JSPM

Small package to encode or decode IP addresses from buffers to strings.

A robust base64 encoder/decoder that is fully compatible with `atob()` and `btoa()`, written in JavaScript.

A pure javascript JPEG encoder and decoder

Decode audio data in node or browser

Lightweight tiff decoder

Snappy codec for KafkaJS

Module for serializing and unserializing SocketCluster messages

utf8 to/from bytes codec (esm/cjs)

Check details of an mp4 file, e.g. to determine if transcoding is required

LZ4 compression codec for the KafkaJS library

snappy decompressor for wasm

A-Law and mu-Law codecs in JavaScript.

A robust windows-1252 encoder/decoder written in JavaScript.

base64 to/from bytes codec (esm/cjs)

A JSON decoding library for Typescript

A robust windows-874 encoder/decoder written in JavaScript.

Snappy codec for kafkajs in typescript

Encoding/Decoding to/from JSON/CBOR/MsgPack

A robust iso-8859-15 encoder/decoder written in JavaScript.

A robust windows-1257 encoder/decoder written in JavaScript.

A robust windows-1256 encoder/decoder written in JavaScript.

A robust windows-1253 encoder/decoder written in JavaScript.

A robust iso-8859-8-i encoder/decoder written in JavaScript.

A robust iso-8859-2 encoder/decoder written in JavaScript.

A robust iso-8859-8 encoder/decoder written in JavaScript.

A robust iso-8859-3 encoder/decoder written in JavaScript.

A robust windows-1255 encoder/decoder written in JavaScript.

A robust windows-1251 encoder/decoder written in JavaScript.

A robust iso-8859-6 encoder/decoder written in JavaScript.

A robust macintosh encoder/decoder written in JavaScript.

A robust windows-1250 encoder/decoder written in JavaScript.

A robust windows-1258 encoder/decoder written in JavaScript.

A robust iso-8859-7 encoder/decoder written in JavaScript.

Support as many legacy encodings as possible

MP3 encoder extension for Mediabunny, based on LAME.

A robust iso-8859-5 encoder/decoder written in JavaScript.

A robust windows-1254 encoder/decoder written in JavaScript.

A robust koi8-r encoder/decoder written in JavaScript.

A robust x-mac-cyrillic encoder/decoder written in JavaScript.

A robust iso-8859-4 encoder/decoder written in JavaScript.

Ascii85 (a.k.a. base85) encoding/decoding.

UCAN codec for IPLD

WebAssembly media player using Ogg/Vorbis/Theora/Opus/WebM libs compiled with Emscripten

ucanto core

UCAN RPC Client

ucanto transport

IMA ADPCM codec in JavaScript.

Convert and discover properties of CIDs

A library for lexicographical encoding.

Minimalistic yet feature-rich IO decoding and encoding

LZ4 streaming compression and decompression library for KafkaJS

A minimal yet complete MessagePack implementation for JavaScript

Cross-platform standard library for WeChat minigame and web browsers with unified APIs for crypto, fs, fetch, storage, and more.

LZ4 compression codec for the KafkaJS library

Oxipng image encoder in WebAssembly

FLAC data stream encoder and decoder compiled in JavaScript using emscripten.

Detect audio and video features in browser

Encode and Decode an XRPL account address and destination tag to/from X-formatted (tagged) address

Zod <=> Convex integration, supporting Zod 4

Pure JS Kafka LZ4 codec for kafkajs

Compression codec for uuid to d64 (22 bytes)

Codec to encrypt any javascript value into a JsonWebEncryption (JWE)

MozJPEG image encoder in WebAssembly

type-safe base45 encoder and decoder

Gifsicle codec in WebAssembly.

Blockchain Commons Deterministic CBOR (dCBOR) for TypeScript

Tencent silk encoder for Node.js and browser

adeunis codecs source

JSON:API v1.0 codec for encoding/decoding API responses

'codecs' compatible base32-encode and base32-decode adapter.

A library to encode/decode objects to/from links notation

Encodes and decodes AVIF images using WebAssembly

A library for making type-safe HTTP requests built on the popular Axios client.

A library for defining codecs that can safely translate between runtime and over-the-wire types, helping you build more robust systems in TypeScript.

A module for statically defining type-safe HTTP operations. These can be leveraged by other modules to build type-safe clients or servers that can execute the requests.

Minimal binary codec for SC based on MessagePack

Convert a webm video to mp4.

A pure javascript JPEG encoder and decoder

atproto timestamp identifier codec library

A streaming JPEG encoder and decoder

A streaming PNG encoder and decoder

Useful JS utilities.

Z85 - ZeroMQ's ascii85 encoding format

Encode a string into a phonetic code with the Double Metaphone algorithm

Checks if a codec is supported by WebRTC stack in browser

Node-API bindings for SpanDSP G.722 (encode/decode) with ESM+CJS loaders.

