Standard library ▾

Name Synopsis
tar Package tar implements access to tar archives.
zip Package zip provides support for reading and writing ZIP archives.
bufio Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O.
builtin Package builtin provides documentation for Go's predeclared identifiers.
bytes Package bytes implements functions for the manipulation of byte slices.
bzip2 Package bzip2 implements bzip2 decompression.
flate Package flate implements the DEFLATE compressed data format, described in RFC 1951.
gzip Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952.
lzw Package lzw implements the Lempel-Ziv-Welch compressed data format, described in T. A. Welch, “A Technique for High-Performance Data Compression”, Computer, 17(6) (June 1984), pp 8-19.
zlib Package zlib implements reading and writing of zlib format compressed data, as specified in RFC 1950.
heap Package heap provides heap operations for any type that implements heap.Interface.
list Package list implements a doubly linked list.
ring Package ring implements operations on circular lists.
context Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
crypto Package crypto collects common cryptographic constants.
aes Package aes implements AES encryption (formerly Rijndael), as defined in U.S. Federal Information Processing Standards Publication 197.
boring Package boring exposes functions that are only available when building with Go+BoringCrypto.
cipher Package cipher implements standard block cipher modes that can be wrapped around low-level block cipher implementations.
des Package des implements the Data Encryption Standard (DES) and the Triple Data Encryption Algorithm (TDEA) as defined in U.S. Federal Information Processing Standards Publication 46-3.
dsa Package dsa implements the Digital Signature Algorithm, as defined in FIPS 186-3.
ecdsa Package ecdsa implements the Elliptic Curve Digital Signature Algorithm, as defined in FIPS 186-4 and SEC 1, Version 2.0.
ed25519 Package ed25519 implements the Ed25519 signature algorithm.
elliptic Package elliptic implements the standard NIST P-224, P-256, P-384, and P-521 elliptic curves over prime fields.
hmac Package hmac implements the Keyed-Hash Message Authentication Code (HMAC) as defined in U.S. Federal Information Processing Standards Publication 198.
md5 Package md5 implements the MD5 hash algorithm as defined in RFC 1321.
rand Package rand implements a cryptographically secure random number generator.
rc4 Package rc4 implements RC4 encryption, as defined in Bruce Schneier's Applied Cryptography.
rsa Package rsa implements RSA encryption as specified in PKCS #1 and RFC 8017.
sha1 Package sha1 implements the SHA-1 hash algorithm as defined in RFC 3174.
sha256 Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.
sha512 Package sha512 implements the SHA-384, SHA-512, SHA-512/224, and SHA-512/256 hash algorithms as defined in FIPS 180-4.
subtle Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly.
tls Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446.
fipsonly Package fipsonly restricts all TLS configuration to FIPS-approved settings.
x509 Package x509 parses X.509-encoded keys and certificates.
pkix Package pkix contains shared, low level structures used for ASN.1 parsing and serialization of X.509 certificates, CRL and OCSP.
sql Package sql provides a generic interface around SQL (or SQL-like) databases.
driver Package driver defines interfaces to be implemented by database drivers as used by package sql.
buildinfo Package buildinfo provides access to information embedded in a Go binary about how it was built.
dwarf Package dwarf provides access to DWARF debugging information loaded from executable files, as defined in the DWARF 2.0 Standard at http://dwarfstd.org/doc/dwarf-2.0.0.pdf
elf Package elf implements access to ELF object files.
gosym Package gosym implements access to the Go symbol and line number tables embedded in Go binaries generated by the gc compilers.
macho Package macho implements access to Mach-O object files.
pe Package pe implements access to PE (Microsoft Windows Portable Executable) files.
plan9obj Package plan9obj implements access to Plan 9 a.out object files.
embed Package embed provides access to files embedded in the running Go program.
encoding Package encoding defines interfaces shared by other packages that convert data to and from byte-level and textual representations.
ascii85 Package ascii85 implements the ascii85 data encoding as used in the btoa tool and Adobe's PostScript and PDF document formats.
asn1 Package asn1 implements parsing of DER-encoded ASN.1 data structures, as defined in ITU-T Rec X.690.
base32 Package base32 implements base32 encoding as specified by RFC 4648.
base64 Package base64 implements base64 encoding as specified by RFC 4648.
binary Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
csv Package csv reads and writes comma-separated values (CSV) files.
