Loading Python runtime
Installing surfalize
Preparing environment
Ready
Initialising…
!
Python error

      

    

    

      
    

  







  

  

    
ISO 25178 · Surface Metrology

    
Surface analysis,
in the browser.

    
Full topography analysis powered by surfalize — running entirely client-side via WebAssembly. No server. No installation. No data leaves your machine.

    

      
      Read documentation
    

    

      
StandardISO 25178

      
RuntimePyodide / WASM

      
LicenseOpen source

      
Data100% local

    

  


  


  

    
Capabilities

    

      

        
01

        
        
Interactive visualisation

        
False-colour height maps, interactive 3D surface rendering, power spectral density and Abbott–Firestone curves — all rendered with Plotly.

      

      

        
02

        
        
Batch processing

        
Analyse dozens of files in one run. Configure a preprocessing pipeline once, apply it across your entire dataset, export results as CSV.

      

      

        
03

        
        
Full preprocessing

        
Levelling, Gaussian filtering, outlier removal, non-measured point filling and texture alignment — chainable in any order.

      

    

  


  

    

      

        
Parameters

        
All ISO 25178 roughness parameters

        
Height, spatial, hybrid and functional parameters computed directly from surface topography data according to ISO 25178-2 and validated against MountainsMap.

        View full parameter list
      

      

        
Sa
Sq
Sz
Sp

        
Sv
Ssk
Sku
Sdr

        
Sdq
Sal
Str
Std

        
Smc
Sxp
Smr
Sk

        
Spk
Svk
Period
Depth

      

    

  


  

    
Workflow

    

      
01
Load
Drop your topography file into the browser. All processing happens locally.

      
02
Preprocess
Apply levelling, filtering and outlier removal. Changes reflect instantly in all plots.

      
03
Analyse
Select parameters and compute. View height maps, Abbott–Firestone and PSD plots.

      
04
Export
Run batch analysis across multiple files and export a full parameter table as CSV.

    

  


  

    Supported formats
    

      .vk4.vk6.sur
      .opd.xyz.csv
      .nms.plu.sdf
      .al3d.frt.lext
    

  


  

    
Ready to analyse your surfaces?

    
No installation required. Runs entirely in your browser. Your data never leaves your machine.

    
  


  









  
SURFALIZE

  

    

    Ready
  

  

    
    
    
    
  







  
Dimensions —

  
Step X — µm

  
Step Y — µm

  
Z range — µm







  
  

  
  

    

      
Surface map

      
3D view

      
Height distribution

      
Abbott–Firestone

      
Power spectrum

      
Parameters

      
Batch analysis

    


    

      

        
⬡

        
No file loaded

        
Click "Load file" or drag & drop a topography file

      


      

        

          
Drop a topography file or click to browse

          
.sur · .vk4 · .opd · .xyz · .sdf · and more

        

        
False-colour height map

        

      


      

        
3D surface

        

      


      

        
Height distribution histogram

        

      


      

        
Abbott–Firestone curve (areal material ratio)

        

      


      

        
2D power spectral density (log scale)

        

      


      

        
Calculated parameters

        

          

            Select parameters in the sidebar and click "Calculate parameters".
          

        

      


      

        
Load files


        

          
Drop multiple topography files or click to browse

          
Hold Ctrl/Cmd to select multiple files  ·  .sur · .vk4 · .opd · .xyz · and more

        

        

        

        

        

          

        


        

          
Results