What you just got

You dropped an export from a fitness app into the converter, and a file called openbody.json landed in your downloads. Here’s what that file actually is — and why it’s worth keeping.

It’s just your history, written down plainly

openbody.json is a plain, human-readable file that lists your workouts and measurements — the runs, lifts, rides, climbs, heart-rate readings, and body measurements the converter found in your export. It isn’t an app, and it isn’t locked to anything. It’s text you can open, read, copy, and move around freely. Nothing about it depends on OpenBody, on the app you exported from, or on this website still being here tomorrow.

If you open it in any text editor, you’ll see readable entries — each one a workout or a measurement, with its date, what it was, and the numbers that go with it. A single reading looks about like this:

{ "type": "heart-rate", "value": 61, "unit": "bpm", "startTime": "2026-06-14T07:02:00Z" }

That’s the whole idea: no mystery format, no secret database. Just your data, laid out so a person (or any other tool) can read it.

Why a portable copy matters

Your training history usually lives inside one app — and that means it can move, change, or vanish on someone else’s terms. A portable copy is the opposite: it’s yours, sitting in a plain file you control. Apps come and go, subscriptions lapse, companies get acquired and shut things down. The copy you just downloaded outlives any single one of them.

What you can do with it now

Keep it as a backup Tuck openbody.json somewhere safe — a folder, a drive, cloud storage. It's a snapshot of your history that no app can take away.

Come back and top it up Export again later and re-import it here anytime — including this openbody.json itself — to pick up where you left off and merge in what's new.

Open and read it Double-click it into any text editor to see exactly what's inside. It's plain text, so there's nothing to install and nothing hidden.

Take it elsewhere It's an open format, so as more tools learn to read OpenBody, this same file can travel with you instead of starting over.

That's really all you need

For most people, the takeaway is simple: you now own a portable copy of your training history, and you can re-import it here whenever you want. Everything below is optional.

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Curious what’s actually inside? See the shape of the data → walks through real records — a measurement, a set, a run, a full session — in about five minutes. And if you want the exact, technical definition, the specification has every detail.