# Lucidchart

- Tool: FlutterFlow
- Difficulty: Beginner
- Time required: 15 minutes
- Last updated: July 2026

## TL;DR

Connect FlutterFlow to Lucidchart by embedding your diagram as a static image or a live WebView — there is no runtime data API to wire up. Export your diagram as PNG or SVG and add it to FlutterFlow Assets, or get Lucidchart's publish embed link and drop it into a WebView widget for a zoomable, always-current view. No API token or Cloud Function required.

## Why Lucidchart Belongs in a FlutterFlow App

Many apps need to display process diagrams, onboarding flowcharts, system architecture maps, or org charts without rebuilding those visuals from scratch. Lucidchart is the tool your team already uses to create those assets — and getting them into a FlutterFlow app takes minutes, not hours. The key is choosing the right embed path for your needs.

Lucidchart does have an enterprise REST API, but it is designed for admin and account management tasks, not for rendering live diagram data inside a mobile app. The realistic, honest answer for FlutterFlow builders is one of two paths: export the diagram as a static image (PNG for simple visuals, SVG for crisp scaling on retina and high-DPI screens) and upload it to FlutterFlow's Assets panel, or publish the diagram in Lucidchart and paste the embed link into a WebView widget so users can pan and zoom the live, always-current version. Lucidchart's free plan supports up to three editable diagrams with unlimited view-only access, and paid plans start at around $9 per user per month.

Because no secret credentials are involved, none of the backend proxy rules that apply to tools like monday.com or Shippo apply here. There is no API token to protect, no Cloud Function to deploy, and no JSON response to parse. The trade-off is that a WebView embed requires an internet connection, while a static image works offline — understanding that trade-off is the whole decision.

## Before you start

- A Lucidchart account (free plan is sufficient for up to 3 editable diagrams)
- A FlutterFlow account with a project set up
- Your diagram finished and ready to export or publish in Lucidchart
- For the WebView path: a published (not private) Lucidchart embed link
- For the image path: your exported PNG or SVG file saved locally

## Step-by-step guide

### 1. Finish your diagram in Lucidchart and decide on the embed method

Open your diagram in Lucidchart and make sure it is in its final state before you export or publish. The single most important decision you will make for this integration is choosing between the static image path and the live WebView path — and each has a different trade-off worth understanding before you start.

The static image path (PNG or SVG) renders the diagram as a file stored inside your FlutterFlow project. It is fast, works offline, and never requires an internet connection after the app is built. The downside is that if you update the diagram in Lucidchart, you need to re-export the file and re-upload it to FlutterFlow Assets, then rebuild the app. This is the right choice for diagrams that change rarely or need to be available without a network — for example, an emergency procedure flowchart or a regulatory compliance map.

The live WebView path fetches the diagram from Lucidchart's servers every time the screen opens. The diagram is always current: update it in Lucidchart and the app immediately reflects the change at the next load. The user can also pan and zoom the diagram interactively in the WebView. The downside is that the screen requires an internet connection to display anything, and if Lucidchart is unreachable the WebView shows a blank or error state. This is the right choice for diagrams that your team updates frequently — onboarding flows, org charts, sprint maps.

Choose one path now and move to the corresponding step. You can always combine both on the same screen later (show the WebView when online, fall back to a cached image when offline) once you are comfortable with each approach separately.

**Expected result:** You have a clear decision: static image export OR live WebView embed. Your Lucidchart diagram is final and ready.

### 2. Export as PNG or SVG and upload to FlutterFlow Assets (static image path)

If you chose the static image path, go to your Lucidchart diagram and click File in the top menu bar, then hover over Download As and select either PNG or SVG from the submenu. For PNG, Lucidchart will ask you to choose a resolution — select the highest resolution available (2x or 3x) to avoid blurry output on high-DPI screens. For SVG, no resolution choice is needed; SVG is resolution-independent and will scale perfectly at any size.

Save the exported file to your computer. Now open your FlutterFlow project in the browser. In the left navigation panel, click the Assets icon (it looks like a photo or image thumbnail). At the top right of the Assets panel, click Upload Asset. Drag and drop your PNG or SVG file into the upload dialog, or click to browse and select it. FlutterFlow will process the upload and show it in your asset library with a preview thumbnail.

Once the asset appears in the library, note its name — you will select it by name when configuring the Image widget in the next step. If you uploaded an SVG, FlutterFlow will render it as a vector image widget that scales without quality loss. PNG files are rasterized and look best when the exported resolution is at least twice the display size you intend.

One important note: this asset lives inside your FlutterFlow project. When you update the diagram in Lucidchart, you must re-export, re-upload (overwrite the old file using the same filename), and rebuild your app. For diagrams that change rarely, this is a fast and reliable workflow that requires no backend infrastructure at all.

**Expected result:** Your PNG or SVG diagram file appears in the FlutterFlow Assets panel with a preview thumbnail.

### 3. Get the Lucidchart publish embed URL (live WebView path)

If you chose the live WebView path, go back to your Lucidchart diagram. In the top menu bar, click the Share button. In the sharing dialog, look for the Publish option — it is typically labeled 'Publish' or 'Embed & Publish' depending on your Lucidchart plan. Click Publish. Lucidchart will prompt you to confirm that you want to make the diagram publicly accessible via a link. Review the security implications at this point: a published diagram is accessible to anyone with the link. If your diagram contains sensitive internal architecture, an internal roadmap, or confidential org chart information, reconsider whether a public link is appropriate.

