Source: doc.rust-lang.org (std library reference) · crates.io database dump, 2026-07-25 (crates directory)Contact
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All 305,250 crates, alphabetically

Data as of 2026-07-25 (crates.io database dump, timestamp 2026-07-25T02:00:36Z). Source: crates.io · db-dump.tar.gz · methodology & corrections.

jpreprocessJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).45,964BSD-3-ClauseText processing jpreprocess-coreJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).46,612BSD-3-ClauseText processing jpreprocess-dictionaryJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).45,191BSD-3-ClauseText processing jpreprocess-dictionary-builderJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).35,140BSD-3-ClauseText processing jpreprocess-jpcommonJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).42,657BSD-3-ClauseText processing jpreprocess-naist-jdicJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).41,066BSD-3-ClauseText processing jpreprocess-njdJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).43,653BSD-3-ClauseText processing jpreprocess-windowJapanese text preprocessor for Text-to-Speech application (OpenJTalk rewrite in rust language).44,838BSD-3-ClauseText processing jpretJSON pretty formatter2,912MIT jprettA simple CLI tool to format json file.661MIT OR Apache-2.0 jpropno-std parser for java .properties files that actually works2,793MITNo standard libraryParsing tools jpropsreading property file in rust1,560MIT jproxyJust a proxy6,310MITNetwork programmingWeb programming jpsJump Point Search Implementation for Path Finding.9,423MIT OR Apache-2.0Aerospace::DronesAlgorithms jpsta simple string template engine that supports JSON Path27,301non-standard jptA simple cli tool to perform pivot operation on csv1,602MIT OR Apache-2.0Command line utilities jpush集成极光App推送3,183MIT OR Apache-2.0 jputputs and putc on unicode-width align for Rust4,261MITCommand-line interfaceCommand line utilities jpxJMESPath CLI with 490+ extended functions - a powerful jq alternative1,175MIT OR Apache-2.0Command line utilitiesParsing tools jpx-coreComplete JMESPath implementation with 490+ extension functions2,181MIT OR Apache-2.0Data structuresParsing tools jpx-engineJMESPath query engine with introspection, discovery, and advanced features969MIT OR Apache-2.0Data structuresParsing tools jpx-mcpJMESPath MCP server for AI assistants282MIT OR Apache-2.0Development toolsNetwork programming jpx-serverJMESPath query server supporting MCP, REST, and gRPC protocols94MIT OR Apache-2.0Network programmingWeb programming jpzipjpzip Japanese postal code SDK75MITAPI bindings jqjq.rs6,423UnlicenseCommand line utilitiesCompilers jq-clientHost bridge and client assembly for Jacquard BLE routing36Apache-2.0Network programming jq-link-profileBLE link profile for Jacquard routing92Apache-2.0Network programming jq-liteA lightweight CLI tool for querying JSON using dot notation113MITCommand line utilities jq-node-profileNode and topology snapshot models for Jacquard BLE clients95Apache-2.0Network programming jq-rsRun jq programs to extract data from json strings.56,060Apache-2.0/MITAPI bindings jq-srcAPI for compiling and link libjq from source.39,634Apache-2.0/MIT jq-sysGenerated bindings for libjq.69,627Apache-2.0/MITExternal FFI bindings jq_langProvides an AST for the jq query language5,034MIT jqcNatural language to jq filters — 100% offline, single binary (jq-coder)33MITCommand line utilities jqdataRust implementation for JQData client10,050MIT OR Apache-2.0 jqdata-blockingBlocking client of JQData3,160MIT OR Apache-2.0 jqdata-derivederive macros for JQData client5,672MIT OR Apache-2.0 jqdata-modelutility for jqdata8,200MIT OR Apache-2.0 jqesqueSimple string assignment expressions with JQ-esque syntax for JSON interaction3,277MITParsing tools jqishA subset of the `jq` language for working with in-memory data structures580Apache-2.0 OR MIT jqkjqk lists key patterns of a JSON file for jq.3,133MITCommand line utilities jqljql - JSON Query Language - is a fast and simple command-line tool to manipulate JSON data.249,983MIT OR Apache-2.0Command line utilitiesFilesystem jql-parserParser for jql - the JSON Query Language tool.89,907MIT OR Apache-2.0Command line utilitiesFilesystem jql-runnerRunner for jql - the JSON Query Language tool.89,115MIT OR Apache-2.0Command line utilitiesFilesystem jqoiviewA simple QOI image format viewer12,932MIT jQPalThe Julia