--- title: emulatorjs --- # [linuxserver/emulatorjs](https://github.com/linuxserver/docker-emulatorjs) [![Scarf.io pulls](https://scarf.sh/installs-badge/linuxserver-ci/linuxserver%2Femulatorjs?color=94398d&label-color=555555&logo-color=ffffff&style=for-the-badge&package-type=docker)](https://scarf.sh/gateway/linuxserver-ci/docker/linuxserver%2Femulatorjs) [![GitHub Stars](https://img.shields.io/github/stars/linuxserver/docker-emulatorjs.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&logo=github)](https://github.com/linuxserver/docker-emulatorjs) [![GitHub Release](https://img.shields.io/github/release/linuxserver/docker-emulatorjs.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&logo=github)](https://github.com/linuxserver/docker-emulatorjs/releases) [![GitHub Package Repository](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=GitHub%20Package&logo=github)](https://github.com/linuxserver/docker-emulatorjs/packages) [![GitLab Container Registry](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=GitLab%20Registry&logo=gitlab)](https://gitlab.com/linuxserver.io/docker-emulatorjs/container_registry) [![Quay.io](https://img.shields.io/static/v1.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=linuxserver.io&message=Quay.io)](https://quay.io/repository/linuxserver.io/emulatorjs) [![Docker Pulls](https://img.shields.io/docker/pulls/linuxserver/emulatorjs.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=pulls&logo=docker)](https://hub.docker.com/r/linuxserver/emulatorjs) [![Docker Stars](https://img.shields.io/docker/stars/linuxserver/emulatorjs.svg?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=stars&logo=docker)](https://hub.docker.com/r/linuxserver/emulatorjs) [![Jenkins Build](https://img.shields.io/jenkins/build?labelColor=555555&logoColor=ffffff&style=for-the-badge&jobUrl=https%3A%2F%2Fci.linuxserver.io%2Fjob%2FDocker-Pipeline-Builders%2Fjob%2Fdocker-emulatorjs%2Fjob%2Fmaster%2F&logo=jenkins)](https://ci.linuxserver.io/job/Docker-Pipeline-Builders/job/docker-emulatorjs/job/master/) [![LSIO CI](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=CI&query=CI&url=https%3A%2F%2Fci-tests.linuxserver.io%2Flinuxserver%2Femulatorjs%2Flatest%2Fci-status.yml)](https://ci-tests.linuxserver.io/linuxserver/emulatorjs/latest/index.html) [Emulatorjs](https://github.com/linuxserver/emulatorjs) - In browser web based emulation portable to nearly any device for many retro consoles. A mix of emulators is used between Libretro and EmulatorJS. [![emulatorjs](https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/emulatorjs-logo.png)](https://github.com/linuxserver/emulatorjs) ## Supported Architectures We utilise the docker manifest for multi-platform awareness. More information is available from docker [here](https://distribution.github.io/distribution/spec/manifest-v2-2/#manifest-list) and our announcement [here](https://blog.linuxserver.io/2019/02/21/the-lsio-pipeline-project/). Simply pulling `lscr.io/linuxserver/emulatorjs:latest` should retrieve the correct image for your arch, but you can also pull specific arch images via tags. The architectures supported by this image are: | Architecture | Available | Tag | | :----: | :----: | ---- | | x86-64 | ✅ | amd64-\ | | arm64 | ✅ | arm64v8-\ | | armhf | ❌ | | ## Application Setup The Backend can be accessed at: * http://yourhost:3000/ The first thing you will need to do is click to download the default art/configs from this interface, this will setup a skeleton directory in your `/data` mount. From there add roms to the respective `roms` directories and follow the on screen instructions to add them to your web frontend running on port 80. The frontend application has been initially optimized around being used with a standard gamepad (more specifically for modern Xbox consoles that have chromium based Edge browsers). The navigation revolves around the up/down/left/right keys to browse the menus and launch games. Mobile browsers will function, just keep in mind compatibility will be reduced especially for CD based games. **I understand there may be some confusion as to project naming, but when this project (linuxserver/emulatorjs) started it was meant to be a simple frontend for self hosting folks to use the at the time deobfuscated code of [https://www.emulatorjs.com/](https://www.emulatorjs.com/) that [ethanaobrien](https://github.com/ethanaobrien) was working on. Since then [EmulatorJS](https://github.com/EmulatorJS/EmulatorJS) has evolved into it's own amazing project based on [Libretro](https://github.com/libretro) cores that have been highly optimized to function for web. This project mostly contains custom built libretro cores found [here](https://github.com/linuxserver/libretro-cores). So in general despite the naming of this project and the logo this is just a docker container with a web based backend for generating a useable self hosted emulation website and is in no way affiliated with [EmulatorJS](https://github.com/EmulatorJS/EmulatorJS).