Open-source error-handling software

204 open-source libraries, tools and applications tagged error-handling, ranked by how closely error-handling is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.

204 products, primary matches first, then adoption-weighted; health v2 shown.

Product	Health v2	Stars	Maturity
go-playground/validator A Go library for validating structs and individual fields using struct tags, with support for cross-field, cross-struct, and nested map/sli…	94	20197	stable
abseil/abseil-cpp Abseil is an open-source collection of C++17-compliant libraries drawn from Google's internal codebase, designed to augment the C++ standar…	92	18158	stable
yoavbls/pretty-ts-errors A VSCode extension that reformats TypeScript error messages into prettier, human-readable output with syntax highlighting. It supports Type…	77	14096	active
filp/whoops Whoops is a PHP error handling library that provides a stack-based system for dealing with errors and exceptions. It renders a detailed, pr…	76	13229	stable
jd/tenacity Tenacity is a general-purpose retrying library for Python that simplifies adding retry behavior to functions and code blocks. It supports c…	95	8807	stable
bvaughn/react-error-boundary A reusable React error boundary component that catches rendering errors and displays fallback UI. It supports all React renderers including…	99	7993	stable
supermacro/neverthrow neverthrow is a TypeScript library providing a type-safe Result type (Ok/Err) for error handling without exceptions, inspired by Rust. It i…	56	7727	active
webmozarts/assert A PHP library providing efficient assertions for validating method input and output, throwing InvalidArgumentException with clear, consiste…	92	7649	stable
microsoft/GSL Microsoft's implementation of the Guidelines Support Library (GSL), a header-only C++14 library of types and functions recommended by the C…	87	6722	stable
dtolnay/anyhow A Rust library providing anyhow::Error, a trait-object-based concrete error type for idiomatic error handling in applications. It supports …	94	6677	stable
Arrow Arrow is a Kotlin library for typed functional programming, providing data types like Option and Either, typed error handling with the Rais…	88	6581	active
ACRA ACRA is an open-source Android library for crash reporting that catches uncaught exceptions, collects detailed device and application conte…	87	6503	active
donlon/cloudflare-error-page A generator and library for creating customized error pages that mimic the well-known Cloudflare error page, embeddable into your own websi…	54	5788	active
dtolnay/thiserror A Rust library providing a convenient derive macro for implementing the standard library's std::error::Error trait on structs and enums. It…	98	5573	stable
Qix-/better-exceptions A Python library that automatically replaces the default exception output with pretty, colorized, and more informative tracebacks that incl…	60	4718	active
nunomaduro/collision Collision is a PHP library that provides beautiful, readable error reporting for command-line applications. Built on top of Whoops, it is b…	72	4658	active
zio/zio ZIO is a zero-dependency Scala library for type-safe, composable asynchronous and concurrent programming, built on lightweight fibers. It p…	95	4428	stable
dry-python/returns A Python library providing typed functional programming primitives like Result, Maybe, and IO containers with full mypy support and a custo…	87	4378	active
failsafe-lib/failsafe Failsafe is a lightweight, zero-dependency Java library for fault tolerance, wrapping executable logic with composable resilience policies …	55	4313	active
bombela/backward-cpp Backward-cpp is a header-only C++ library that pretty-prints stack traces with source code snippets when crashes or fatal errors occur. It …	26	4305	stable
cenkalti/backoff A Go library implementing the exponential backoff algorithm with a Retry helper for retrying operations. It supports configurable retry lim…	76	4085	stable
mcintyre321/OneOf OneOf is a C# library providing F#-style discriminated unions via a generic OneOf<T0,...,Tn> type with exhaustive compile-time matching. It…	68	4055	active
iqiyi/xCrash xCrash is an Android library that captures Java crashes, native crashes, and ANRs, generating tombstone files with detailed process, thread…	32	3954	active
.NET Community Toolkit A collection of NuGet libraries from Microsoft and the .NET Foundation providing UI-agnostic helpers for .NET developers, including the MVV…	63	3762	stable
