diff --git a/src/components/views/dialogs/DevtoolsDialog.js b/src/components/views/dialogs/DevtoolsDialog.js
new file mode 100644
index 000000000..a7ac9fb1c
--- /dev/null
+++ b/src/components/views/dialogs/DevtoolsDialog.js
@@ -0,0 +1,276 @@
+/*
+Copyright 2017 Michael Telatynski <7t3chguy@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import sdk from 'matrix-react-sdk';
+import { _t } from 'matrix-react-sdk/lib/languageHandler';
+import MatrixClientPeg from 'matrix-react-sdk/lib/MatrixClientPeg';
+
+class SendCustomEvent extends React.Component {
+    static propTypes = {
+        roomId: React.PropTypes.string.isRequired,
+        onBack: React.PropTypes.func.isRequired,
+    };
+
+    constructor(props, context) {
+        super(props, context);
+        this._send = this._send.bind(this);
+        this.onBack = this.onBack.bind(this);
+    }
+
+    state = {
+        message: null,
+    };
+
+    onBack() {
+        if (this.state.message) {
+            this.setState({ message: null });
+        } else {
+            this.props.onBack();
+        }
+    }
+
+    _buttons() {
+        return <div className="mx_Dialog_buttons">
+            <button onClick={this.onBack}>{ _t('Back') }</button>
+            {!this.state.message && <button onClick={this._send}>{ _t('Send') }</button>}
+        </div>;
+    }
+
+    send(content) {
+        return MatrixClientPeg.get().sendEvent(this.props.roomId, this.refs.eventType.value, content);
+    }
+
+    async _send() {
+        let message;
+        try {
+            const content = JSON.parse(this.refs.evContent.value);
+            await this.send(content);
+            message = _t('Event sent!');
+        } catch (e) {
+            message = _t('Failed to send custom event.') + ' (' + e.toString() + ')';
+        }
+        this.setState({ message });
+    }
+
+    _additionalFields() {
+        return <div></div>;
+    }
+
+    render() {
+        if (this.state.message) {
+            return <div>
+                <div className="mx_Dialog_content">
+                    {this.state.message}
+                </div>
+                {this._buttons()}
+            </div>;
+        }
+
+        return <div>
+            <div className="mx_Dialog_content">
+                {this._additionalFields()}
+                <div className="mx_TextInputDialog_label">
+                    <label htmlFor="eventType"> { _t('Event Type') } </label>
+                </div>
+                <div>
+                    <input id="eventType" ref="eventType" className="mx_TextInputDialog_input" size="64" />
+                </div>
+
+                <div className="mx_TextInputDialog_label">
+                    <label htmlFor="evContent"> { _t('Event Content') } </label>
+                </div>
+                <div>
+                    <textarea id="evContent" ref="evContent" className="mx_TextInputDialog_input" defaultValue={"{\n\n}"} cols="63" rows="5" />
+                </div>
+            </div>
+            {this._buttons()}
+        </div>;
+    }
+}
+
+class SendCustomStateEvent extends SendCustomEvent {
+    send(content) {
+        return MatrixClientPeg.get().sendStateEvent(this.props.roomId, this.refs.eventType.value, content,
+            this.refs.stateKey.value);
+    }
+
+    _additionalFields() {
+        return <div>
+            <div className="mx_TextInputDialog_label">
+                <label htmlFor="stateKey"> { _t('State Key') } </label>
+            </div>
+            <div>
+                <input id="stateKey" ref="stateKey" className="mx_TextInputDialog_input" size="64" />
+            </div>
+        </div>;
+    }
+}
+
+class RoomStateExplorer extends React.Component {
+    static propTypes = {
+        roomId: React.PropTypes.string.isRequired,
+        onBack: React.PropTypes.func.isRequired,
+    };
+
+    constructor(props, context) {
+        super(props, context);
+
+        const room = MatrixClientPeg.get().getRoom(this.props.roomId);
+        this.roomStateEvents = room.currentState.events;
+