gob Package gob manages streams of gobs - binary values exchanged between an Encoder (transmitter) and a Decoder (receiver).
hex Package hex implements hexadecimal encoding and decoding.
json Package json implements encoding and decoding of JSON as defined in RFC 7159.
pem Package pem implements the PEM data encoding, which originated in Privacy Enhanced Mail.
xml Package xml implements a simple XML 1.0 parser that understands XML name spaces.
errors Package errors implements functions to manipulate errors.
expvar Package expvar provides a standardized interface to public variables, such as operation counters in servers.
flag Package flag implements command-line flag parsing.
fmt Package fmt implements formatted I/O with functions analogous to C's printf and scanf.
ast Package ast declares the types used to represent syntax trees for Go packages.
build Package build gathers information about Go packages.
constraint Package constraint implements parsing and evaluation of build constraint lines.
constant Package constant implements Values representing untyped Go constants and their corresponding operations.
doc Package doc extracts source code documentation from a Go AST.
comment Package comment implements parsing and reformatting of Go doc comments, (documentation comments), which are comments that immediately precede a top-level declaration of a package, const, func, type, or var.
format Package format implements standard formatting of Go source.
importer Package importer provides access to export data importers.
parser Package parser implements a parser for Go source files.
printer Package printer implements printing of AST nodes.
scanner Package scanner implements a scanner for Go source text.
token Package token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates).
types Package types declares the data types and implements the algorithms for type-checking of Go packages.
hash Package hash provides interfaces for hash functions.
adler32 Package adler32 implements the Adler-32 checksum.
crc32 Package crc32 implements the 32-bit cyclic redundancy check, or CRC-32, checksum.
crc64 Package crc64 implements the 64-bit cyclic redundancy check, or CRC-64, checksum.
fnv Package fnv implements FNV-1 and FNV-1a, non-cryptographic hash functions created by Glenn Fowler, Landon Curt Noll, and Phong Vo.
maphash Package maphash provides hash functions on byte sequences.
html Package html provides functions for escaping and unescaping HTML text.
template Package template (html/template) implements data-driven templates for generating HTML output safe against code injection.
image Package image implements a basic 2-D image library.
color Package color implements a basic color library.
palette Package palette provides standard color palettes.
draw Package draw provides image composition functions.
gif Package gif implements a GIF image decoder and encoder.
jpeg Package jpeg implements a JPEG image decoder and encoder.
png Package png implements a PNG image decoder and encoder.
suffixarray Package suffixarray implements substring search in logarithmic time using an in-memory suffix array.
io Package io provides basic interfaces to I/O primitives.
fs Package fs defines basic interfaces to a file system.
ioutil Package ioutil implements some I/O utility functions.
log Package log implements a simple logging package.
syslog Package syslog provides a simple interface to the system log service.
math Package math provides basic constants and mathematical functions.
big Package big implements arbitrary-precision arithmetic (big numbers).
bits Package bits implements bit counting and manipulation functions for the predeclared unsigned integer types.
cmplx Package cmplx provides basic constants and mathematical functions for complex numbers.
rand Package rand implements pseudo-random number generators unsuitable for security-sensitive work.
mime Package mime implements parts of the MIME spec.
multipart Package multipart implements MIME multipart parsing, as defined in RFC 2046.
quotedprintable Package quotedprintable implements quoted-printable encoding as specified by RFC 2045.
net Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
http Package http provides HTTP client and server implementations.
cgi Package cgi implements CGI (Common Gateway Interface) as specified in RFC 3875.
cookiejar Package cookiejar implements an in-memory RFC 6265-compliant http.CookieJar.
fcgi Package fcgi implements the FastCGI protocol.
httptest Package httptest provides utilities for HTTP testing.
httptrace Package httptrace provides mechanisms to trace the events within HTTP client requests.
httputil Package httputil provides HTTP utility functions, complementing the more common ones in the net/http package.
pprof Package pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.
mail Package mail implements parsing of mail messages.
netip Package netip defines an IP address type that's a small value type.
rpc Package rpc provides access to the exported methods of an object across a network or other I/O connection.
jsonrpc Package jsonrpc implements a JSON-RPC 1.0 ClientCodec and ServerCodec for the rpc package.
smtp Package smtp implements the Simple Mail Transfer Protocol as defined in RFC 5321.
textproto Package textproto implements generic support for text-based request/response protocols in the style of HTTP, NNTP, and SMTP.