maruel/panicparse panicparse is a Go tool and library that parses Go panic stack traces, densifies and deduplicates goroutines with similar stacks, and rende…	68	3707	stable
sony/gobreaker gobreaker is a Go library implementing the Circuit Breaker pattern as a generic, configurable state machine. It prevents sending requests l…	58	3700	stable
kriskowal/q Q is a JavaScript promise library implementing the Promises/A+ specification for asynchronous flow control in Node.js and browsers. It pred…	10	14995	maintenance
Suor/funcy Funcy is a Python library providing a practical collection of functional programming tools inspired by Clojure and Underscore. It offers ut…	76	3511	stable
Interactor A Ruby gem providing a common interface for encapsulating business logic in single-purpose objects called interactors. Each interactor oper…	43	3456	stable
samber/mo samber/mo is a Go library providing monads and functional programming abstractions such as Option, Result, Either, Future, IO, Task, and St…	87	3421	stable
mxcl/PromiseKit PromiseKit is a Swift and Objective-C library implementing promises to simplify asynchronous programming. It supports iOS, macOS, tvOS, wat…	57	14220	maintenance
scopsy/await-to-js await-to-js is a tiny TypeScript utility library that wraps promises in an async/await-friendly helper, returning [error, data] tuples inst…	32	3357	stable
ardalis/GuardClauses A small, extensible C# library providing guard clause extension methods for fail-fast argument validation. It offers checks like null, empt…	66	3314	stable
android-notes/Cockroach Cockroach is an Android library (Java) that prevents unnecessary app crashes by intercepting exceptions thrown in the main thread's message…	23	3252	stable
microsoft/plcrashreporter PLCrashReporter is an open-source in-process crash reporting library for iOS, macOS, and tvOS written in Objective-C. It detects crashes an…	56	3070	stable
sanctuary-js/sanctuary Sanctuary is a JavaScript functional programming library inspired by Haskell and PureScript, offering a stricter, safer alternative to Ramd…	23	3050	stable
microsoft/wil A header-only C++ library from Microsoft providing readable, type-safe C++ interfaces for common Windows coding patterns. It includes RAII …	73	2979	stable
avast/retry-go A simple Go library providing a retry mechanism for retrying failing operations with configurable attempts, delays, and backoff strategies.…	70	2965	stable
hapijs/boom @hapi/boom is a Node.js library for creating HTTP-friendly error objects with status codes, payloads, and formatting helpers. It is part of…	62	2922	stable
onelivesleft/PrettyErrors A Python library that reformats exception tracebacks into readable, colorized output. It can be installed globally via the Python startup p…	32	2872	stable
benaadams/Ben.Demystifier A high-performance .NET library that renders stack traces with modern C# 7.0+ features (async, lambdas, generics, iterators) in a format th…	23	2862	stable
gcanti/fp-ts fp-ts is a library for typed functional programming in TypeScript, providing popular data types (Option, Either, IO, Task), type classes (F…	54	11548	maintenance
vkhorikov/CSharpFunctionalExtensions A C# library providing functional programming extensions, including Result and Maybe monads, value objects, and fluent method chaining. It …	66	2831	stable
litl/backoff A Python library providing function decorators for configurable backoff and retry logic. It supports both synchronous functions and asyncio…	10	2695	stable
symfony/error-handler The Symfony ErrorHandler component provides tools to manage errors and ease debugging PHP code, converting PHP errors and notices into exce…	98	2672	stable
schmittjoh/php-option A PHP library implementing the Option type (Some/None) to represent optional values instead of returning null. It forces developers to expl…	85	2667	stable
altmann/FluentResults FluentResults is a lightweight .NET library implementing the Result pattern, returning success/failure objects instead of throwing exceptio…	33	2642	active
zkat/miette miette is a Rust diagnostic library that extends std::error::Error with a Diagnostic protocol, derive macros, and pretty, detailed error re…	59	2614	stable
kisielk/errcheck errcheck is a static analysis tool for Go that finds silently ignored error return values. It can be run as a CLI or integrated via the go/…	91	2531	active