+        this.onBack = this.onBack.bind(this);
+    }
+
+    state = {
+        eventType: null,
+        event: null,
+    };
+
+    browseEventType(eventType) {
+        return () => {
+            this.setState({ eventType });
+        };
+    }
+
+    onViewSourceClick(event) {
+        return () => {
+            this.setState({ event: event.event });
+        };
+    }
+
+    onBack() {
+        if (this.state.event) {
+            this.setState({ event: null });
+        } else if (this.state.eventType) {
+            this.setState({ eventType: null });
+        } else {
+            this.props.onBack();
+        }
+    }
+
+    render() {
+        if (this.state.event) {
+            return <div className="mx_ViewSource">
+                <div className="mx_Dialog_content">
+                    <pre>{JSON.stringify(this.state.event, null, 2)}</pre>
+                </div>
+                <div className="mx_Dialog_buttons">
+                    <button onClick={this.onBack}>{ _t('Back') }</button>
+                </div>
+            </div>;
+        }
+
+        const rows = [];
+
+        if (this.state.eventType === null) {
+            Object.keys(this.roomStateEvents).forEach((evType) => {
+                const stateGroup = this.roomStateEvents[evType];
+                const stateKeys = Object.keys(stateGroup);
+
+                let onClickFn;
+                if (stateKeys.length > 1) {
+                    onClickFn = this.browseEventType(evType);
+                } else if (stateKeys.length === 1) {
+                    onClickFn = this.onViewSourceClick(stateGroup[stateKeys[0]]);
+                }
+
+                rows.push(<button className="mx_DevTools_RoomStateExplorer_button" key={evType} onClick={onClickFn}>
+                    { evType }
+                </button>);
+            });
+        } else {
+            const evType = this.state.eventType;
+            const stateGroup = this.roomStateEvents[evType];
+            Object.keys(stateGroup).forEach((stateKey) => {
+                const ev = stateGroup[stateKey];
+                rows.push(<button className="mx_DevTools_RoomStateExplorer_button" key={stateKey}
+                                  onClick={this.onViewSourceClick(ev)}>
+                    { stateKey }
+                </button>);
+            });
+        }
+
+        return <div>
+            <div className="mx_Dialog_content">
+                {rows}
+            </div>
+            <div className="mx_Dialog_buttons">
+                <button onClick={this.onBack}>{ _t('Back') }</button>
+            </div>
+        </div>;
+    }
+}
+
+export default class DevtoolsDialog extends React.Component {
+    static propTypes = {
+        roomId: React.PropTypes.string.isRequired,
+        onFinished: React.PropTypes.func.isRequired,
+    };
+
+    state = {
+        mode: null,
+    };
+
+    constructor(props, context) {
+        super(props, context);
+        this.onBack = this.onBack.bind(this);
+        this.onCancel = this.onCancel.bind(this);
+    }
+
+    componentWillUnmount() {
+        this._unmounted = true;
+    }
+
+    _setMode(mode) {
+        return () => {
+            this.setState({ mode });
+        };
+    }
+
+    onBack() {
+        this.setState({ mode: null });
+    }
+
+    onCancel() {
+        this.props.onFinished(false);
+    }
+
+    render() {
+        let body;
+
+        if (this.state.mode) {
+            body = <this.state.mode {...this.props} onBack={this.onBack} />;
+        } else {
+            body = <div>
+                <div className="mx_Dialog_content">
+                    <button onClick={this._setMode(SendCustomEvent)}>{ _t('Send Custom Event') }</button>
+                    <button onClick={this._setMode(SendCustomStateEvent)}>{ _t('Send Custom State Event') }</button>
+                    <button onClick={this._setMode(RoomStateExplorer)}>{ _t('Explore Room State') }</button>
+                </div>
+                <div className="mx_Dialog_buttons">