bindings for the QPalRust library17BSD-2-Clause jqrA jq implementation in Rust79MITCommand line utilitiesParsing tools jqrutilsSmall Unix utilities: quiet, errfail, prefix36MIT jquants-api-clientA Rust client for the J-Quants API, providing seamless access to financial data.1,011MIT jquants_rsUnofficial wrapper for jquants api.1,604MIT jqueuersjobs queues manager4,135MIT jqunitA test framework for jq, built on top of libjq.1,714MITCommand line utilitiesDevelopment tools::Testing jrA jupyter repl written in rust27EUPL-1.2 jrainbowA badly implemented MD5 rainbow table2,941MITCommand line utilities jrdjson resource descriptor, as specified by https://www.packetizer.com/json/jrd/3,240MIT jrdbDocument oriented database created for learning purpose1,852MIT OR Apache-2.0 jrecord_deriveA procedural macro to derive record-like structs with getters and constructor45MIT jreflectionStatic reflection APIs for analyzing jars and jimage files4,097MIT OR Apache-2.0Parser implementations jrepA command line search tool for Jupyter notebooks1,545non-standardCommand line utilities jrestThe equivalent of Jest for Rust.10,550MITDevelopment tools::Testing jrest_hooksJrest `after()`, `after_each()`, `before()`, `before_each()` and `skip()` hooks.5,516MITDevelopment tools::Testing jrfAn underpowered JSON formatting cli3,487MITEncodingParsing tools jrichoceanUseful functions and common imports1,743MIT jrinx-abiABI for Jrinx5,167MIT jrinx-apexAPEX for Jrinx3,103MIT jrk-g2A rust embedded driver for pololu Jrk G25,209BSD-2-ClauseEmbedded developmentHardware support jrk-g2-rsA rust embedded driver for pololu Jrk G23,071BSD-2-ClauseEmbedded developmentHardware support jrlJournaling terminal app that prompts you questions from time to time when opening a new terminal and allows you to rate, describe…68MIT jrna journal app8,663AGPL-3.0-or-later jrnySimple SQL-based PostgreSQL schema revisions9,252MIT OR Apache-2.0Command line utilities jrpctypes for the jsonrpc specification, ultra lightweight21,042MIT OR Apache-2.0 jrpc-macroJSON-RPC crate1,834MIT jrpc-typesA simple but super helpful crate for (de)serializing JSON-RPC 2.0 objects.1,174non-standard jrpc2json rpc library.7,891MITNetwork programmingWeb programming jrsonnetRust jsonnet implementation590,799MIT jrsonnet-cliUtilities for building jrsonnet CLIs573,150MIT jrsonnet-depsCommand-line tool that lists imports of a jsonnet file19MITCommand line utilities jrsonnet-evaluatorjsonnet interpreter917,831MIT jrsonnet-fmtJrsonnet code formatter CLI20MIT jrsonnet-formatterJrsonnet code formatter49MIT jrsonnet-gcTracing garbage collector plugin for Rust.223,451MPL-2.0 jrsonnet-gc-deriveGarbage collector derive plugin for rust-gc222,894MPL-2.0 jrsonnet-gcmoduleCyclic garbage collection inspired by CPython's gc implementation.877,513MITMemory management jrsonnet-gcmodule-deriveGenerate code to implement Trace trait on structures.876,043MIT jrsonnet-importersMore importers for jrsonnet1,902MIT jrsonnet-internerJrsonnet string interning941,476MIT jrsonnet-irjsonnet language parser and AST434,188MIT jrsonnet-ir-parserJrsonnet hand-rolled parser which parses source directly into IR434,126MIT jrsonnet-lexerJrsonnet lexer shared between rowan and hand-rolled parser434,282MIT jrsonnet-macrosMacros to reduce boilerplate in jrsonnet-evaluator usage860,986MIT jrsonnet-parserjsonnet language parser and AST486,798MIT jrsonnet-peg-parserLegacy peg-based parser for jrsonnet242MIT jrsonnet-rowan-parserRowan-based CST for jrsonnet75MIT jrsonnet-stdlibjsonnet standard library packaged as crate917,392MIT jrsonnet-typesJrsonnet type system definition915,218MIT jrunCompile and run a Java source file in one command27MIT jrustA Rust macro that parses Java-like syntax and runs it as a Rust program3,483non-standard jrwsJSON-RPC 2.0 websocket client & server implementation.659MIT OR Apache-2.0AsynchronousNetwork programming jsCall JavaScript from WebAssembly92,361MIT OR Apache-2.0No standard libraryWebAssembly js-bindgenGenerate bindings that call JavaScript from WebAssembly9,750MIT OR Apache-2.0WebAssembly js-bridgea javas runtime base deno1,398MIT OR Apache-2.0 js-bridge-coreShared utilities for js-bridge tooling (logger, naming, cargo metadata, npm deps)77MIT js-buildersCrate available1,565MIT js-canvas-rendering-context-2dA library meant to be a zero dependency wrapper for the CanvasRenderingContext2D web api for use in WASM rust applications.6,407non-standard js-component-bindgenJS component