Frankenfile

Frankenfile is a Mac app that executes plain language instructions on your files: resize images, watermark video, split PDFs, trim audio and rename batches. Processing runs locally with no uploads, which makes it a fit for private or unreleased material.

Frankenfile is a Mac utility that turns plain language instructions into finished file operations. Instead of clicking through a menu for every resize, rename or conversion, you select the files you want to work on, type a sentence describing the outcome, and let the app carry it out. The examples shown on the site range from resizing images to a fixed edge, to turning photos into circular thumbnails, to dropping a watermark over the centre of a video clip. It covers the routine formats most people deal with. For images that means format conversion across png, jpg, gif and similar, resizing, cropping, watermark overlays and thumbnail generation. For video it handles conversion between mp4, mov and other containers, clipping and trimming, resizing, and pulling the audio out of a clip. Audio files can be converted between mp3 and wav, cut, compressed or split into separate tracks. PDFs can be split by page range, merged together or converted. Sorting and sequential renaming of batches also fall inside its scope. The working model suits people who already know what they want but not which tool does it: freelancers cleaning up client assets, office workers wrangling receipts and expense scans, editors preparing thumbnails, or anyone with a folder of mismatched files. Because processing happens on the machine and nothing is uploaded, it also appeals to users handling private documents or unreleased media who would rather not push files to a web service. The tradeoff is that it is a Mac only download, not a browser tool, so it does not travel across devices. Compared with general purpose AI chat tools that can describe a workflow but cannot touch your disk, Frankenfile is narrower but actually executes. Against classic batch utilities, it wins on flexibility for one-off jobs that would otherwise mean hunting for the right submenu or writing a shell command. It does not try to be a full digital asset manager or a cloud storage layer; it is a task runner for files you already have locally.