Safe PHP Safe-PHP redeclares PHP core functions in a Safe namespace so they throw exceptions instead of returning false on error. It also provides S…	83	2496	active
fluture-js/Fluture Fluture is a Fantasy Land compliant, monadic alternative to JavaScript Promises, representing asynchronous operations as lazy, composable F…	23	2491	stable
cockroachdb/errors A Go error handling library that is a drop-in replacement for the standard errors package and github.com/pkg/errors, adding network-portabl…	80	2475	active
Exceptionless Exceptionless is an open-source real-time error monitoring and reporting service for .NET, JavaScript, and Node applications, with clients …	98	2457	active
beberlei/assert A thin PHP assertion library providing assertions and guard methods for input validation in business models, libraries, and low-level appli…	72	2434	stable
eapache/go-resiliency A Go library implementing common resiliency patterns such as circuit breaker, retrier, deadline/timeout, batching, and semaphore. It is ins…	23	2368	stable
armink/CmBacktrace CmBacktrace is an open-source C library for ARM Cortex-M microcontrollers that automatically diagnoses faults (Hard Fault, Bus Fault, etc.)…	70	2185	stable
zesterer/ariadne Ariadne is a Rust crate for producing fancy, colored compiler diagnostics and error reports with inline and multi-line labels, multi-file e…	10	2156	active
pkg/errors A Go library providing simple error handling primitives, most notably errors.Wrap for adding context and stack traces to errors without des…	52	8254	maintenance
symfony/deprecation-contracts A minimal PHP package providing a single global `trigger_deprecation()` function and convention for emitting deprecation notices from libra…	88	2099	stable
error-or/error-or ErrorOr is a C# library providing a fluent discriminated union type of either an error or a result value, letting developers replace except…	91	2095	active
liangjingkanji/Net Net is a coroutine-based Android networking library built on top of OkHttp, offering a non-intrusive API that supports all OkHttp features …	34	2035	active
IBM/fp-go IBM/fp-go is a functional programming library for Go 1.24+ inspired by fp-ts, providing monads like Option, Either, Result, IO, and Reader,…	92	2033	active
softonic/axios-retry An Axios plugin that intercepts failed HTTP requests and automatically retries them with configurable retry counts and delay strategies. It…	41	2015	active
dmmulroy/better-result A lightweight TypeScript library providing a typed Result<T, E> type that makes expected failures explicit in function signatures. It suppo…	76	1995	active
facebookarchive/KVOController A thread-safe Objective-C library that simplifies Cocoa's key-value observing (KVO) on iOS and OS X. It offers a modern API supporting bloc…	10	7275	maintenance
shepmaster/snafu SNAFU is a Rust library for ergonomically creating domain-specific error types and attaching context to underlying errors. It uses a derive…	70	1899	stable
HugoRCD/evlog evlog is a modern TypeScript logging library that combines structured logs, wide events, and structured errors behind a single API and drai…	79	1888	active
TartanLlama/expected A single-header C++11/14/17 implementation of std::expected with functional-style extensions like map, and_then, and or_else. It lets devel…	48	1887	stable
orangeduck/Cello Cello is a C library that adds a higher-level runtime system to C, providing generic data structures, polymorphism, interfaces/type classes…	23	7131	maintenance
ruby/did_you_mean A Ruby gem that enhances error messages by suggesting corrections for misspelled method, variable, class, and key names in NameError, NoMet…	59	1881	stable
destel/rill Rill is a Go library providing composable, channel-based concurrency primitives built on generics. It lets developers build concurrent pipe…	83	1880	active
alexreardon/tiny-invariant A tiny, zero-dependency invariant assertion function for JavaScript and TypeScript that throws when a condition is falsy. It also narrows t…	23	1863	stable
doctrine/deprecations A thin PHP library that wraps deprecation notification strategies, supporting trigger_error(E_USER_DEPRECATED), PSR-3 logging, and silent t…	66	1855	stable
rust-cli/human-panic A Rust library that installs a custom panic hook to replace cryptic panic messages with friendly, human-readable crash output. It generates…	75	1852	stable
TheCodeTraveler/AsyncAwaitBestPractices A .NET library providing extensions for System.Threading.Tasks.Task and ValueTask, including SafeFireAndForget for exception-safe fire-and-…	70	1841	stable
