Free tool
Read any LAS or LAZ file header, online
Drop a point cloud and read its metadata instantly: LAS version, point count, EPSG coordinate system, extent, density and classification breakdown. Everything lasinfo tells you, without installing anything. No sign-up, no upload, no size limit.
Your file never leaves your computer. Everything runs in your browser.
Drop a .las or .laz file here
Only the file header is read, so even a multi-gigabyte file reports in a second.
What the inspector tells you
A LAS or LAZ header carries everything you need to know before processing a point cloud, and most of it is invisible until you open the file in heavy desktop software.
Format and version
LAS version, point data record format, whether the file is compressed, and which fields each point carries (GPS time, RGB colour, near infrared).
Coordinate system
The EPSG code or WKT name stored in the file, so you know how it will line up with your other data before you start.
Extent and area
Bounding box in the file's own units, plus the area it covers and the average point density.
Classification breakdown
For uncompressed LAS, a sampled histogram of ASPRS classes so you can see at a glance whether ground, vegetation or buildings are already classified.
Everything lasinfo reports, in a browser tab
Reading a LAS header normally means installing LAStools and running lasinfo at the command line, or writing a few lines of laspy or PDAL. That is a lot of setup for one question: what is actually in this file?
This page reads the same public header block and variable length records that those tools read, directly in your browser. You get the version, point data record format, point count, scale and offset, bounding box, the EPSG code from the georeferencing records, and a classification breakdown, without a terminal, a Python environment or an upload.
Common questions
Is my file uploaded anywhere?
No. The inspector reads the file directly in your browser using the local File API. Nothing is sent to a server, which is why it works on files of any size and on data you cannot share.
Why is it instant on a huge file?
All the metadata lives in the first few kilobytes of the file, so only that part is read. The classification histogram samples point records, rather than reading every point.
Why is there no class histogram for LAZ files?
LAZ is compressed. The header and coordinate system are stored uncompressed and read normally, but individual point records need decompression, so the class breakdown is available for uncompressed LAS files only.
Can I view the actual point cloud?
Yes. Use the online LAS file viewer or the point cloud viewer to see the data in 3D in your browser.
What if the file has no coordinate system?
Plenty of files ship without georeferencing VLRs. The inspector will say so, which is useful in itself: it usually means the CRS has to be supplied manually further down the workflow.
How do I check which EPSG code a LAS file uses?
Drop the file above. The EPSG code is read from the file's georeferencing records, either the GeoTIFF keys or the WKT string, and shown under Coordinate system along with whether it is projected or geographic.
How many points does my LAS file contain?
The point count is stored in the header, so it appears immediately, along with the area the file covers and the average point density per square metre.
Does it work with LAS 1.4?
Yes. LAS 1.0 through 1.4 are supported, including the 64-bit point count and point data record formats 6 to 10 introduced in 1.4.
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