** **For Xbox users please click the select button a couple times after launching a game to ensure the B button does not trigger a "back" action in the browser. (official name "view button" it is the two small squares) Exiting the controller mode and back to browser controls can be triggered by holding the start button for 3 seconds. (official name "menu button" the three lines) You will be unable to use features like save states and modify controller layouts on the emulatorjs based emulators currently as I have not determined a methodology of re-entering controller mode once you exit it. All normal game saves will function given you exit the game play screen cleanly using the B button for back this includes multi disc games for psx. Your game saves are stored in browser storage by hostname so if you make any changes to your local hosted setup (port or IP) the saves will not follow with it. For libretro based emulators you can use the button combination start+select+L+R to access the libretro menu and change settings/save or load/etc.** **We know about most of the oddities like crackling sound for some emulators, rendering issues, and games unreliably auto launching to fullscreen. In general full CD games on the Xbox web browser do not seem to work due to their size if you have a chd/pbp less than 450 megs it will run. Edge on Xbox has some kind of undocumented ram limitation of about a gigabyte. Until all emulators are transitioned to libretro cores the oddities of using self hosted EmulatorJS will not be something that can or should be solved using hacky workarounds interacting with obfuscated code. Just keep in mind these are full blown machine emulators running in Javascript in a browser, do not expect bare metal performance.** **This container (outside of the profile functionality) only generates a static set of files that can be hosted on any web provider even object storage. Eveyrthing runs in the clients browser and there are no dependencies on this container. To extract/copy this website it is at the path `/emulatorjs/frontend` inside the container. If you are happy with the catalouge you have created and no longer want to run stuff like the IPFS backend or want to upload these files to some other hosting provider you can simply copy the contents of that directory and kill off this container. This container can also be started without IPFS once you collection is set using the environment variable `-e DISABLE_IPFS=true`.** **Mounting in existing rom directories Read Only can be achieved by using a special root path `/roms`, For example for NES:** `-v /path/to/nes/roms:/roms/nes:ro` The folder names for systems are: * 3do * arcade * atari2600 * atari7800 * colecovision * doom * gb * gba * gbc * jaguar * lynx * msx * n64 * nds * nes * ngp * odyssey2 * pce * psx * sega32x * segaCD * segaGG * segaMD * segaMS * segaSaturn * segaSG * snes * vb * vectrex * ws ## Usage To help you get started creating a container from this image you can either use docker-compose or the docker cli. ### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose)) ```yaml --- services: emulatorjs: image: lscr.io/linuxserver/emulatorjs:latest container_name: emulatorjs environment: - PUID=1000 - PGID=1000 - TZ=Etc/UTC - SUBFOLDER=/ #optional volumes: - /path/to/config:/config - /path/to/data:/data ports: - 3000:3000 - 80:80 - 4001:4001 #optional restart: unless-stopped ``` ### docker cli ([click here for more info](https://docs.docker.com/engine/reference/commandline/cli/)) ```bash docker run -d \ --name=emulatorjs \ -e PUID=1000 \ -e PGID=1000 \ -e TZ=Etc/UTC \ -e SUBFOLDER=/ `#optional` \ -p 3000:3000 \ -p 80:80 \ -p 4001:4001 `#optional` \ -v /path/to/config:/config \ -v /path/to/data:/data \ --restart unless-stopped \ lscr.io/linuxserver/emulatorjs:latest ``` ## Parameters Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate `:` respectively. For example, `-p 8080:80` would expose port `80` from inside the container to be accessible from the host's IP on port `8080` outside the container. ### Ports (`-p`) | Parameter | Function | | :----: | --- | | `3000` | Rom/artwork management interface, used to generate/manage config files and download artwork | | `80` | Emulation frontend containing static web files used to browse and launch games | | `4001` | IPFS peering port, if you want to participate in the P2P network to distribute frontend artwork please forward this to the Internet | ### Environment Variables (`-e`) | Env | Function | | :----: | --- | | `PUID=1000` | for UserID - see below for explanation | | `PGID=1000` | for GroupID - see below for explanation | | `TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). | | `SUBFOLDER=/` | Specify a subfolder for reverse proxies IE '/FOLDER/' | ### Volume Mappings (`-v`) | Volume | Function | | :----: | --- | | `/config` | Path to store user profiles | | `/data` | Path to store roms/artwork | #### Miscellaneous Options | Parameter | Function | | :-----: | --- | ## Environment variables from files (Docker secrets) You can set any environment variable from a file by using a special prepend `FILE__`. As an example: ```bash -e FILE__MYVAR=/run/secrets/mysecretvariable ``` Will set the environment