
Upload file B
Its timestamps are shifted to start after file A ends.
Download the merged file
One file with both subtitle tracks, properly sequenced.
Everything you need to create
stunning videos.
From avatars and voiceovers to captions and exports — all in one place.
Tech Enthusiast
EN · JP
Outdoor Adventurer
EN · DE
Industry Consultant
ES · FR
Senior Executive
EN · ZH
AI Avatars
Choose from 50+ realistic AI avatars. Each speaks naturally with perfect lip-sync, available in 30+ languages.
Get started One tool. Every feature.
Zero learning curve.
Tell us a bit more (Optional)
Create a 60-second TikTok video about the most surprising facts about the Roman Empire, ending with a call to follow
AI Script Generator
Write or generate your video script automatically. Pick a style and let the AI do the rest — or edit it yourself.
Charlotte
Swedish, Female
Lily
British, Female
James
American, Male
50+ Unique Voices
Pick from male and female voices across 30+ languages. Preview any voice before generating.
Realistic AI Avatars
Choose from 50+ hyper-realistic avatars with perfect lip-sync. No green screen needed.
Select a style or pick a template
Video Styles & Templates
TikTok shorts, YouTube docs, product demos — all with dedicated templates optimized for each platform and format.
Anime
Neon
Pixar
Ghibli
Watercolor26+ AI Visual Styles
From cinematic realism to anime, neon, Ghibli, and pixel art — pick a style and every scene is generated to match it.
1920 × 1080
High-Quality — Forever Yours
Export crisp 1080p or 4K videos. Download once and keep forever — even if you cancel.
Works with every platform you use
Export optimized for every platform
Every video format, powered by AI.
From product demos to viral social ads — generate studio-quality videos for any use case in minutes, no editing skills required.
Product Demos
Turn features into 60-second videos that sell
TikTok Shorts
Viral-ready vertical videos that stop the scroll
YouTube Shorts
Short-form content that grows your channel fast
Social Ads
High-converting creatives for every platform
See what you can create.
TikTok stories, YouTube docs, product demos — all generated in under 5 minutes.
Rainy Night in Tokyo
AI Avatar Product Demo
Why Bitcoin Is Digital Gold
Rich Mindset Breakdown
Multi-Scene Showcase
Sync & Dance Duo