+                    <button onClick={this.onCancel}>{ _t('Cancel') }</button>
+                </div>
+            </div>;
+        }
+
+        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
+        return <BaseDialog className="mx_QuestionDialog" onFinished={this.props.onFinished} title={_t('Developer Tools')}>
+            <div>Room ID: {this.props.roomId}</div>
+            { body }
+        </BaseDialog>;
+    }
+}
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 0dc935948..4f4a788b1 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -9,6 +9,7 @@
   "All Rooms": "All Rooms",
   "All notifications are currently disabled for all targets.": "All notifications are currently disabled for all targets.",
   "An error occurred whilst saving your email notification preferences.": "An error occurred whilst saving your email notification preferences.",
+  "Back": "Back",
   "Bug report sent": "Bug report sent",
   "Call invitation": "Call invitation",
   "Cancel": "Cancel",
@@ -26,6 +27,7 @@
   "delete the alias.": "delete the alias.",
   "Delete the room alias %(alias)s and remove %(name)s from the directory?": "Delete the room alias %(alias)s and remove %(name)s from the directory?",
   "Describe your problem here.": "Describe your problem here.",
+  "Developer Tools": "Developer Tools",
   "Direct Chat": "Direct Chat",
   "Directory": "Directory",
   "Dismiss": "Dismiss",
@@ -50,6 +52,7 @@
   "Failed to get public room list": "Failed to get public room list",
   "Failed to join the room": "Failed to join the room",
   "Failed to remove tag %(tagName)s from room": "Failed to remove tag %(tagName)s from room",
+  "Failed to send custom event.": "Failed to send custom event.",
   "Failed to send report: ": "Failed to send report: ",
   "Failed to set direct chat tag": "Failed to set direct chat tag",
   "Failed to set Direct Message status of room": "Failed to set Direct Message status of room",
@@ -117,6 +120,9 @@
   "Search for a room": "Search for a room",
   "Send": "Send",
   "Send logs": "Send logs",
+  "Send Custom Event": "Send Custom Event",
+  "Send Custom State Event": "Send Custom State Event",
+  "Explore Room State": "Explore Room State",
   "Settings": "Settings",
   "Source URL": "Source URL",
   "Sorry, your browser is <b>not</b> able to run Riot.": "Sorry, your browser is <b>not</b> able to run Riot.",
@@ -164,6 +170,10 @@
   "Warning": "Warning",
   "Checking for an update...": "Checking for an update...",
   "Error encountered (%(errorDetail)s).": "Error encountered (%(errorDetail)s).",
+  "Event sent!": "Event sent!",
+  "Event Type": "Event Type",
+  "Event Content": "Event Content",
+  "State Key": "State Key",
   "No update available.": "No update available.",
   "Downloading update...": "Downloading update...",
   "You need to be using HTTPS to place a screen-sharing call.": "You need to be using HTTPS to place a screen-sharing call.",
diff --git a/src/skins/vector/css/_components.scss b/src/skins/vector/css/_components.scss
index 00c19b13d..8caf15ca1 100644
--- a/src/skins/vector/css/_components.scss
+++ b/src/skins/vector/css/_components.scss
@@ -74,6 +74,7 @@
 @import "./vector-web/views/context_menus/_MessageContextMenu.scss";
 @import "./vector-web/views/context_menus/_RoomTileContextMenu.scss";
 @import "./vector-web/views/dialogs/_ChangelogDialog.scss";
+@import "./vector-web/views/dialogs/_DevtoolsDialog.scss";
 @import "./vector-web/views/dialogs/_SetEmailDialog.scss";
 @import "./vector-web/views/dialogs/_SetPasswordDialog.scss";
 @import "./vector-web/views/directory/_NetworkDropdown.scss";
diff --git a/src/skins/vector/css/vector-web/views/dialogs/_DevtoolsDialog.scss b/src/skins/vector/css/vector-web/views/dialogs/_DevtoolsDialog.scss
new file mode 100644
index 000000000..c22a38341
--- /dev/null
+++ b/src/skins/vector/css/vector-web/views/dialogs/_DevtoolsDialog.scss
@@ -0,0 +1,19 @@
+/*
+Copyright 2017 Michael Telatynski <7t3chguy@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_DevTools_RoomStateExplorer_button {
+    margin-bottom: 10px;
+}