270 CFM required

Room volume: 2,700 cu ft

L/s: 127

Typical ACH by space:

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About Air Changes

Air Changes was built for the moment you just need to handle this task and move on — no signup, no upload to a third-party server. The goal was to keep the path from "open the page" to "get the result" as short as possible. No mandatory account, no cookie wall, no upsell at every step. Like everything else in the utility collection, it is free, ad-light, and works on mobile as well as desktop.

When you'd reach for Air Changes

  • You need to handle a one-off task right before a meeting and don't have time to install anything.

    Anyone working remotely on a borrowed or restricted machine.

    Open the page, get the result, paste it into your doc — under a minute.

  • You're cleaning up a folder of files that accumulated over a project and need to standardize them.

    Designers, writers, and developers wrapping up deliverables.

    Drop each file in, copy the output, move on.

  • You're on a public or shared machine and don't want to leave traces of what you're working on.

    Travelers, contractors, anyone working from a friend's computer.

    Nothing is uploaded, nothing persists if you're not signed in.

  • You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.

    Marketers and ops people whose primary tool is metered.

    Stay productive without burning credits.

Frequently asked about Air Changes

What browsers does Air Changes support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
Is Air Changes really free?
Yes — Air Changes is free for unlimited personal use, with no account required and no watermark on the output.
Are my files uploaded to a server when I use Air Changes?
Air Changes processes everything in your browser using local APIs. Your files never leave your device.
Can I use Air Changes commercially?
Yes. The output of Air Changes belongs entirely to you, with no licensing restrictions.
Will Air Changes change my original file?
Never. Air Changes only reads your input file and produces a new output file.

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