Video merger that joins clipswithout an upload
Give Shorz a list of clips and it writes them into one file, in order, on your own disk. Then fade between them, score them and caption them without ever opening another app.
How to use the video merger in three steps
Joining clips is the most basic operation in video and still the most annoying one online: upload each file, wait, hope the encoder matches, accept a watermark. Locally it's instant. And because Shorz is a full editor rather than a converter, the merged file can come out already faded, scored and captioned.
List the clips in order
Point Shorz at the files you want joined and the order you want them in. It handles the concatenation and writes one continuous output.
Your order, one output
Smooth the joins
Add fades between sections, or run the merged file through a transition pass so the cuts feel intentional instead of abrupt.
Fades & transitions
Finish it as one video
Once it's one file it's one project: caption the whole thing, put music under it, grade it, add a border, and export for whichever platform you're posting to.
One project, one export
Find it in the app under MCP single-file tool · in-project: scenes and B-roll.
Why Video Merger in Shorz
Merging as part of a real edit
Every Shorz project already assembles clips — scenes in Text-to-Video, B-roll inserts, clipped highlights. Merging is the same machinery exposed on its own, so a joined file behaves like anything else you build here.
Editor-grade
Batch it from one sentence
Ask your AI assistant to join every clip in a folder, in filename order, with a one-second fade between each. Over MCP that's a single instruction rather than fifty drag-and-drops.
Agent-drivable
Who uses it, and for what
Multi-take edits
Join the good takes into one cut.
Compilations
Stitch a series into a single upload.
Intro + body + outro
Reuse the same top and tail every time.
Generated sequences
Chain AI clips into a longer scene.
Shorz speaks MCP
Shorz isn't a locked web app. Connect it to Claude, Cursor, Codex or Gemini and your assistant can drive it directly — one message instead of a panel full of clicks. You review before anything is published.
See how MCP automation works
You say
“Join intro.mp4, main.mp4 and outro.mp4 into one file with a half-second fade between each.”
Shorz does
- 1Read each clip's properties
- 2Apply fades at the joins
- 3Concatenate in order
- 4Write the merged file
Every tool ships with the same promises
They're not separate products with separate bills. One app, one credit balance, one export that belongs to you.
- No subscription — prepaid credits that never expire
- No watermark on anything you export, ever
- Full commercial rights on what you create
- A desktop app for Windows and Mac — your files stay on your machine
- Auto Edit and Clipping: 4 free videos a week, no card
- Drivable from Claude, Cursor, Codex or Gemini over MCP
Video Merger questions
As many as you like — you supply the list of files and the order, and Shorz writes them into a single output.
Shorz re-encodes to a single consistent output. If sizes differ wildly, resize or fit-to-aspect the clips first so the framing is what you expect.
No. Merging runs on your own machine, so there's no upload, no queue and no file-size ceiling.
Concatenation is one of Shorz's single-file tools, driven over MCP — ask the AI assistant you've connected to Shorz and it runs the join for you.
Still have questions? Ask founder
More Shorz tools
Video Trimmer
Give it a start and an end and get that range back as a new file.
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Video Resizer
Scale to exact dimensions, or fit into a target frame with letterbox bars in whatever colour you want.
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Video Speed Changer
Ten times slower for a detail nobody would otherwise catch, four times faster for a process nobody wants to sit through.
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AI Music Generator
Describe the track — genre, mood, tempo, instruments — and Shorz writes it with ElevenLabs Music or Google Lyria 2.
Explore
Join your clips into one video
Any number of files, in the order you choose, on your own machine — then fade the seams, score it and caption it without switching apps.
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