FORMATS.md

jscpd Supported Formats

This document lists all 223 language formats recognized by jscpd, derived from the source of truth in packages/tokenizer/src/formats.ts.

130 formats are auto-detected by file extension. 88 registered formats have a grammar but no built-in extension mapping — use --formats-exts or --formats-names to activate them. An additional 5 formats (clike, comments, hpkp, hsts, keymap) are internal grammar dependencies used by other formats. url is excluded from detection.

Supported Formats (Auto-Detected by Extension)

These formats are detected automatically by file extension. No extra flags needed — just point jscpd at your source directory.

Cross-Format Tokenizers

These formats use bespoke multi-block tokenizers that extract embedded code sections (<script>, <style>, <template>) and resolve each block to the correct sub-format, enabling cross-format duplicate detection (e.g., a <script> block in a .vue file matched against .ts files).

• astro (.astro) — Astro, modern static-site builder component format mixing HTML, JS, and CSS.
• svelte (.svelte) — Svelte, reactive component framework with compiled templates.
• vue (.vue) — Vue Single-File Component, combining template, script, and style blocks.
• markdown (.md, .markdown, .mkd) — Markdown, lightweight markup language. Fenced code blocks are tokenized independently by language.

General-Purpose Languages

• actionscript (.as) — Adobe ActionScript, scripting language for Flash and Flex applications.
• ada (.ada) — Ada, strongly-typed language for systems and embedded programming.
• antlr4 (.g4) — ANTLR v4 grammar definition files.
• apex (.cls, .trigger, .apex) — Salesforce Apex, strongly-typed OOP language for the Salesforce platform.
• apl (.apl) — APL, array-oriented programming language.
• aspnet (.asp, .aspx) — ASP.NET, Microsoft server-side web application files.
• awk (.awk) — AWK, text-processing scripting language.
• bash (.sh, .ksh, .bash) — Bash and POSIX shell scripts. Also detected via shebang for extensionless scripts.
• basic (.bas) — BASIC, beginner-oriented general-purpose programming language.
• bicep (.bicep) — Azure Bicep, infrastructure-as-code DSL for Microsoft Azure.
• brainfuck (.b, .bf) — Brainfuck, minimalist esoteric programming language.
• c (.c, .z80) — C, general-purpose low-level programming language.
• c-header (.h) — C header files. Inherits c grammar.
• cfml (.cfm) — ColdFusion Markup Language, server-side HTML template files. Inherits markup grammar.
• cfscript (.cfc) — ColdFusion components written in CFScript.
• clojure (.clj, .cljs, .cljc, .cljx, .edn) — Clojure, functional Lisp dialect for the JVM.
• cmake (.cmake) — CMake build system scripts.
• coffeescript (.coffee) — CoffeeScript, transpiled language that compiles to JavaScript.
• cpp (.cpp, .c++, .cc, .cxx) — C++, systems programming language extending C with OOP.
• cpp-header (.hpp, .h++, .hh, .hxx) — C++ header files. Inherits cpp grammar.
• crystal (.cr) — Crystal, statically-typed language with Ruby-like syntax.
• csharp (.cs) — C#, Microsoft's OOP language for .NET.
• csv (.csv) — CSV, comma-separated values data files.
• css (.css, .gss) — CSS, Cascading Style Sheets for web styling.
• d (.d) — D, systems language combining C speed with modern safety features.
• dart (.dart) — Dart, Google's client-optimized language used in Flutter.
• diff (.diff, .patch) — Unified diff and patch files.
• dot (.dot, .gv) — Graphviz DOT language for graph and network diagrams.
• eiffel (.e) — Eiffel, OOP language with design-by-contract methodology.
• elm (.elm) — Elm, functional language for front-end web development.
• erlang (.erl, .erlang) — Erlang, concurrent functional language for distributed systems.
• excel-formula (.xlsx, .xls) — Microsoft Excel spreadsheet files.
• fortran (.f, .for, .f77, .f90) — Fortran, scientific and numerical computing language.
• fsharp (.fs) — F#, functional-first language for .NET.
• gdscript (.gd) — GDScript, scripting language for the Godot game engine.
• gettext (.po) — GNU gettext PO translation and localisation files.
• gherkin (.feature) — Gherkin, BDD scenario language used in Cucumber and Behave.
• go (.go) — Go, statically-typed compiled language from Google.
• graphql (.graphql) — GraphQL, query language for APIs.
• groovy (.groovy, .gradle) — Groovy, dynamic JVM language; also covers Gradle build files.
• haml (.haml) — Haml, HTML abstraction markup language.
• handlebars (.hb, .hbs, .handlebars) — Handlebars, logicless HTML templating language.
• haskell (.hs, .lhs) — Haskell, purely functional programming language.
• haxe (.hx, .hxml) — Haxe, cross-platform programming language and toolkit.
• hcl (.tf, .hcl) — HashiCorp Configuration Language, used in Terraform and Vault.
• idris (.idr) — Idris, dependently-typed functional programming language.
• ignore (.gitignore) — Git and tool ignore-pattern files.
• ini (.ini) — INI, simple key-value configuration file format.
• java (.java) — Java, OOP language for the JVM.
• javascript (.js, .es, .es6, .mjs, .cjs) — JavaScript, scripting language for the web and Node.js.
• json (.json, .map, .jsonld) — JSON, JavaScript Object Notation data interchange format.
• json5 (.json5) — JSON5, relaxed JSON with comments and trailing commas.