bindgen for transpiling WebAssembly components into JavaScript68,864Apache-2.0 WITH LLVM-exceptionWebAssembly js-deobfuscatorUniversal JavaScript deobfuscator built on OXC131Apache-2.0CompilersDevelopment tools js-export-macroProc macro for dual wasm-bindgen/napi annotations via #[js_export]219MIT js-function-promisifyA library for working with js-sys functions as futures3,735MITAsynchronousWebAssembly js-helpersEasy interop utils for js objects in wasm9,417MIT OR Apache-2.0 js-internA macro for interning JavaScript primitives22,600MITCachingWebAssembly js-intern-coreInternal implementation details for the js-intern crate20,929MITCachingWebAssembly js-intern-proc-macroInternal implementation details for the js-intern crate20,261MITCachingWebAssembly js-json-queryA tool for processing JSON inputs with JavaScript, no dsl.4,123MIT OR Apache-2.0Command line utilities js-linkA full-featured API client for testing HTTP and WebSocket APIs68MITDevelopment toolsWeb programming js-macrosQuickly prototype procedural macros using JavaScript or TypeScript!7,940MIT OR Apache-2.0Development tools::Procedural macro helpers js-objectA macro for creating JavaScript objects4,190MITCachingWebAssembly js-promisesBindings for JS promises1,836MITWebAssembly js-protocolGenerated Rust types and commands for the Chrome DevTools Protocol (js-protocol)175MITDevelopment toolsWeb programming js-regexRust validator for ECMAScript regex literals based on regexpp.1,760MITParser implementations js-regexpErgonomic Rust bindings to the JavaScript standard built-in RegExp object5,581MITAPI bindingsText processing js-regexp-macrosproc-macro crate for js-regexp3,630MIT js-resolveA node.js module resolver5,867MIT js-sandboxExecute JavaScript code from Rust in a secure sandbox, and transport data to/from JS plug-ins.34,016Zlib js-sandbox-iosExecute JavaScript code from Rust in a secure sandbox, and transport data to/from JS plug-ins.8,775Zlib js-sandbox-macrosProcedural macros for js-sandbox15,503Zlib js-sandbox-macros-iosProcedural macros for js-sandbox3,054Zlib js-semverParser and evaluator for npm's flavor of Semantic Versioning793MIT-0No standard library js-source-mapperA rust library for consuming JavaScript source maps with a focus on performance. Supports Source Map revision 3.5,763MIT js-source-scopesUtilities for extracting and dealing with scope information in JS code4,087,580Apache-2.0 js-string-escapeEscape a string for use as a JavaScript string literal body. A faithful port of the js-string-escape npm package. Zero deps,…19MIT OR Apache-2.0EncodingNo standard library js-sysBindings for all JS global objects and functions in all JS environments like Node.js and browsers, built on `#[wasm_bindgen]`…416,296,404MIT OR Apache-2.0WebAssembly js-sys-futuresUtilities for working with the futures and js-sys crates.9,820Apache-2.0 WITH LLVM-exception js-sys-wryBindings for all JS global objects and functions in all JS environments like Node.js and browsers, built on `#[wasm_bindgen]`…280MIT OR Apache-2.0WebAssembly js-sys-xTarget-switching shim for js-sys and js-sys-wry4,770MIT OR Apache-2.0 js-testwasm bindgen js test utilities18,516MITDevelopment tools::TestingWebAssembly js-utilsUseful utilities to make development of browser-targeted Rust applications slightly less painful.10,993Apache-2.0 js0js0194MulanPSL-2.0 js0_authjs0_auth214MulanPSL-2.0 js0_captchajs0_captcha211MulanPSL-2.0 js2rust-bridgeFFI bridge runtime for js2rust-generated Zig code201MIT OR Apache-2.0Development toolsExternal FFI bindings js2rust-bridge-macroProc-macro for generating Rust FFI bindings from js2rust C ABI export metadata253MIT OR Apache-2.0Development toolsExternal FFI bindings js2zig-buildBuild.rs helper for js2zig-core: transpile JS to Zig during Cargo build19MIT OR Apache-2.0Development tools js2zig-coreCore JS-to-Zig transpiler library308MIT OR Apache-2.0CompilersDevelopment tools js8call_libIN DEV - A simple library for interfacing with JS8Call4,147Apache-2.0 js_arcA Send + Sync abstraction for JsValue in WASM1,496MIT js_callA library for calling javascript1,821MIT OR Apache-2.0 js_domEasy use js and dom in rust wasm(Don't use, its under development).2,838MIT js_ergoErgonomic, JavaScript-style string helpers for Rust (padStart and friends).35MITText processing js_ffiA FFI library for calling javascript58,356MIT OR Apache-2.0No standard libraryWebAssembly js_intJavaScript-interoperable integer types1,367,951MITNo standard library js_libSimple 