url Package url parses URLs and implements query escaping.
os Package os provides a platform-independent interface to operating system functionality.
exec Package exec runs external commands.
signal Package signal implements access to incoming signals.
user Package user allows user account lookups by name or id.
path Package path implements utility routines for manipulating slash-separated paths.
filepath Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
plugin Package plugin implements loading and symbol resolution of Go plugins.
reflect Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types.
regexp Package regexp implements regular expression search.
syntax Package syntax parses regular expressions into parse trees and compiles parse trees into programs.
runtime Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines.
cgo Package cgo contains runtime support for code generated by the cgo tool.
debug Package debug contains facilities for programs to debug themselves while they are running.
metrics Package metrics provides a stable interface to access implementation-defined metrics exported by the Go runtime.
pprof Package pprof writes runtime profiling data in the format expected by the pprof visualization tool.
race Package race implements data race detection logic.
trace Package trace contains facilities for programs to generate traces for the Go execution tracer.
sort Package sort provides primitives for sorting slices and user-defined collections.
strconv Package strconv implements conversions to and from string representations of basic data types.
strings Package strings implements simple functions to manipulate UTF-8 encoded strings.
sync Package sync provides basic synchronization primitives such as mutual exclusion locks.
atomic Package atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms.
syscall Package syscall contains an interface to the low-level operating system primitives.
js Package js gives access to the WebAssembly host environment when using the js/wasm architecture.
testing Package testing provides support for automated testing of Go packages.
fstest Package fstest implements support for testing implementations and users of file systems.
iotest Package iotest implements Readers and Writers useful mainly for testing.
quick Package quick implements utility functions to help with black box testing.
scanner Package scanner provides a scanner and tokenizer for UTF-8-encoded text.
tabwriter Package tabwriter implements a write filter (tabwriter.Writer) that translates tabbed columns in input into properly aligned text.
template Package template implements data-driven templates for generating textual output.
parse Package parse builds parse trees for templates as defined by text/template and html/template.
time Package time provides functionality for measuring and displaying time.
tzdata Package tzdata provides an embedded copy of the timezone database.
unicode Package unicode provides data and functions to test some properties of Unicode code points.
utf16 Package utf16 implements encoding and decoding of UTF-16 sequences.
utf8 Package utf8 implements functions and constants to support text encoded in UTF-8.
unsafe Package unsafe contains operations that step around the type safety of Go programs.

Third party ▾

Name Synopsis
goldmark Package goldmark implements functions to convert markdown text to a desired format.
ast Package ast defines AST nodes that represent markdown elements.
ast Package ast defines AST nodes that represents extension's elements
parser Package parser contains stuff that are related to parsing a Markdown text.
renderer Package renderer renders the given AST to certain formats.
util Package util provides utility functions for the goldmark.
gosumcheck Gosumcheck checks a go.sum file against a go.sum database server.
modfile Package modfile implements a parser and formatter for go.mod files.
module Package module defines the module.Version type along with support code.
semver Package semver implements comparison of semantic version strings.
sumdb Package sumdb implements the HTTP protocols for serving or accessing a module checksum database.
dirhash Package dirhash defines hashes over directory trees.
note Package note defines the notes signed by the Go module database server.
storage Package storage defines storage interfaces for and a basic implementation of a checksum database.
tlog Package tlog implements a tamper-evident log used in the Go module go.sum database server.
zip Package zip provides functions for creating and extracting module zip files.
cpu Package cpu implements processor feature detection for various CPU architectures.
execabs Package execabs is a drop-in replacement for os/exec that requires PATH lookups to find absolute paths.
plan9 Package plan9 contains an interface to the low-level operating system primitives.
unix Package unix contains an interface to the low-level operating system primitives.
windows Package windows contains an interface to the low-level operating system primitives.
mkwinsyscall mkwinsyscall generates windows system call bodies
registry Package registry provides access to the Windows registry.
svc Package svc provides everything required to build Windows service.
debug Package debug provides facilities to execute svc.Handler on console.
eventlog Package eventlog implements access to Windows event log.
example Example service program that beeps.
mgr Package mgr can be used to manage Windows service programs.
parse Package parse provides support for parsing benchmark results as generated by 'go test -bench'.
blog Package blog implements a web server for articles written in present format.
atom Package atom defines XML data structures for an Atom feed.