• jsx (.jsx) — JSX, JavaScript with embedded XML syntax for React.
• julia (.jl) — Julia, high-performance language for scientific computing.
• kotlin (.kt, .kts) — Kotlin, modern JVM language fully interoperable with Java.
• latex (.tex) — LaTeX, document preparation and typesetting system.
• less (.less) — Less, CSS preprocessor with variables, mixins, and nesting.
• lilypond (.ly) — LilyPond, text-based music notation language.
• linker-script (.ld) — GNU linker scripts for memory layout control.
• lisp (.cl, .lisp, .el) — Common Lisp and Emacs Lisp source files.
• livescript (.ls) — LiveScript, functional language that compiles to JavaScript.
• llvm (.ll) — LLVM IR, LLVM Intermediate Representation text format.
• log (.log) — Log files, structured or unstructured application output.
• lua (.lua) — Lua, lightweight embeddable scripting language.
• markup (.html, .htm, .xml, .xsl, .xslt, .svg, .ejs, .jsp) — HTML, XML, SVG, and similar markup languages.
• nsis (.nsh, .nsi) — NSIS, Nullsoft Scriptable Install System scripts.
• objectivec (.m, .mm) — Objective-C, C-based OOP language for Apple platforms.
• ocaml (.ocaml, .ml, .mli, .mll, .mly) — OCaml, functional language with strong type inference.
• openqasm (.qasm) — OpenQASM, open quantum assembly language.
• oz (.oz) — Oz, multi-paradigm language for the Mozart Programming System.
• pascal (.pas, .p) — Pascal, structured imperative programming language.
• perl (.pl, .pm) — Perl, text-processing scripting language.
• php (.php, .phtml) — PHP, server-side web scripting language.
• plant-uml (.puml, .plantuml) — PlantUML, text-based UML diagram definition language.
• plsql (.plsql) — PL/SQL, Oracle's procedural extension to SQL.
• powerquery (.pq) — Power Query M, data transformation language for Microsoft tools.
• powershell (.ps1, .psd1, .psm1) — PowerShell, task automation and configuration management shell.
• properties (.properties) — Java .properties configuration files.
• protobuf (.proto) — Protocol Buffers, Google's binary serialization schema language.
• pug (.pug, .jade) — Pug (formerly Jade), high-performance HTML template engine.
• puppet (.pp, .puppet) — Puppet, infrastructure-as-code configuration DSL.
• purescript (.purs) — PureScript, strongly-typed functional language compiling to JavaScript.
• python (.py, .pyx, .pxd, .pxi) — Python, high-level general-purpose programming language.
• q (.q) — Q/kdb+, vector programming language for time-series databases.
• qsharp (.qs) — Q#, Microsoft's quantum programming language.
• r (.r, .R) — R, statistical computing and data visualisation language.
• racket (.rkt) — Racket, Lisp-family language for language-oriented programming.
• rescript (.res) — ReScript, fast typed language compiling to JavaScript.
• robotframework (.robot) — Robot Framework, acceptance testing and RPA framework DSL.
• ruby (.rb) — Ruby, dynamic expressive OOP scripting language.
• rust (.rs) — Rust, systems language focused on memory safety and performance.
• sas (.sas) — SAS, statistical analysis software language.
• sass (.sass) — Sass, CSS extension language (indented syntax).
• scala (.scala) — Scala, OOP and functional language for the JVM.
• scheme (.scm, .ss) — Scheme, minimalist Lisp dialect.
• scss (.scss) — SCSS, Sass CSS extension with C-style bracket syntax.
• smalltalk (.st) — Smalltalk, pioneering OOP language and live environment.
• smarty (.smarty, .tpl) — Smarty, PHP template engine.
• solidity (.sol) — Solidity, smart contract language for Ethereum and EVM chains.
• soy (.soy) — Google Closure Templates (Soy), type-safe HTML templating.
• sparql (.rq) — SPARQL, RDF graph query language.
• sql (.sql, .cql) — SQL, Structured Query Language for relational databases.
• stylus (.styl, .stylus) — Stylus, expressive dynamic CSS preprocessor.
• swift (.swift) — Swift, Apple's modern language for iOS and macOS development.
• tap (.tap) — TAP, Test Anything Protocol output format.
• tcl (.tcl) — Tcl, embeddable tool command language.
• textile (.textile) — Textile, lightweight markup language for web content.
• toml (.toml) — TOML, Tom's Obvious Minimal Language configuration format.
• tsx (.tsx) — TSX, TypeScript with embedded JSX syntax for React.
• tt2 (.tt2) — Template Toolkit 2, Perl-based templating language.
• turtle (.ttl) — Turtle, Terse RDF Triple Language for semantic web data.
• twig (.twig) — Twig, flexible fast PHP templating engine.
• typescript (.ts, .mts, .cts) — TypeScript, statically typed superset of JavaScript.
• txt (.txt) — Plain text files.
• unrealscript (.uc) — UnrealScript, scripting language for Unreal Engine 3.
• vbnet (.vb) — Visual Basic .NET, Microsoft's OOP language for .NET.
• velocity (.vtl) — Apache Velocity, Java-based template engine.
• verilog (.v) — Verilog, hardware description language for digital circuits.
• vhdl (.vhd, .vhdl) — VHDL, VHSIC Hardware Description Language.
• wgsl (.wgsl) — WGSL, WebGPU Shading Language.
• wolfram (.wl, .nb) — Wolfram Language, symbolic language used in Mathematica.
• xquery (.xy, .xquery) — XQuery, query and transformation language for XML databases.
• yaml (.yaml, .yml) — YAML, human-readable data serialisation format.
• zig (.zig) — Zig, low-level systems programming language with no hidden control flow.

