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Offline video tool for promos

Make promos and social clips offline: timeline, captions and export presets.

Coming soon

Affordable premium, offline-first software. Local-first; no subscription trap. Culltron Max and Ultra X27 (Ultra X27 generation). Affiliate disclosure.

What this covers

A promo needs a cut, captions and a thumbnail. Video Max and Studio Max produce all three on your own machine.

The Culltron tools for this job

Video Max

A local-first, multi-track video editor.

  • A media bin, Program monitor, inspector, caption lanes and timeline that stay usable from a 390 px phone browser up to wide desktop layouts.
  • Split, duplicate, delete, mute or lock tracks, and drag and trim clips. The last 50 changes can be undone and redone.
  • Rendering to MP4, WebM, MP3 or GIF on your own machine with a compatible ffmpeg installation you supply. Without it, an in-browser WebM render is available for previews.
  • Six templates.
  • On-device caption search, reflow that wraps captions at 20–60 characters per line, and up to 100 speaker labels.
  • Optional local transcription with whisper.cpp, with up to 1,000 characters of custom vocabulary that is never stored.

Limits: Video Max does not include or silently call an automatic translation service. Translations are imported and reviewed. Server-grade rendering is planned for the future.

Studio Max

A layered design studio for flyers, menus, social posts and brand material. It is an original app, not a clone of Canva or Adobe.

  • Text, shapes, lines, polygons and images as movable, resizable layers, each with its own opacity and blend mode.
  • 13 original templates and brand kits. Applying a kit saves its palette and font roles into the design.
  • Brand preflight that flags text and vector layers that drift from the saved palette or fonts.
  • Non-destructive masks (rectangle, ellipse and 3–64-point polygon) with feathering, invert, and add, subtract and intersect operations.
  • Non-destructive image adjustments (blur, greyscale, brightness, contrast, saturation, sepia, invert and hue rotation) and source cropping.
  • PNG and SVG export that renders the same way as the canvas.

Limits: Arbitrary pixel or colour-based selection and edge-refinement tools are not claimed. Brand preflight produces review findings, not automatic brand approval.

Who it is for

How it works

  1. Each Max app is a separate desktop product built on Culltron's shared, hardened platform.
  2. Files and records stay in a local folder on your machine, and the core tools work offline.
  3. A signed licence lease unlocks the paid edition. Ultra X27 adds advanced features that the server enforces.
  4. When you change a file, the app writes a new copy, often with a checksum receipt, instead of silently overwriting your original.

Frequently asked questions

What formats can I export?

MP4, WebM, MP3 and GIF with a compatible local ffmpeg. Without it, an in-browser WebM render is available for previews.

Can it caption automatically?

Optionally, with local whisper.cpp transcription. You can then search, reflow and label speakers in the captions.

Does it translate captions?

It imports translations and checks them against the source captions. It does not call a translation service itself.

Can I undo mistakes?

Yes, the last 50 timeline changes, plus named version history.

Release status: built and tested in the repository. A public download appears only after signing, checksum verification and release approval; see Downloads.