What is offline video editing?
Two different answers, depending on who is asking. To an editor who trained in a post house, offline editing means cutting with low-resolution proxies and conforming to the real media later. To almost everyone searching for it in 2026, it means software that works with the internet turned off — no upload, no account, no server. This page covers both, because the two have quietly merged.
The original meaning: offline and online
When editing systems couldn't handle full-quality footage in real time, you made small low-bitrate copies — proxies — and cut those. That stage was the offline edit, so named because it happened away from the expensive online suite. When the cut was locked, an online session relinked the edit decisions to the original media and did colour and finishing at full quality.
The hardware reason for that split is largely gone; a modern Mac cuts 4K natively. The workflow survives anyway, because proxies are still the fastest way to work with heavy formats, and because it is genuinely useful to separate "what is the cut" from "what does it look like".
Crisp's export path is a direct descendant of it. You edit against fast, manageable media and the upscale runs once at export, applied to the finished cut. Running an AI upscaler live on every preview frame would make scrubbing unusable, and you'd be spending compute on frames that end up on the cutting-room floor.
The current meaning: it runs on your machine
The word got reused because the thing it now describes became worth naming. A large share of video tools shipped since roughly 2020 are web apps: you upload footage, a server processes it, you download the result. That model has real advantages — nothing to install, any device, and access to models far bigger than a laptop can hold.
It also means your footage is on someone else's computer. For a lot of work nobody cares. For some work it is disqualifying, and the list is longer than people expect:
- Anything under NDA, which is most commercial and corporate work.
- Legal, medical, insurance and investigative footage.
- Interior walkthroughs of a client's home — real-estate video is the inside of somebody's house, and they did not agree to it being uploaded anywhere.
- Family archives. No breach policy is worth a stranger's access to your childhood.
- Anything you'd have to check a retention policy before uploading. If you have to check, that is the answer.
Where offline actually loses
Two places, honestly. Collaboration is the first: if three people need to review a cut from three cities, a cloud tool with shared timelines and comment threads is simply the right choice, and Frame.io or a web editor will beat a local app at it. The second is model size — a data centre can load a model that will not fit in 16GB of unified memory, and for the hardest generative tasks that gap shows.
What has changed is that for the specific job of upscaling and cleanup, Apple Silicon closed most of the gap. The models that do this well are a few hundred megabytes and run on the GPU that is already in the machine. Crisp's heaviest mode runs in about 11GB of peak memory, which is why it works on a 16GB MacBook Air rather than requiring a workstation.
How to tell whether a tool is genuinely offline
Marketing copy says "local" fairly freely. Two checks settle it in under a minute:
- Turn off Wi-Fi and use it. Not just launch it — actually run the AI feature end to end. Plenty of "local" apps do the editing locally and quietly send the enhance job to a server. If the feature fails offline, it was never local.
- Watch the network. macOS's Activity Monitor has a Network tab. Run an export and see whether hundreds of megabytes leave the machine. Licence checks and update pings are small and expected; your footage is not small.
A related tell: if the tool requires an account before it will process anything, the processing is probably not on your machine. Local software has no reason to know who you are.
The practical position
Offline is not a philosophy, it is a constraint you either have or don't. If you edit holiday clips and the convenience of a browser tool suits you, use one. If you handle other people's footage, the question of where it goes is part of the job, and the simplest defensible answer is that it never went anywhere.