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<title>DiveJSON — an open dive-log interchange format</title>
<meta name="description" content="DiveJSON is an open JSON interchange format for scuba dive logs: full profiles from every computer worn, cylinders, trips, courses, sites, sightings, gear history, and certifications, portable between applications without loss.">
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  <h1>DiveJSON</h1>
  <p class="tagline">An open interchange format for scuba dive logs.</p>
  <span class="status">v1.0 draft — freezes when the reference round-trip passes</span>

  <p>One JSON document carries a complete logbook — dives with full sampled profiles from
  every computer worn, gas mixtures, trips, training courses, dive sites, marine-life
  sightings, gear and its service history, certifications — so a diver's data can move
  between applications without loss.
  Nothing invented: a value that was never recorded is absent, and no reader fabricates
  one. One canonical metric unit system. Times keep their UTC offsets. Every
  cross-reference resolves inside the document.</p>

<pre><code>{
  "format": "divejson",
  "version": "1.0",
  "exported_at": "2026-08-28T10:15:00+00:00",
  "diver": { "uuid": "019fec35-54b9-7874-a1c7-b504a3e8e778", "name": "Sam Reef" },
  "dives": [
    {
      "uuid": "019fec36-b9ec-71c6-a03e-64f59b8b92b1",
      "started_at": "2026-04-17T11:49:23+02:00",
      "duration": 2460,
      "max_depth": 18.4,
      "cylinders": [{ "volume": 12.0, "oxygen": 32.0, "start_pressure": 200.0 }],
      "recordings": [
        {
          "device": { "brand": "Suunto", "model": "Ocean" },
          "profile": { "duration": 2460000, "depth": { "times": [0, 60000, 120000], "values": [0, 950, 1840] } }
        }
      ]
    }
  ]
}</code></pre>

  <ul class="links">
    <li>📄 <a href="https://github.com/divejson/divejson/blob/main/spec/divejson.md">The specification</a></li>
    <li>🧩 <a href="/schema/1.0/divejson.schema.json">JSON Schema</a> (draft 2020-12)</li>
    <li>🛠️ <a href="https://github.com/divejson/divejson">Spec repository</a> — schema, conformance fixtures</li>
    <li>🐍 <a href="https://github.com/divejson/divejson-py">Python tools</a> — <code>divejson validate</code>, the converters, <code>divejson conform</code></li>
  </ul>

  <p>Media type <code>application/vnd.dive+json</code>, file extension
  <code>.divejson</code>.</p>

  <footer>Spec prose CC BY 4.0 · schema, fixtures &amp; tools MIT ·
  <a href="https://github.com/divejson">github.com/divejson</a></footer>
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