This plugin for [graphql code generator](https://graphql-code-generator.com) generates types and runtime codecs for a given GraphQL Schema using [io-ts](https://github.com/gcanti/io-ts) to give runtime type safety.

Full native ffmpeg bindings for Node.js with Streams support

Incremental I/O; functional parsers and writers; display, debug, and diagnostic formatters; and Unicode and binary codecs

Common Database for Bajo Framework

WebAssembly build of CharLS - High-performance JPEG-LS codec for browsers and Node.js

A full-featured, cross-platform FFmpeg wrapper for Node.js with TypeScript support

Includes parser, serializer & generated typings

Canonical Sideband wire contract: branded IDs, protocol constants/error codes, frame + handshake shapes, and binary codec. No I/O, runtime logic, or transport definitions.

Defines base types and interfaces

Low-level tools to perform serialization and deserialization via SCALE spec

Encodes and decodes WebP images using WebAssembly

Msgpack codec for delta-crdts

Universal library for decoding and encoding bencode data

Worker-pool-accelerated get/set for zarrita.js — offloads codec encode/decode to Web Workers.

Fast, optimized, and compatible base-x encoding/decoding library.

Loads and resizes images using WebAssembly

Runtime for compiled result from @scale-codec/definition-compiler

A library for decoding JSON in JS

Zod codec helpers for @kafkats/client.

A robust windows-1252 encoder/decoder written in JavaScript.

Decoding library for Atim products

Serialization codecs for Procwire binary protocol.

wav-blob-util is a utility library that converts audio blobs to the Wave format with clamping samples onto the 16-bit resolution.

A MozJPEG encoder in WebAssembly

Native G.711 µ-law decoder for Node.js. Optimized C++/N‑API binding for minimal overhead and maximum throughput.

abstract error class with error code supports to create error class quickly

BigInt base62 codec

io-ts types for making parsers

An Ogg demuxer for aurora.js

Real-Time GPU Texture Codecs for the Web

Testing audio and video codec support in a browser with or without a key system

io-ts datetime types with luxon

jsZ85 provides an implementation of the Z85 codec following the specs of https://rfc.zeromq.org/spec/32/. It is a port of the https://github.com/ruben-viscomi/ktZ85 implementation for Kotlin.

A robust iso-8859-10 encoder/decoder written in JavaScript.

A base64 implementation compiled to WASM format

WebAssembly audio converter for the flo™ audio format

Gifsicle codec in WebAssembly.

The official encoder/decoder for the flo™ audio format

Tiny TypeScript key codec for DynamoDB PK/SK patterns (ENTITY#id...)

Gifsicle codec in WebAssembly.

A Vorbis audio decoder for aurora.js ported using emscripten

Download a Chromium all-codecs+ woolyss binary

A robust iso-8859-2 encoder/decoder written in JavaScript.

XSalsa20 Poly1305 codec that implements the abstract-encoding interface.

Oxipng image encoder in WebAssembly

A React Native library for intelligent video processing with native performance. Supports video analysis, quality-preserving format conversion, and smart recompression with customizable settings.

An Opus audio decoder for aurora.js ported using emscripten

Spacemesh Transaction Codec library

MozJPEG image encoder in WebAssembly

XSalsa20 codec that implements tha abstract-encoding interface.

ascii - ebcdic conversion module

Remove a codec from a Session Description.

Minimal Protocol Buffers wire encoding/decoding

Node-RED node for adeunis-codecs v1.7.x library

Minimal Protocol Buffers wire encoding/decoding

encode decode base58 SWTC identifiers

Small package to encode or decode IP addresses from buffers to strings.

For checking video codecs and then use in video.canPlayType()

Compression codec for uuid to base91 in less than 20 bytes

Zero dependencies, small, fast, vanilla TypeScript object serializer with very compact binary format that is also quite compressible via lz4 and deflate

RFC 7845-compliant Ogg/Opus decoder for WebAssembly with multichannel support

Statlana DTA codec module (reserved stub)

Utility for encoding and decoding PEM ascii-armoured data streams

encode decode base58 SWTC identifiers

The abstract codec class to encode/decode buffer/string.

Get metadata of audio files from disk or URLS

A robust iso-8859-13 encoder/decoder written in JavaScript.

Per-feature adapters around Squoosh codecs, worker/client runtimes.

A robust koi8-u encoder/decoder written in JavaScript.

A robust iso-8859-14 encoder/decoder written in JavaScript.

Download a Chromium all-codecs+ woolyss binary

X flexible Configurations for Nodejs

PDU builder/parser

Codec errors for JavaScript

Gifsicle codec in WebAssembly.

Codecs for encoding arbitrary state trees into URL parameters and back again.

Decoder for .bik (Bink) video files.

