* harden: reject USER_CHANGES inserts without an author attribute Insert ops MUST carry the author attribute reference so that pad.atext.text and pad.atext.attribs stay in lock-step. An accepted insert with empty attribs would grow text without contributing matching attribute markers, leaving the stored AText in a state where the two iterables disagree on length when reconstructed. Downstream clients then fail reconciliation in ace2_inner.ts:setDocAText with 'mismatch error setting raw text in setDocAText' on every subsequent pad load — making the affected pad effectively unloadable until manually repaired. This commit adds a single defensive check inside the existing per-op validation loop in handleUserChanges: when an op is a '+' (insert) and its attribs string doesn't yield an 'author' entry via AttributeMap.fromString, reject with badChangeset. The check piggybacks on the wireApool that was already constructed for the prior author-match validation, so no extra parsing. Test fixtures in messages.ts were updated to send proper author-attributed inserts plus the matching apool (mirroring what the JS web client always does). A new regression test 'insert without author attribute is rejected' locks in the new behaviour. * harden: also close the HTTP API / plugin path via stable system author The first commit closed the socket.io USER_CHANGES hole. This commit closes the parallel path through Pad.spliceText (used by API.setText, API.appendText, the import flow, and plugins like ep_post_data) where an unattributed insert would otherwise produce a malformed AText. Approach: instead of REJECTING (which would break ep_post_data and many existing tests that call setText/appendText without an authorId), substitute a stable system author when none is provided. The resulting changeset is properly attributed, the AText stays well-formed, and existing callers continue to work unchanged. Plugins that want named author attribution should still pass an explicit authorId (e.g., one allocated via authorManager.createAuthor). Pad.SYSTEM_AUTHOR_ID = 'a.etherpad-system' — a stable identifier that appears in the pad's attribute pool when internal callers (HTTP API, plugins, server-side imports) write text without naming an author. The existing 'attribute changes by another author' protections still apply to socket.io USER_CHANGES paths — a remote client can't impersonate the system author for inserts (their session author check fires first). Test: - Pad.ts spec adds 'spliceText with empty authorId attributes to the system author' — verifies pad text lands AND the pool contains the system-author binding. Existing tests that pass an authorId are unaffected. * harden: reject USER_CHANGES that would strand the trailing newline Etherpad's pad text always ends with '\n'. _handleUserChanges previously appended a separate `nlChangeset` correction revision whenever the applied USER_CHANGES left the pad without a trailing '\n'. The stored pad ended up well-formed, but the FIRST NEW_CHANGES broadcast (the malformed user revision itself) reached browsers BEFORE the correction did, and applyToAttribution's MergingOpAssembler aborts with "line assembler not finished" on a non-'\n'-terminated doc — the watching browser session then dropped the changeset and any subsequent edits silently no-op'd until the user reloaded. Replace the silent auto-correction with an explicit reject. Compute `applyToText(rebasedChangeset, prevText)` before appendRevision; if the result doesn't end with '\n', throw -> badChangeset disconnect. Clients must emit USER_CHANGES whose application preserves the invariant — this matches what the JS web client already does and forces non-JS clients (etherpad-pad, third-party integrations) to surface their bugs in their own logs instead of stranding the trailing newline in pad revision history. Also fixes a latent retransmission-detection bug surfaced by this PR's author-attrib changes: moveOpsToNewPool renumbers `*N` references to whatever slot the pad pool assigns, which can differ from the wire form's slot. Comparing the raw client wire against the stored revision form (`changeset === c`) then misses legitimate retransmissions and the same edit gets duplicated. Snapshot the post-pool-mapping form (`canonicalCs`) and compare that against `c` instead. Backend test additions: - 'changeset that would strand the trailing \\n is rejected' covers the new rejection path with wire `Z:6>1|1=6*0+1$X` against `hello\n`. - handleMessageSecurity test now captures roSocket's own authorId and uses it in the apool sent through roSocket, because the prior PR commit made `*0` referencing the wrong author a hard reject. All 1130 backend tests pass. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * chore: bump etherpad-cli-client to ^4.0.3 4.0.3 sends author-attributed inserts and preserves the trailing newline, complying with this PR's tightened USER_CHANGES validation. The rate-limit CI workflow drives the test pad via this client, so without the bump the new server-side rejects fire on the very first \`pad.append()\` and the rate-limit disconnect never gets a chance to arrive — testlimits.sh exits 0 instead of 1 and the rate-limit job fails with "ratelimit was not triggered when sending every 99 ms". Refs ether/etherpad-cli-client#131 * harden: reject USER_CHANGES that name the reserved system author The session-author equality check already rejects wire `*N` that names a different real user, but `a.etherpad-system` is server- internal — it's only used when spliceText / setText is called with an empty authorId from HTTP API or plugin paths. A wire op that names it is either a confused client or an attempt to launder edits through a reserved attribution slot. Refuse. Backend test 'insert claiming the reserved system author is rejected' locks in the new behavior with wire `Z:1>5*0+5$hello` plus an apool that maps slot 0 to `a.etherpad-system`. All 1131 backend tests pass. Inline literal `'a.etherpad-system'` rather than importing the constant from `Pad.SYSTEM_AUTHOR_ID` — `require('../db/Pad')` at PadMessageHandler module scope returned a partially-initialized class via the padManager circular path, leaving the static-field access undefined at runtime. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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| AGENTS.MD | ||
| best_practices.md | ||
| CHANGELOG.md | ||
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| docker-compose.dev.yml | ||
| docker-compose.yml | ||
| Dockerfile | ||
| LICENSE | ||
| package.json | ||
| pnpm-lock.yaml | ||
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| README.md | ||
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Etherpad — the editor for documents that matter
Real-time collaborative editing where authorship is the default, your server is the only server, and you decide what AI (if any) ever touches your text.
About
Etherpad is a real-time collaborative editor for documents that matter.
Every keystroke is attributed to its author. Every revision is preserved. The timeslider lets you scrub through a document's entire history, character by character. Author colours make collaboration visible at a glance — not buried in a menu.
Etherpad runs on your server, under your governance. No telemetry. No upsells. AI is a plugin you install, pointed at the model you choose, running on infrastructure you control — not a feature decided for you in a boardroom you weren't in.
The code is Apache 2.0. The data format is open. It scales to thousands of simultaneous editors per pad. Translated into 105 languages. Extended through hundreds of plugins. Used by Wikimedia, governments, public-sector institutions, and self-hosters worldwide since 2009.
Full data export is built in. The history is yours.
Try it out
Try out a public Etherpad instance
Project Status
Etherpad has been doing the same thing — well — since 2009. No pivots, no acquisitions, no enshittification. Maintained by a small volunteer team.
We are actively looking for maintainers. If you have experience with Node.js, real-time systems, or institutional collaboration tooling and you want to work on infrastructure that thousands of organisations quietly depend on, please open an issue or contact John McLear.
Code Quality
Testing
Engagement
Who uses Etherpad
For more than a decade, Etherpad has quietly underpinned the documents that matter to:
- Wikimedia Foundation — collaborative drafting across editor communities.
- Public-sector institutions across the EU — including organisations that legally cannot use US-cloud SaaS for sovereignty and GDPR reasons.
- Universities and schools worldwide — including jurisdictions where Google Workspace is no longer permitted in education.
- Civic-tech and democratic-deliberation projects — citizen assemblies, participatory budgeting, public consultations.
- Newsrooms and investigative journalism teams — where authorship and editing history matter for legal and editorial integrity.
- Tens of thousands of self-hosted instances worldwide, run by IT teams who chose Etherpad because it is theirs.
Installation
Quick install (one-liner)
The fastest way to get Etherpad running. Requires git and Node.js >= 24.
macOS / Linux / WSL:
curl -fsSL https://raw.githubusercontent.com/ether/etherpad/master/bin/installer.sh | sh
Windows (PowerShell):
irm https://raw.githubusercontent.com/ether/etherpad/master/bin/installer.ps1 | iex
Both installers clone Etherpad into ./etherpad-lite, install dependencies, and
build the frontend. When the installer finishes, run:
cd etherpad-lite && pnpm run prod
Then open http://localhost:9001.