'javascript-like' functions1,574MIT js_like_eqJavaScript-style loose equality, strict equality, relational comparison, and truthiness for serde_json::Value.18MIT OR Apache-2.0Data structuresValue formatting js_optionAn Option-like type with separate null and undefined variants1,502,730MIT js_parserJavascript Parser : generate Aleph Syntax Tree.1,624non-standard js_proxy_genJavascript code generator1,890MIT OR Apache-2.0 js_resized_event_channeljs resized event channel (only supports full size window)17,973MIT js_sidecarRun a pool of JavaScript engines1,289Apache-2.0 OR MIT js_sizersget your javascript file size after minification and gzip10,260MIT js_typify_gostructA rust tool meant to convert a golang struct to a js type object.17,077MIT OR Apache-2.0 js_wasm_runtime_layerWebAssembly runtime compatibility interface implementation for your web browser's WebAssembly runtime.3,187MIT OR Apache-2.0 js_workspace_toolsJavascript Monorepo Workspace Tools1,385MIT jsaWrite audio DSP with JavaScript/TypeScript.26MIT jsaasAn HTTP service that uses the Duktape JavaScript engine to safely execute JavaScript in a sandboxed environment.4,834Apache-2.0 jsandboxJavaScript sandbox using deno runtime.8,257MIT jsavePersist serializable in-memory data in JSON format5,327GPL-3.0-or-laterDatabase interfacesDatabase implementations jsaxA SAX-style parser for JSON.126MIT jsbindBindings for basic JS types required for webbind13,629MITAPI bindingsWebAssembly jsbsim-ffiA wrapper around the C++ JSBSim library to allow its use in rust116MIT jsbsimrsA Rust interface for JSBSim, a flight dynamics model (FDM) used in flight simulators.75MIT jsbt-rustA Rust implementation of the JSBT binary serialization format for interoperability with JavaScript54MITData structuresEncoding jscrust bindings to WebKit JavaScriptCore4,363BSD-2-Clause jsc-sysWebKit JavaScriptCore bundle6,744BSD-2-Clause jscalendarJSCalendar (RFC 8984) data model with parser-agnostic JSON support36MITDate and timeEncoding jscalendar-kitJSCalendar core data types, validation, patching, recurrence expansion, and export21MIT jscanHigh-performance zero-allocation JSON iterator and validator. Port of github.com/romshark/jscan/v2.22MITEncodingNo standard library jscjsRust bindings to Webkit's JavaScriptCore JavaScript engine.2,930MPL-2.0 jscjs_sysSystem crate providing bindings to the Webkit JavsScript engine, JavaScriptCore5,026AGPL-3.0 jscontactRFC 95537,117MITData structuresEncoding jscpdCopy/paste detector — fast Rust-based CLI for code duplication detection2,258MIT jscpd-rs50x+ faster duplicate-code detector for CI/CD; jscpd-compatible CLI, SARIF, JSON, HTML reports228MITCommand line utilitiesDevelopment tools jsdet-browserBrowser API bridges for jsdet — document, window, navigator, fetch, canvas, CSS68MIT jsdet-chrome-extChrome Extension API bridges for jsdet — chrome.tabs, chrome.cookies, chrome.webRequest, etc.69MIT jsdet-cliCLI for jsdet — scan Chrome extensions, detonate JavaScript, find vulnerabilities21MIT jsdet-coreCore WASM-sandboxed JavaScript detonation engine157MIT jsdocJsDoc parser writen in rust620,285Apache-2.0 jsdomA rust javascript dom parser for web scraping15,149MITWeb programming jsduJSON file size analyzer1,460GPL-3.0 jseJSE (JSON Structural Expression) interpreter for Rust - AST-based architecture74MITData structuresParser implementations jsendA lightweight Rust crate for structuring API responses in the JSend format.5,726MITWeb programming jseqioReading and writing biological sequences in FASTA or FASTQ format.10,896MIT jserveA Rust-based server application using Actix-Web.1,312MIT jserviceA jService API wrapper.9,199Apache-2.0 jsescEscape a string for safe embedding in JavaScript or JSON source. A faithful port of the jsesc npm package's string escaping. Zero…18MIT OR Apache-2.0EncodingNo standard library jseta command-line tool for performing set operations on a list of json files1,824MIT OR Apache-2.0Command line utilities jsexecrun javascript console.log to result12,554Apache-2.0 jsfJSON Signature Format (JSF) helpers. (Extremely early, experimental stage, essentially not to be used yet!)1,374MIT jsfuckA JSFuck obfuscator written in Rust.10,181MIT jsglueA Rust framework for building frontends with JS/TS!1,629MIT jshAn experiment at making a fast, hookable shell program.1,363MIT/Apache-2.0 jshapeRepair malformed JSON and render a stable, human-readable structural outline.20MITCommand line utilitiesParser implementations