Nette Framework Tracy is a PHP debugging library that provides error visualization, variable dumping, logging, and a floating debug bar (Tracy Bar) showing…	88	1837	stable
connor4312/cockatiel Cockatiel is a TypeScript/Node.js resilience and transient-fault-handling library inspired by .NET's Polly. It lets developers compose poli…	67	1829	active
BetterErrors/better_errors Better Errors is a Ruby gem that replaces the standard Rails error page with a richer, more useful one, and works as Rack middleware in any…	23	6858	maintenance
rotisserie/eris Eris is a Go error handling library providing readable stack traces, error wrapping, and flexible output formatting including JSON. It inte…	35	1794	stable
eyre eyre is a Rust library providing eyre::Report, a trait-object based error handling type for idiomatic error handling and reporting in appli…	72	1785	stable
skydoves/sandwich Sandwich is a lightweight Kotlin library that provides sealed ApiResponse types for modeling and handling API responses and exceptions from…	91	1779	stable
fullstack-build/tslog tslog is a universal, fully typed logging library for TypeScript and JavaScript that runs in Node.js, browsers, Deno, Bun, workers, and Rea…	97	1744	active
Giorgi/EntityFramework.Exceptions A .NET library that converts Entity Framework Core's generic DbUpdateException into strongly typed exceptions like UniqueConstraintExceptio…	75	1737	active
oklog/run run.Group is a small Go library providing a universal mechanism to manage goroutine lifecycles. Actors are added as execute/interrupt funct…	32	1721	stable
nodeshift/opossum Opossum is a Node.js circuit breaker library that wraps asynchronous functions (promises and callbacks) and monitors their execution, faili…	90	1689	active
foonathan/type_safe A C++ library providing zero-overhead abstractions that leverage the type system to prevent bugs at compile time. It offers improved wrappe…	40	1650	active
gigobyte/purify Purify is a functional programming library for TypeScript providing algebraic data types like Maybe, Either, and Result, plus runtime type …	57	1608	active
jshttp/http-errors http-errors is a Node.js library for creating HTTP error objects with status codes, messages, and custom properties. It integrates easily w…	61	1561	stable
niieani/bash-oo-framework Bash Infinity is a standard library and boilerplate framework for writing Bash scripts, bringing concepts like OOP, try-catch exceptions, n…	23	5619	maintenance
Shopify/semian Semian is a Ruby resiliency library that prevents cascading failures when accessing slow or unresponsive external services like databases a…	84	1489	stable
ehmicky/modern-errors A JavaScript library for handling errors in a simple, stable, and consistent way across Node.js and browsers. It provides error class creat…	80	1487	stable
jeremy-rifkin/cpptrace Cpptrace is a simple, portable, self-contained C++ stacktrace library supporting C++11 and newer on Linux, macOS, and Windows (including Mi…	60	1482	active
ajalt/fuckitpy FuckIt.py is a Python library that silences errors by rewriting code via AST manipulation so scripts keep running despite exceptions. It ca…	32	5295	maintenance
hynek/stamina stamina is an opinionated Python library for retrying failed operations with production-safe defaults like exponential backoff with jitter,…	79	1461	stable
dry-rb/dry-validation dry-validation is a Ruby library for data validation using type-safe schemas and composable rules. It supports input coercion, nested data,…	78	1423	active
thejerf/suture Suture is a Go library implementing Erlang-style supervisor trees for managing and restarting failing goroutine-based services. It handles …	70	1411	stable
vultix/ts-results A TypeScript library implementing Rust's Result and Option types, bringing compile-time error checking and explicit optional values to Type…	32	1409	stable
true-myth/true-myth True Myth is a TypeScript library providing type-safe Maybe, Result, and Task types for handling null values, errors, and async operations …	91	1365	active
simplepeng/SpiderMan An Android library that displays crash/exception information directly on the device in a dialog, with options to share the stack trace. It …	43	1313	stable
cknd/stackprinter A Python library that produces enhanced exception tracebacks showing source code context and the current values of nearby variables. It pri…	65	1300	stable