Registered Formats (No Extension Mapping)

These formats have a working grammar but no built-in file extension mapping. Use --formats-exts to associate extensions at run time, or --formats-names for extensionless files.

With Grammar (reprism engine)

• abap — SAP ABAP, Advanced Business Application Programming language for SAP systems. jscpd --formats-exts "abap:abap" ./src

• apacheconf — Apache HTTP Server configuration files. jscpd --formats-exts "apacheconf:conf" ./src

• applescript — AppleScript, macOS automation scripting language. jscpd --formats-exts "applescript:applescript,scpt" ./src

• arduino — Arduino, C++ dialect for microcontroller sketches. jscpd --formats-exts "arduino:ino" ./src

• arff — ARFF, Weka attribute-relation file format for machine learning datasets. jscpd --formats-exts "arff:arff" ./src

• asciidoc — AsciiDoc, text document format for technical writing. jscpd --formats-exts "asciidoc:adoc,asciidoc" ./src

• asm6502 — MOS 6502 assembly language. jscpd --formats-exts "asm6502:s,asm" ./src

• autohotkey — AutoHotkey, Windows automation and hotkey scripting language. jscpd --formats-exts "autohotkey:ahk" ./src

• autoit — AutoIt, Windows GUI automation scripting language. jscpd --formats-exts "autoit:au3" ./src

• batch — Windows batch and cmd scripts. jscpd --formats-exts "batch:bat,cmd" ./src

• bison — GNU Bison parser generator grammar files. jscpd --formats-exts "bison:y,yy" ./src

• bro — Bro/Zeek, network traffic analysis scripting language. jscpd --formats-exts "bro:bro,zeek" ./src

• csp — Content Security Policy header files. jscpd --formats-exts "csp:csp" ./src

• css-extras — Extended CSS at-rules and selector patterns. jscpd --formats-exts "css-extras:css" ./src

• django — Django/Jinja2, Python web framework HTML template language. jscpd --formats-exts "django:html,djhtml" ./templates

• docker — Dockerfile, Docker container image build instructions. jscpd --formats-names "docker:Dockerfile" ./src or jscpd --formats-exts "docker:dockerfile" ./src