authtest authtest is a diagnostic tool for implementations of the GOAUTH protocol described in https://golang.org/issue/26232.
cookieauth cookieauth uses a “Netscape cookie file” to implement the GOAUTH protocol described in https://golang.org/issue/26232.
gitauth gitauth uses 'git credential' to implement the GOAUTH protocol described in https://golang.org/issue/26232.
netrcauth netrcauth uses a .netrc file (or _netrc file on Windows) to implement the GOAUTH protocol described in https://golang.org/issue/26232.
benchcmp Deprecated: benchcmp is deprecated in favor of benchstat: golang.org/x/perf/cmd/benchstat
bundle Bundle creates a single-source-file version of a source package suitable for inclusion in a particular target package.
callgraph callgraph: a tool for reporting the call graph of a Go program.
compilebench Compilebench benchmarks the speed of the Go compiler.
cover Cover is a program for analyzing the coverage profiles generated by 'go test -coverprofile=cover.out'.
digraph The digraph command performs queries over unlabelled directed graphs represented in text form.
eg The eg command performs example-based refactoring.
file2fuzz file2fuzz converts binary files, such as those used by go-fuzz, to the Go fuzzing corpus format.
fiximports The fiximports command fixes import declarations to use the canonical import path for packages that have an "import comment" as defined by https://golang.org/s/go14customimport.
getgo The getgo command installs Go to the user's system.
server Command server serves get.golang.org, redirecting users to the appropriate getgo installer based on the request path.
go-contrib-init The go-contrib-init command helps new Go contributors get their development environment set up for the Go contribution process.
godex The godex command prints (dumps) exported information of packages or selected package objects.
godoc Godoc extracts and generates documentation for Go programs.
goimports Command goimports updates your Go import lines, adding missing ones and removing unreferenced ones.
gomvpkg The gomvpkg command moves go packages, updating import declarations.
gorename The gorename command performs precise type-safe renaming of identifiers in Go source code.
gotype The gotype command, like the front-end of a Go compiler, parses and type-checks a single Go package.
goyacc Goyacc is a version of yacc for Go.
guru guru: a tool for answering questions about Go source code.
serial Package serial defines the guru's schema for -json output.
html2article This program takes an HTML file and outputs a corresponding article file in present format.
present Present displays slide presentations and articles.
present2md Present2md converts legacy-syntax present files to Markdown-syntax present files.
splitdwarf Splitdwarf uncompresses and copies the DWARF segment of a Mach-O executable into the "dSYM" file expected by lldb and ports of gdb on OSX.
ssadump ssadump: a tool for displaying and interpreting the SSA form of Go programs.
stress The stress utility is intended for catching sporadic failures.
stringer Stringer is a tool to automate the creation of methods that satisfy the fmt.Stringer interface.
toolstash Toolstash provides a way to save, run, and restore a known good copy of the Go toolchain and to compare the object files generated by two toolchains.
intsets Package intsets provides Sparse, a compact and fast representation for sparse sets of int values.
copyright Package copyright checks that files have the correct copyright notices.
cover Package cover provides support for parsing coverage profiles generated by "go test -coverprofile=cover.out".
analysis Package analysis defines the interface between a modular static analysis and an analysis driver program.
analysistest Package analysistest provides utilities for testing analyzers.
multichecker Package multichecker defines the main function for an analysis driver with several analyzers.
asmdecl Package asmdecl defines an Analyzer that reports mismatches between assembly files and Go declarations.
assign Package assign defines an Analyzer that detects useless assignments.
atomic Package atomic defines an Analyzer that checks for common mistakes using the sync/atomic package.
atomicalign Package atomicalign defines an Analyzer that checks for non-64-bit-aligned arguments to sync/atomic functions.
bools Package bools defines an Analyzer that detects common mistakes involving boolean operators.
buildssa Package buildssa defines an Analyzer that constructs the SSA representation of an error-free package and returns the set of all functions within it.
buildtag Package buildtag defines an Analyzer that checks build tags.
cgocall Package cgocall defines an Analyzer that detects some violations of the cgo pointer passing rules.
composite Package composite defines an Analyzer that checks for unkeyed composite literals.
copylock Package copylock defines an Analyzer that checks for locks erroneously passed by value.
ctrlflow Package ctrlflow is an analysis that provides a syntactic control-flow graph (CFG) for the body of a function.
