Press Kit

Everything you need to write about Seatbelt.

About Seatbelt

Short: Seatbelt is a native file transfer utility for Mac with built in verification and advanced queueing. It’s super fast, features persistent transfers that can be paused, and verifies a hash signature of every file. It also features ASC MHL support and searchable logs.

Long: Seatbelt is a native macOS file transfer utility for filmmakers, editors, DITs and anyone who moves a lot of data. Every file is verified with fast, industry-standard hashing, and every transfer is logged, searchable and exportable as a PDF report. Seatbelt is built around ASC MHL, the American Society of Cinematographers’ media hash list, so the chain of custody travels with the media. Transfers can be paused and resumed even across restarts, and with sequences you can copy to one fast drive and feed several backups off of that. Seatbelt is built entirely in Swift by an independent filmmaker and developer in Norway.

Fact sheet

  • Developer: Jarl Robert Kristiansen, independent developer, Norway
  • Platform: macOS 26 or newer. Built for macOS 26 and Apple’s current design, entirely in Swift (why)
  • Price: $49 one-time at launch. No subscription.
  • Availability: Public beta. Join the beta
  • Website: seatbeltapp.com

Key features

  • Checksum verification: every file hashed at source and destination (xxHash by default; MD5, SHA-1, SHA-256 and C4 also available)
  • ASC MHL: writes and extends ASC MHL histories, with a built-in history viewer
  • Persistent transfers: pause and resume, even across restarts, including partial checksums
  • Sequences: chain transfers from drive to drive, or fan out to several at once
  • Transfer logs: detailed, searchable logs and PDF reports
  • Shortcuts: recent drives and favorite destinations one click away

Assets

For screenshots, interviews or a review copy, email [email protected].