To install and start in one go:
# macOS / Linux / WSL
ETHERPAD_RUN=1 sh -c "$(curl -fsSL https://raw.githubusercontent.com/ether/etherpad/master/bin/installer.sh)"
# Windows
$env:ETHERPAD_RUN=1; irm https://raw.githubusercontent.com/ether/etherpad/master/bin/installer.ps1 | iex
Docker-Compose
The official image is published to both Docker Hub (etherpad/etherpad) and GitHub Container Registry (ghcr.io/ether/etherpad) with identical tags. Use whichever suits your environment; GHCR avoids Docker Hub's anonymous pull rate limits.
services:
app:
user: "0:0"
image: etherpad/etherpad:latest # or: ghcr.io/ether/etherpad:latest
tty: true
stdin_open: true
volumes:
- plugins:/opt/etherpad-lite/src/plugin_packages
- etherpad-var:/opt/etherpad-lite/var
depends_on:
- postgres
environment:
NODE_ENV: production
ADMIN_PASSWORD: ${DOCKER_COMPOSE_APP_ADMIN_PASSWORD:-admin}
DB_CHARSET: ${DOCKER_COMPOSE_APP_DB_CHARSET:-utf8mb4}
DB_HOST: postgres
DB_NAME: ${DOCKER_COMPOSE_POSTGRES_DATABASE:-etherpad}
DB_PASS: ${DOCKER_COMPOSE_POSTGRES_PASSWORD:-admin}
DB_PORT: ${DOCKER_COMPOSE_POSTGRES_PORT:-5432}
DB_TYPE: "postgres"
DB_USER: ${DOCKER_COMPOSE_POSTGRES_USER:-admin}
# For now, the env var DEFAULT_PAD_TEXT cannot be unset or empty; it seems to be mandatory in the latest version of etherpad
DEFAULT_PAD_TEXT: ${DOCKER_COMPOSE_APP_DEFAULT_PAD_TEXT:- }
DISABLE_IP_LOGGING: ${DOCKER_COMPOSE_APP_DISABLE_IP_LOGGING:-false}
SOFFICE: ${DOCKER_COMPOSE_APP_SOFFICE:-null}
TRUST_PROXY: ${DOCKER_COMPOSE_APP_TRUST_PROXY:-true}
restart: always
ports:
- "${DOCKER_COMPOSE_APP_PORT_PUBLISHED:-9001}:${DOCKER_COMPOSE_APP_PORT_TARGET:-9001}"
postgres:
image: postgres:15-alpine
environment:
POSTGRES_DB: ${DOCKER_COMPOSE_POSTGRES_DATABASE:-etherpad}
POSTGRES_PASSWORD: ${DOCKER_COMPOSE_POSTGRES_PASSWORD:-admin}
POSTGRES_PORT: ${DOCKER_COMPOSE_POSTGRES_PORT:-5432}
POSTGRES_USER: ${DOCKER_COMPOSE_POSTGRES_USER:-admin}
PGDATA: /var/lib/postgresql/data/pgdata
restart: always
# Exposing the port is not needed unless you want to access this database instance from the host.
# Be careful when other postgres docker container are running on the same port
# ports:
# - "5432:5432"
volumes:
- postgres_data:/var/lib/postgresql/data
volumes:
postgres_data:
plugins:
etherpad-var:
Requirements
Node.js >= 24.
Windows, macOS, Linux
- Download the latest Node.js runtime from nodejs.org.
- Install pnpm:
npm install -g pnpm(Administrator privileges may be required). - Clone the repository:
git clone -b master - Run
pnpm i - Run
pnpm run build:etherpad - Run
pnpm run prod - Visit
http://localhost:9001in your browser.
Docker container
Find here information on running Etherpad in a container.
Plugins
Etherpad is very customizable through plugins.
Available Plugins
For a list of available plugins, see the plugins site.
Plugin Installation
You can install plugins from the admin web interface (e.g., http://127.0.0.1:9001/admin/plugins).