deepequalerrors Package deepequalerrors defines an Analyzer that checks for the use of reflect.DeepEqual with error values.
errorsas The errorsas package defines an Analyzer that checks that the second argument to errors.As is a pointer to a type implementing error.
fieldalignment Package fieldalignment defines an Analyzer that detects structs that would use less memory if their fields were sorted.
findcall Package findcall defines an Analyzer that serves as a trivial example and test of the Analysis API.
findcall The findcall command runs the findcall analyzer.
framepointer Package framepointer defines an Analyzer that reports assembly code that clobbers the frame pointer before saving it.
httpresponse Package httpresponse defines an Analyzer that checks for mistakes using HTTP responses.
ifaceassert Package ifaceassert defines an Analyzer that flags impossible interface-interface type assertions.
ifaceassert The ifaceassert command runs the ifaceassert analyzer.
inspect Package inspect defines an Analyzer that provides an AST inspector (golang.org/x/tools/go/ast/inspector.Inspector) for the syntax trees of a package.
loopclosure Package loopclosure defines an Analyzer that checks for references to enclosing loop variables from within nested functions.
lostcancel Package lostcancel defines an Analyzer that checks for failure to call a context cancellation function.
lostcancel The lostcancel command applies the golang.org/x/tools/go/analysis/passes/lostcancel analysis to the specified packages of Go source code.
nilfunc Package nilfunc defines an Analyzer that checks for useless comparisons against nil.
nilness Package nilness inspects the control-flow graph of an SSA function and reports errors such as nil pointer dereferences and degenerate nil pointer comparisons.
nilness The nilness command applies the golang.org/x/tools/go/analysis/passes/nilness analysis to the specified packages of Go source code.
pkgfact The pkgfact package is a demonstration and test of the package fact mechanism.
printf Package printf defines an Analyzer that checks consistency of Printf format strings and arguments.
reflectvaluecompare Package reflectvaluecompare defines an Analyzer that checks for accidentally using == or reflect.DeepEqual to compare reflect.Value values.
shadow Package shadow defines an Analyzer that checks for shadowed variables.
shadow The shadow command runs the shadow analyzer.
shift Package shift defines an Analyzer that checks for shifts that exceed the width of an integer.
sigchanyzer Package sigchanyzer defines an Analyzer that detects misuse of unbuffered signal as argument to signal.Notify.
sortslice Package sortslice defines an Analyzer that checks for calls to sort.Slice that do not use a slice type as first argument.
stdmethods Package stdmethods defines an Analyzer that checks for misspellings in the signatures of methods similar to well-known interfaces.
stringintconv Package stringintconv defines an Analyzer that flags type conversions from integers to strings.
stringintconv The stringintconv command runs the stringintconv analyzer.
structtag Package structtag defines an Analyzer that checks struct field tags are well formed.
tests Package tests defines an Analyzer that checks for common mistaken usages of tests and examples.
timeformat Package timeformat defines an Analyzer that checks for the use of time.Format or time.Parse calls with a bad format.
unmarshal The unmarshal package defines an Analyzer that checks for passing non-pointer or non-interface types to unmarshal and decode functions.
unmarshal The unmarshal command runs the unmarshal analyzer.
unreachable Package unreachable defines an Analyzer that checks for unreachable code.
unsafeptr Package unsafeptr defines an Analyzer that checks for invalid conversions of uintptr to unsafe.Pointer.
unusedresult Package unusedresult defines an analyzer that checks for unused results of calls to certain pure functions.
unusedwrite Package unusedwrite checks for unused writes to the elements of a struct or array object.
usesgenerics Package usesgenerics defines an Analyzer that checks for usage of generic features added in Go 1.18.
singlechecker Package singlechecker defines the main function for an analysis driver with only a single analysis.
unitchecker The unitchecker package defines the main function for an analysis driver that analyzes a single compilation unit during a build.
astutil Package astutil contains common utilities for working with the Go AST.
inspector Package inspector provides helper functions for traversal over the syntax trees of a package, including node filtering by type, and materialization of the traversal stack.
buildutil Package buildutil provides utilities related to the go/build package in the standard library.
callgraph Package callgraph defines the call graph and various algorithms and utilities to operate on it.
cha Package cha computes the call graph of a Go program using the Class Hierarchy Analysis (CHA) algorithm.