• elixir — Elixir, functional language built on Erlang/BEAM. jscpd --formats-exts "elixir:ex,exs" ./src

• erb — ERB, Embedded Ruby HTML templating. jscpd --formats-exts "erb:erb" ./src

• flow — Flow, Facebook's static type checker annotations for JavaScript. jscpd --formats-exts "flow:js" ./src

• gedcom — GEDCOM, genealogical data interchange format. jscpd --formats-exts "gedcom:ged" ./src

• git — Git configuration and commit message files. jscpd --formats-exts "git:gitconfig" ./src

• glsl — GLSL, OpenGL Shading Language. jscpd --formats-exts "glsl:glsl,vert,frag" ./src

• http — HTTP request and response message format. jscpd --formats-exts "http:http" ./src

• ichigojam — IchigoJam BASIC, beginner BASIC for the IchigoJam microcomputer. jscpd --formats-exts "ichigojam:bas" ./src

• icon — Icon, high-level general-purpose programming language. jscpd --formats-exts "icon:icn" ./src

• inform7 — Inform 7, natural language interactive fiction authoring system. jscpd --formats-exts "inform7:ni,i7x" ./src

• io — Io, prototype-based OOP language with concurrency primitives. jscpd --formats-exts "io:io" ./src

• j — J, high-performance array programming language (successor to APL). jscpd --formats-exts "j:ijs" ./src

• jolie — Jolie, service-oriented programming language for microservices. jscpd --formats-exts "jolie:ol,iol" ./src

• liquid — Liquid, Shopify's safe customer-facing templating language. jscpd --formats-exts "liquid:liquid" ./src

• lolcode — LOLCODE, humorous esoteric programming language. jscpd --formats-exts "lolcode:lol" ./src

• makefile — GNU Make build scripts. jscpd --formats-names "makefile:Makefile,GNUmakefile" ./src

• matlab — MATLAB, matrix-oriented numerical computing language. jscpd --formats-exts "matlab:m" ./src

• mel — MEL, Maya Embedded Language for Autodesk Maya automation. jscpd --formats-exts "mel:mel" ./src

• mizar — Mizar, formal mathematics and proof assistant language. jscpd --formats-exts "mizar:miz" ./src

• monkey — Monkey, cross-platform game development language. jscpd --formats-exts "monkey:monkey" ./src

• n4js — N4JS, typed JavaScript superset by NumberFour. jscpd --formats-exts "n4js:n4js" ./src

• nasm — NASM, Netwide Assembler x86 assembly syntax. jscpd --formats-exts "nasm:asm,nasm" ./src

• nginx — Nginx web server configuration files. jscpd --formats-exts "nginx:conf,nginx" ./src

• nim — Nim, statically-typed compiled systems language. jscpd --formats-exts "nim:nim" ./src

• nix — Nix, purely functional package manager configuration language. jscpd --formats-exts "nix:nix" ./src

• opencl — OpenCL, open standard for parallel programming across CPUs and GPUs. jscpd --formats-exts "opencl:cl" ./src

• parigp — PARI/GP, computer algebra system scripting language. jscpd --formats-exts "parigp:gp" ./src

• processing — Processing, visual arts and creative coding language. jscpd --formats-exts "processing:pde" ./src

• prolog — Prolog, logic programming language. jscpd --formats-exts "prolog:pl,pro" ./src

• promql — PromQL, Prometheus time-series query language. jscpd --formats-exts "promql:promql" ./src

• pure — Pure, functional language based on term rewriting. jscpd --formats-exts "pure:pure" ./src

• qore — Qore, high-level multi-threaded programming language. jscpd --formats-exts "qore:q,qm" ./src

• reason — ReasonML, OCaml-based language with JavaScript-friendly syntax. jscpd --formats-exts "reason:re,rei" ./src

• renpy — Ren'Py, visual novel scripting language. jscpd --formats-exts "renpy:rpy" ./src

• rest — reStructuredText, documentation markup language used in Sphinx. jscpd --formats-exts "rest:rst" ./src

• rip — Rip, object-oriented scripting language. jscpd --formats-exts "rip:rip" ./src

• roboconf — Roboconf, graph-based distributed application deployment language. jscpd --formats-exts "roboconf:graph,instances" ./src

• vim — VimScript, Vim editor scripting and configuration language. jscpd --formats-exts "vim:vim" ./src

• wasm — WebAssembly text format (WAT). jscpd --formats-exts "wasm:wat" ./src

• wiki — MediaWiki markup language. jscpd --formats-exts "wiki:wiki" ./src

• xeora — Xeora, ASP.NET-style web framework template language. jscpd --formats-exts "xeora:xeora,xchtml" ./src

• xojo — Xojo, cross-platform RAD development language. jscpd --formats-exts "xojo:xojo_code,xojo_window" ./src

Extension Detection Only (No Grammar)

These formats register file extensions for detection but have no bundled grammar — tokenization returns an empty array. They still benefit from jscpd's blank-line and structural matching.

