Marcel Iseli

Marcel Iseli is an indie app developer and the creator of Batchio. He builds native macOS utilities focused on productivity and file management, with a focus on lightweight, subscription-free tools.

Why Did Marcel Build Batchio?

Batchio started because renaming files on Mac was harder than it needed to be. Finder only handles basic text replacement. Terminal requires memorizing arcane syntax. Existing batch renamers like Renamer ($24.99) and Name Mangler ($24.99) are powerful but feel overengineered for most workflows, and none of them show you results in real time as you build your rules.

Marcel wanted a batch renamer that makes the simple things instant and the complex things possible, with a live preview that updates on every keystroke. Batchio is the result: 9 composable rule types, regex with capture groups, EXIF and audio metadata support, conflict detection, and full undo. All built natively in Swift and SwiftUI.

What Makes Batchio Different?

Batchio is built with native Swift and SwiftUI, not Electron or web views. It requires macOS 13 (Ventura) or later and runs as a lightweight, sandboxed application. The free tier includes all 9 rule types with no feature gates on core functionality. The optional Pro upgrade ($4.99, one time) adds saved presets, folder automation, Finder Quick Action, and Shortcuts integration.

Every design decision follows the same philosophy: one time purchase, no subscriptions, no data collection, and respect for the user's time.

Other Mac Apps by Marcel

Marcel builds a suite of native macOS utilities, all following the same principles: lightweight, subscription free, and focused on doing one thing well.

Experience and Background

Marcel has been building apps for over a decade, with a focus on macOS and iOS development. He is passionate about building tools that are lightweight, focused, and respect the user's time and money. Every product he creates follows the same philosophy: one time purchase, no subscriptions, no data collection.