Alternatively, you can install plugins from the command line:
cd /path/to/etherpad-lite
pnpm run plugins i ep_${plugin_name}
Also see the plugin wiki article.
Suggested Plugins
Run the following command in your Etherpad folder to get all of the features visible in the above demo gif:
pnpm run plugins i \
ep_align \
ep_comments_page \
ep_embedded_hyperlinks2 \
ep_font_color \
ep_headings2 \
ep_markdown \
ep_webrtc
For user authentication, you are encouraged to run an OpenID Connect identity provider (OP) and install the following plugins:
- ep_openid_connect to authenticate against your OP.
- ep_guest to create a "guest" account that has limited access (e.g., read-only access).
- ep_user_displayname to automatically populate each user's displayed name from your OP.
- ep_stable_authorid so that each user's chosen color, display name, comment ownership, etc. is strongly linked to their account.
Upgrade Etherpad
Run the following command in your Etherpad folder to upgrade
- Stop any running Etherpad (manual, systemd ...)
- Get present version
git -P tag --contains
- List versions available
git -P tag --list "v*" --merged
- Select the version
git checkout v2.2.5
git switch -c v2.2.5
- Upgrade Etherpad
./bin/run.sh
- Stop with [CTRL-C]
- Restart your Etherpad service
Next Steps
Tweak the settings
You can modify the settings in settings.json. If you need to handle multiple
settings files, you can pass the path to a settings file to bin/run.sh
using the -s|--settings option: this allows you to run multiple Etherpad
instances from the same installation. Similarly, --credentials can be used to
give a settings override file, --apikey to give a different APIKEY.txt file
and --sessionkey to give a non-default SESSIONKEY.txt. Each configuration
parameter can also be set via an environment variable, using the syntax
"${ENV_VAR}" or "${ENV_VAR:default_value}". For details, refer to
settings.json.template. Once you have access to your /admin section,
settings can be modified through the web browser.
If you are planning to use Etherpad in a production environment, you should use
a dedicated database such as mysql, since the dirtyDB database driver is
only for testing and/or development purposes.
Secure your installation
If you have enabled authentication in users section in settings.json, it is
a good security practice to store hashes instead of plain text passwords in
that file. This is especially advised if you are running a production
installation.
Please install ep_hash_auth plugin
and configure it. If you prefer, ep_hash_auth also gives you the option of
storing the users in a custom directory in the file system, without having to
edit settings.json and restart Etherpad each time.
Customize the style with skin variants
Open http://127.0.0.1:9001/p/test#skinvariantsbuilder in your browser and start playing!
Helpful resources
The wiki is your one-stop resource for Tutorials and How-to's.
Documentation can be found in doc/.
Development
Things you should know
You can debug Etherpad using bin/debugRun.sh.
You can run Etherpad quickly launching bin/fastRun.sh. It's convenient for
developers and advanced users. Be aware that it will skip the dependencies
update, so remember to run bin/installDeps.sh after installing a new
dependency or upgrading version.
If you want to find out how Etherpad's Easysync works (the library that makes
it really realtime), start with this
PDF
(complex, but worth reading).
Contributing
Read our Developer Guidelines
HTTP API
Etherpad is designed to be easily embeddable and provides a HTTP API that allows your web application to manage pads, users and groups. It is recommended to use the available client implementations in order to interact with this API.
OpenAPI (previously swagger) definitions for the API are exposed under
/api/openapi.json.
jQuery plugin
There is a jQuery plugin that helps you to embed Pads into your website.
Plugin Framework
Etherpad offers a plugin framework, allowing you to easily add your own features. By default your Etherpad is extremely light-weight and it's up to you to customize your experience. Once you have Etherpad installed you should visit the plugin page and take control.
Translations / Localizations (i18n / l10n)
Etherpad comes with translations into all languages thanks to the team at TranslateWiki.
If you require translations in plugins please send pull request to each plugin individually.
FAQ
Visit the FAQ.
Get in touch
The official channel for contacting the development team is via the GitHub issues.
For responsible disclosure of vulnerabilities, please write a mail to the maintainers (a.mux@inwind.it and contact@etherpad.org).
Join the official Etherpad Discord Channel.



