Free LAS and LAZ Point Cloud Viewer
Drop in a LAS, LAZ or COPC point cloud and orbit through it in 3D. It opens right here, on your device, with nothing to install and no account.
Open a point cloud
The file is read by your browser and stays on your device.
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Ready to send this to a client? Import it into a DataDelivery job and share it as a 3D point cloud in their browser.
Start FreeYour file is opened by your browser and never leaves your device. This page loads Google Analytics, which records anonymous usage events such as that a file was opened and its size range; it never receives the file, its name, location or contents.
What it opens, and its limits
| Item | In this viewer |
|---|---|
| Files | LAS and LAZ (.las or .laz), including COPC (.copc.laz), LAS versions 1.2 to 1.4. |
| Points shown | An even sample of up to 3 million points by default (1 million on phones and tablets), adjustable from 1 to 10 million. |
| Color | RGB color when the file has it, elevation, intensity, or classification (standard ASPRS classes). |
| Large files | Memory depends on the point budget, not the file size. A LAZ file takes about a minute per GB to read, with points appearing as it goes. LAZ files need a chunk table, which any current LAZ writer adds. A LAZ file without one may not open. |
| View | Orbit, zoom and pan in 3D, with a north arrow and the extent in the file's units. |
| Background map | None. The point cloud is shown on a plain background, so nothing about the area you are viewing is requested from a map service. |
| Import check | A quick check of the rules DataDelivery applies when you import the file. The final check runs when you import. |
Questions about the LAS and LAZ viewer
Is my file uploaded?
No. Your browser opens the file on your device and reads it piece by piece. The file never leaves your device. The page loads Google Analytics, which records anonymous events such as that a file was opened and its size range. It never receives the file, its name, location or contents.
What is the largest point cloud I can open?
There is no fixed size limit. The viewer shows an even sample of up to 3 million points by default, and you can raise it to 10 million, so the memory it uses depends on that point budget, not on the size of the file. Bigger files take longer to read. LAZ files need a chunk table, which any current LAZ writer adds. A LAZ file without one may not open.
Why does a large LAZ file take a while to open?
LAZ is compressed, so the viewer decompresses every point on your device to pick its sample. On a typical computer that takes about a minute per GB of LAZ. Points appear on screen while it reads, and the progress bar shows how far it has got. Uncompressed LAS files read faster.
What if no coordinate system is found?
The point cloud still opens, because the viewer draws it relative to its own extent. The import check marks it as failing, though: DataDelivery needs a spatial reference system in the file header. Export the point cloud again as LAS or LAZ with its coordinate system set.
Can I measure the point cloud here?
Not here. This viewer is for looking at your file. In DataDelivery you can measure distance, height, area and angle inside the point cloud, with measurements saved to the job. Figures are approximate.
Related
Open-source credits: this viewer is built with three.js (three, MIT) and laz-perf (Apache-2.0). Read the licences.