What is Frankenfile?

Frankenfile is an AI‑powered desktop application for macOS that automates common file tasks. It converts images between PNG, JPG, GIF, and other formats, resizes and crops them, and can overlay watermarks or generate thumbnails. The tool supports video conversion, clipping, resizing, and audio separation, as well as audio file conversion, trimming, compression, and track splitting.

PDF files can be split, merged, or converted to other formats. Frankenfile processes all files locally, so no data is uploaded to external services. The application serves photographers, videographers, graphic designers, and office users who need fast, reliable file manipulation without manual editing.

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Frankenfile's key features

AI-driven file automation
Image conversion and resizing
Video conversion and trimming
Audio conversion and trimming
PDF splitting, merging, converting
Local processing, no uploads
Watermark overlay and thumbnail generation

Frankenfile use cases

Convert a batch of RAW images to compressed JPEGs and apply a custom watermark for a client portfolio, all offline and keeping privacy.
Resize and crop marketing videos into multiple aspect ratios for social media platforms, editing directly on mac without internet.
Merge PDFs and split audio tracks for a corporate training package, ensuring files stay local and secure.