• abnf — Augmented Backus-Naur Form grammar notation. jscpd --formats-exts "abnf:abnf" ./src

• agda — Agda, dependently-typed functional programming language. jscpd --formats-exts "agda:agda" ./src

• aql — AQL, ArangoDB query language. jscpd --formats-exts "aql:aql" ./src

• armasm — ARM assembly language. jscpd --formats-exts "armasm:s,asm" ./src

• bnf — BNF, Backus-Naur Form grammar notation. jscpd --formats-exts "bnf:bnf" ./src

• cobol — COBOL, common business-oriented language. jscpd --formats-exts "cobol:cob,cbl" ./src

• cypher — Cypher, graph query language for Neo4j. jscpd --formats-exts "cypher:cypher,cql" ./src

• dhall — Dhall, programmable total configuration language. jscpd --formats-exts "dhall:dhall" ./src

• dns-zone-file — DNS zone file format. jscpd --formats-exts "dns-zone-file:zone" ./src

• ebnf — EBNF, Extended Backus-Naur Form grammar notation. jscpd --formats-exts "ebnf:ebnf" ./src

• editorconfig — .editorconfig, per-directory editor configuration format. jscpd --formats-exts "editorconfig:editorconfig" ./src

• factor — Factor, concatenative stack-based programming language. jscpd --formats-exts "factor:factor" ./src

• ftl — FreeMarker Template Language, Java-based template engine. jscpd --formats-exts "ftl:ftl" ./src

• gcode — G-code, CNC machine tool programming language. jscpd --formats-exts "gcode:gcode,nc" ./src

• gml — GML, GameMaker Language for game logic and events. jscpd --formats-exts "gml:gml" ./src

• go-module — Go module files (go.mod and go.sum). jscpd --formats-names "go-module:go.mod" ./src

• hlsl — HLSL, High-Level Shading Language for DirectX. jscpd --formats-exts "hlsl:hlsl,hlsli" ./src

• jq — jq, JSON query and transformation language. jscpd --formats-exts "jq:jq" ./src

• kusto — KQL/Kusto, Azure Data Explorer and Log Analytics query language. jscpd --formats-exts "kusto:kql" ./src

• mermaid — Mermaid, diagram-as-code definition language. jscpd --formats-exts "mermaid:mmd" ./src

• mongodb — MongoDB shell and aggregation pipeline query language. jscpd --formats-exts "mongodb:mongo" ./src

• n1ql — N1QL, Couchbase's SQL-like query language for JSON documents. jscpd --formats-exts "n1ql:n1ql" ./src

• odin — Odin, data-oriented systems programming language. jscpd --formats-exts "odin:odin" ./src

• regex — Regular expression patterns. jscpd --formats-exts "regex:regex" ./src

• rego — Rego, Open Policy Agent (OPA) policy language. jscpd --formats-exts "rego:rego" ./src

• shell-session — Shell session transcripts with prompt markers. jscpd --formats-exts "shell-session:sh-session,console" ./src

• smali — Smali, Android Dalvik bytecode assembly language. jscpd --formats-exts "smali:smali" ./src

• stata — Stata, statistical analysis and data management language. jscpd --formats-exts "stata:do,ado" ./src

• typoscript — TypoScript, TYPO3 CMS configuration and templating language. jscpd --formats-exts "typoscript:typoscript,tsconfig" ./src

• vala — Vala, OOP language that compiles to C for GNOME applications. jscpd --formats-exts "vala:vala,vapi" ./src

Shebang Detection

jscpd can detect duplications in script files that have no file extension by reading the #! shebang line. See Shebang Detection in the main README for details.

Interpreter	Detected as
bash, sh, zsh, fish, dash, ksh	bash
python, python3, python2	python
node, nodejs	javascript
ruby	ruby
perl	perl
php	php
lua	lua
tclsh, wish	tcl
Rscript	r
groovy	groovy
swift	swift
kotlin	kotlin