30.0 mm
spine width (1.18 inches)

Paper Types (click to use)

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About Spine Width

Spine Width is a free, browser-based utility designed to make this task as quick and frictionless as possible. Built to be the kind of tool you bookmark and use weekly: no surprises between visits, no degraded free tier, and a UI that gets out of the way. It pairs naturally with the other utility utilities here when you need to chain a quick workflow.

When you'd reach for Spine Width

  • 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.

  • 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.

Frequently asked about Spine Width

Is Spine Width really free?
Yes — Spine Width 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 Spine Width?
Spine Width processes everything in your browser using local APIs. Your files never leave your device.
Do I need to create an account to use Spine Width?
No. Spine Width works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
Does Spine Width work on mobile?
Yes, Spine Width is fully responsive and tested on iOS Safari and Android Chrome.
Can I use Spine Width commercially?
Yes. The output of Spine Width belongs entirely to you, with no licensing restrictions.

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