A robust iso-8859-16 encoder/decoder written in JavaScript.

An ATRAC1 audio codec implementation in JS

Base16 encoder/decoder for JavaScript

ASCII encoder/decoder for JavaScript

A steganographic encoder and decoder built on top of a jpeg library.

Convert between JavaScript UCS-2-encoded strings and OCaml-friendly UTF-8 byte-arrays

Convert a webm video to mp4.

Encoder and Decoder for gitfile streams for js-git.

add the encoding ability to abstract-nosql database.

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One function. Both directions. Zero duplication. Bidirectional functions for TypeScript.

A pure javascript JPEG encoder and decoder

Polymorphic value conversion engine - transform values between multiple representations while preserving semantic identity

TypeScript implementation of the JAM codec

String serialization of arbitrarily complex structures that sort bytewise.

Decode audio data in node or browser

Cartesi Machine Input/Output Codec

LZ4 compression codec for JS.

codecs compatible de-/encoder for bigints.

Transform arbitrary object structures (json superset) in to JsonML/PigeonMark and back again, allowing arbitrary data to be passed through XML tools

Utils functions for Thrift TypeScript

Multibase, multicodec, multikey, base64url, and JSON canonicalization utilities for Me Protocol key encoding, DID parsing, and credential serialization.

Simple config handling for app or module

silk codec bindings for Node.js

ucanto transport

X11 Properties Coder / Encoder

Simple ffmpeg API for nodejs

A robust windows-1251 encoder/decoder written in JavaScript.

A robust ibm866 encoder/decoder written in JavaScript.

固定长度字符串协议编解码器，支持 bool/enum/number/string 类型，适用于物联网设备协议解析

Module for serializing and unserializing SocketMesh messages.

Bindings for Valve's LZSS compression codec

TENC (Token Efficient Nested Codec) parser, validator, repair, and converters.

Angular directives for HTML5 audio/video media events

Codec for validator presets

A JavaScript implementation of the 8b10b line codec

intel HEX format codec

A comprehensive, type-safe data encoding, serialization, and utility library for JavaScript and TypeScript

YouTube Audio Downloader

A picture is worth a thousand words... Literally! Encoding and transfer data through images

A tiny, zero-dependency TypeScript validation library. Competitive alternative to Zod with clearer API, solving real pain points like circular validation, codecs, and mixed async/sync validation.

Check if the given audio format is supported on the browser, and return the compatibility level as a number

ucanto core

A robust windows-1251 encoder/decoder written in JavaScript.

Micropackage: convert between a NodeJS Buffer and a base64-encoded string with optional URL-safe alphabet, padding, and MultiBase prefix.

CLI to encode/decode common formats such as JWT, Base64, Hex, ASCII, Binary

Codecs for purescript argonaut

Agence Javascript Library

Axon msgpack codec

commandline interface for mplayer that manages movie files

Read and Write Life-Like Cellular Automata Files

ipfs protobuf codec

Stream implementation of a protobuf message encoder/decoder.

JavaScript Opus (audio format) Encoder (front-end package only)

8-bit, structured, binary message codec

Opus codec ported with emscripten, supports PCM in 32-bits Float format. Useful for Web Audio AudioWorkletProcessor

A TypeScript library for typed key-value storage with support for various codecs and storage adapters.

A stub for codec such as JsonCodec

A git http platform implementation that sits on top of a tcp connection

A pkt-line codec packaged as a min-stream push-filter.

Scope a pipe-segment-codec.

LoRaWAN Codec API compliant codec for BresserWeatherSensorLW

Escaped Base64 codec

Snappy codec for snappy-cache

TypeScript library offering robust contracts for encoding and decoding values with strong type safety.

Simple and extensible JavaScript value validator and transformer.

Download Device Repository files so you can fill them with your device information

A varint implementation compiled to WASM format

UCAN RPC

Module for serializing and deserializing Zation messages

An alternative encoding/decoding scheme for IOTA trytes supporting UTF-8 and JSON

Motion Twin Codec port in JS

UCAN RPC Client

Cartesi Machine Input/Output Codec CLI

Minimal binary codec for SocketCluster based on pbf

Legible Encoding for Addressable Packets

Codec Engine Kernel Runtime

Runtime codec implementation for ZenithKernel framework

High-throughput JPEG 2000 (Rec. ITU-T T.814 | ISO/IEC 15444-15) decoder

TypeScript library providing a set of contracts for encoding and decoding values in a strongly-typed way.

Structured JSON encoding and validation

CBOR encoding and decoding utilities for ME Protocol, DID:ME, and credential serialization.

A simple CLI tool to get a video's MIME string including relevant codes for use with MediaSource Extension.

Z85 encoding/decoding

pipe segment codec

'probably' => 2, 'maybe' => 1, '' => 0

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