rta This package provides Rapid Type Analysis (RTA) for Go, a fast algorithm for call graph construction and discovery of reachable code (and hence dead code) and runtime types.
static Package static computes the call graph of a Go program containing only static call edges.
vta Package vta computes the call graph of a Go program using the Variable Type Analysis (VTA) algorithm originally described in “Practical Virtual Method Call Resolution for Java," Vijay Sundaresan, Laurie Hendren, Chrislain Razafimahefa, Raja Vallée-Rai, Patrick Lam, Etienne Gagnon, and Charles Godin.
cfg Package cfg constructs a simple control-flow graph (CFG) of the statements and expressions within a single function.
expect Package expect provides support for interpreting structured comments in Go source code as test expectations.
gccgoexportdata Package gccgoexportdata provides functions for reading export data files containing type information produced by the gccgo compiler.
gcexportdata Package gcexportdata provides functions for locating, reading, and writing export data files containing type information produced by the gc compiler.
loader Package loader loads a complete Go program from source code, parsing and type-checking the initial packages plus their transitive closure of dependencies.
packages Package packages loads Go packages for inspection and analysis.
gopackages The gopackages command is a diagnostic tool that demonstrates how to use golang.org/x/tools/go/packages to load, parse, type-check, and print one or more Go packages.
packagestest Package packagestest creates temporary projects on disk for testing go tools on.
pointer Package pointer implements Andersen's analysis, an inclusion-based pointer analysis algorithm first described in (Andersen, 1994).
ssa Package ssa defines a representation of the elements of Go programs (packages, types, functions, variables and constants) using a static single-assignment (SSA) form intermediate representation (IR) for the bodies of functions.
interp Package ssa/interp defines an interpreter for the SSA representation of Go programs.
objectpath Package objectpath defines a naming scheme for types.Objects (that is, named entities in Go programs) relative to their enclosing package.
typeutil Package typeutil defines various utilities for types, such as Map, a mapping from types.Type to interface{} values.
vcs Package vcs exposes functions for resolving import paths and using version control systems, which can be used to implement behavior similar to the standard "go get" command.
godoc Package godoc is a work-in-progress (2013-07-17) package to begin splitting up the godoc binary into multiple pieces.
analysis Package analysis performs type and pointer analysis and generates mark-up for the Go source view.
redirect Package redirect provides hooks to register HTTP handlers that redirect old godoc paths to their new equivalents.
static Package static exports a map of static file content that supports the godoc user interface.
util Package util contains utility types and functions for godoc.
vfs Package vfs defines types for abstract file system access and provides an implementation accessing the file system of the underlying OS.
gatefs Package gatefs provides an implementation of the FileSystem interface that wraps another FileSystem and limits its concurrency.
httpfs Package httpfs implements http.FileSystem using a godoc vfs.FileSystem.
mapfs Package mapfs file provides an implementation of the FileSystem interface based on the contents of a map[string]string.
zipfs Package zipfs file provides an implementation of the FileSystem interface based on the contents of a .zip file.
gopls Gopls (pronounced “go please”) is an LSP server for Go.
doc Command generate creates API (settings, etc) documentation in JSON and Markdown for machine and human consumption.
imports Package imports implements a Go pretty-printer (like package "go/format") that also adds or removes import statements as necessary.
playground Package playground registers an HTTP handler at "/compile" that proxies requests to the golang.org playground service.
socket Package socket implements an WebSocket-based playground backend.
present Package present implements parsing and rendering of present files, which can be slide presentations as in golang.org/x/tools/cmd/present or articles as in golang.org/x/blog (the Go blog).
eg Package eg implements the example-based refactoring tool whose command-line is defined in golang.org/x/tools/cmd/eg.
importgraph Package importgraph computes the forward and reverse import dependency graphs for all packages in a Go workspace.
rename Package rename contains the implementation of the 'gorename' command whose main function is in golang.org/x/tools/cmd/gorename.
satisfy Package satisfy inspects the type-checked ASTs of Go packages and reports the set of discovered type constraints of the form (lhs, rhs Type) where lhs is a non-trivial interface, rhs satisfies this interface, and this fact is necessary for the package to be well-typed.
txtar Package txtar implements a trivial text-based file archive format.

Other packages


These packages are part of the Go Project but outside the main Go tree. They are developed under looser compatibility requirements than the Go core. Install them with "go get".


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