variable `MYVAR` based on the contents of the `/run/secrets/mysecretvariable` file. ## Umask for running applications For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional `-e UMASK=022` setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up [here](https://en.wikipedia.org/wiki/Umask) before asking for support. ## User / Group Identifiers When using volumes (`-v` flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user `PUID` and group `PGID`. Ensure any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic. In this instance `PUID=1000` and `PGID=1000`, to find yours use `id your_user` as below: ```bash id your_user ``` Example output: ```text uid=1000(your_user) gid=1000(your_user) groups=1000(your_user) ``` ## Docker Mods [![Docker Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=emulatorjs&query=%24.mods%5B%27emulatorjs%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=emulatorjs "view available mods for this container.") [![Docker Universal Mods](https://img.shields.io/badge/dynamic/yaml?color=94398d&labelColor=555555&logoColor=ffffff&style=for-the-badge&label=universal&query=%24.mods%5B%27universal%27%5D.mod_count&url=https%3A%2F%2Fraw.githubusercontent.com%2Flinuxserver%2Fdocker-mods%2Fmaster%2Fmod-list.yml)](https://mods.linuxserver.io/?mod=universal "view available universal mods.") We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above. ## Support Info * Shell access whilst the container is running: ```bash docker exec -it emulatorjs /bin/bash ``` * To monitor the logs of the container in realtime: ```bash docker logs -f emulatorjs ``` * Container version number: ```bash docker inspect -f '{{ index .Config.Labels "build_version" }}' emulatorjs ``` * Image version number: ```bash docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/emulatorjs:latest ``` ## Updating Info Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (noted in the relevant readme.md), we do not recommend or support updating apps inside the container. Please consult the [Application Setup](#application-setup) section above to see if it is recommended for the image. Below are the instructions for updating containers: ### Via Docker Compose * Update images: * All images: ```bash docker-compose pull ``` * Single image: ```bash docker-compose pull emulatorjs ``` * Update containers: * All containers: ```bash docker-compose up -d ``` * Single container: ```bash docker-compose up -d emulatorjs ``` * You can also remove the old dangling images: ```bash docker image prune ``` ### Via Docker Run * Update the image: ```bash docker pull lscr.io/linuxserver/emulatorjs:latest ``` * Stop the running container: ```bash docker stop emulatorjs ``` * Delete the container: ```bash docker rm emulatorjs ``` * Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your `/config` folder and settings will be preserved) * You can also remove the old dangling images: ```bash docker image prune ``` ### Image Update Notifications - Diun (Docker Image Update Notifier) !!! tip We recommend [Diun](https://crazymax.dev/diun/) for update notifications. Other tools that automatically update containers unattended are not recommended or supported. ## Building locally If you want to make local modifications to these images for development purposes or just to customize the logic: ```bash git clone https://github.com/linuxserver/docker-emulatorjs.git cd docker-emulatorjs docker build \ --no-cache \ --pull \ -t lscr.io/linuxserver/emulatorjs:latest . ``` The ARM variants can be built on x86_64 hardware using `multiarch/qemu-user-static` ```bash docker run --rm --privileged multiarch/qemu-user-static:register --reset ``` Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64`. ## Versions * **24.01.24:** - Pin node back on aarch64 as well for compatibility. * **23.01.24:** - Add logic to symlink out RO rom directories to support upgrades. * **14.01.24:** - Update remaining cores for melonds and yabause threaded to fix audio issues. * **11.01.24:** - Use Node 16 on x86 image to restore metadata uploads in backend, update psx core to current. * **07.01.24:** - Update to use new Mupen64 plus core by default. * **06.01.24:** - Update many emulators to fix audio issues and use latest codebases. * **29.12.23:** - Rebase to Alpine 3.19, add option to launch without IPFS. * **09.08.23:** - Rebase to Alpine 3.18, migrate to s6v3. * **06.07.23:** - Deprecate armhf. As announced [here](https://www.linuxserver.io/blog/a-farewell-to-arm-hf) * **24.11.22:** - Update IPFS links for chdman. * **04.04.22:** - Ingest pre-built chdman bins during build time. * **23.02.22:** - Update ingestion point for emulatorjs bins. * **25.01.22:** - Allow users to mount in existing rom directories. * **14.01.22:** - Add profile paths and rebase to Alpine 3.15. * **04.01.22:** - Add headers needed for Threaded emulators. * **29.11.21:** - Add wasm mime type to NGINX. * **26.11.21:** - Configure IPFS in a lower power mode, use homebuilt blobs for emu cores. * **19.11.21:** - Pin retroarch version. * **14.11.21:** - Update default cores to ingest. * **23.10.21:** - Initial release.