Once you click Publish, Lucidchart generates an embed URL. Copy this URL — it will look something like `https://lucid.app/documents/embeddedchart/...`. This is the URL you will paste into FlutterFlow's WebView widget in the next step. The URL points to a responsive, zoomable, pan-able view of the diagram that works in any browser or WebView, including FlutterFlow's web target and native iOS/Android builds.

Keep this URL available — you will not need a Lucidchart API key, an access token, or any credentials. The embed URL is the entire integration. Unlike tools such as monday.com or Shippo where you need a Cloud Function to hold a secret token safely, Lucidchart's embed URL is designed to be used directly in a WebView with no backend setup required.

**Expected result:** You have the Lucidchart embed URL copied to your clipboard, ready to paste into FlutterFlow.

### 4. Add the Image or WebView widget in FlutterFlow

Now open your FlutterFlow project and navigate to the screen where you want the diagram to appear. In FlutterFlow's widget panel (the left navigation Add section, or the + button on the canvas), search for and add the appropriate widget for your chosen path.

For the static image path: search for and add an Image widget to your screen. In the Image widget's properties panel on the right, look for the Image Type field. Select Asset (for your uploaded PNG or SVG), then click the Asset picker and select the diagram file you uploaded in Step 2. Set the Fit property to Contain so the full diagram is visible without cropping — especially important for wide flowcharts. You can also wrap the Image in an InteractiveViewer widget to enable pinch-to-zoom and panning without any custom code at all.

For the live WebView path: search for and add a WebView widget to your screen. In the WebView widget's properties on the right, set the URL property to the Lucidchart embed URL you copied in Step 3. Set the Allow Scroll property to enabled so users can scroll within the diagram. If you want the WebView to fill the screen, wrap it in a Container with full height and width, or set the WebView's expansion to fill parent in the layout properties.

For both paths: consider adding a loading indicator (a CircularProgressIndicator) that shows while the image or WebView loads. For the WebView, also add an error state widget that appears if the Lucidchart URL is unreachable, so the screen does not show a blank page on offline devices. In FlutterFlow, you can configure conditional widget visibility using an App State boolean that tracks whether the WebView loaded successfully.

**Expected result:** The Image or WebView widget is on your screen and configured. In Test Mode (web preview), the diagram should be visible — the WebView loads the live Lucidchart embed, and the Image widget shows your uploaded asset.

### 5. Test on a real device and handle offline and scaling edge cases

Click the Run button in FlutterFlow to test in the browser first, then test on a real device (or a local Android/iOS build) because WebView and image scaling can behave differently across targets. In the browser Test Mode, the WebView renders as an iframe and the diagram should be immediately interactive. On a physical phone or tablet, the WebView uses the native WKWebView (iOS) or WebView (Android) implementation, which may behave slightly differently with zoom and scroll.

For the Image widget: check that the diagram is crisp and not blurry. If it looks pixelated, go back to Lucidchart and re-export at a higher resolution (PNG 2x or 3x) or switch to SVG. Pinch-to-zoom on the InteractiveViewer should allow users to read fine details on dense diagrams.

For the WebView: verify that pan and zoom work. The embedded Lucidchart view supports touch-based pinch-to-zoom natively. Also test the offline scenario: turn off wifi/cellular on the device and open the screen — the WebView should show your error state widget rather than a blank or broken page. If you did not add an error state, do so now in the widget's conditional visibility settings.

Adjust the widget's padding, background color, and border if needed to make the diagram fit visually into your screen's design. Wide flowcharts look best in a full-width, horizontally scrollable container. Tall org charts work well in a vertically scrollable layout with a fixed aspect ratio at the top.

If you'd rather skip the widget setup and get professional help matching your app's design to your Lucidchart assets, RapidDev's team handles FlutterFlow integrations like this every week — free scoping call at rapidevelopers.com/contact.

**Expected result:** The diagram renders correctly on both web (Test Mode) and a real iOS or Android device, with working pan/zoom and a clear error state for offline scenarios.

## Best practices

- Use SVG export instead of PNG for any diagram with fine text or dense detail — SVG scales without quality loss on all screen sizes and device pixel densities.
- Add an error state widget to your WebView screen so users see a clear message ('Diagram unavailable offline') instead of a blank page when there is no internet connection.
- Before publishing a diagram publicly via the embed link, review it for sensitive information — internal roadmaps, security architectures, and confidential org chart data should not be publicly accessible via an anonymous embed URL.
- Use the same filename when re-uploading an updated diagram to FlutterFlow Assets so existing Image widget references update automatically without any reconfiguration needed.
- Add a visible refresh button on screens with a WebView diagram so users who have the screen open when you update Lucidchart can reload without closing and reopening the app.
- Wrap your Image widget in an InteractiveViewer widget to give users pinch-to-zoom and pan gestures on complex, high-detail diagrams like architecture maps or detailed flowcharts.
- Ship a static SVG image as an offline fallback alongside the WebView embed — show the Image widget when the device is offline and the WebView when connected to the internet.
- Test on a real device after every diagram update — WebView rendering and touch gestures behave differently in the browser Test Mode vs. a compiled iOS or Android app.

## Use cases

### Employee onboarding app with an interactive process flowchart

A company builds a FlutterFlow onboarding app for new employees that includes the company's hiring and equipment setup process diagram. The Lucidchart flowchart is published as a live embed so HR can update it in Lucidchart and the app reflects changes automatically without a rebuild.

Prompt example:

```
Add a screen called 'Onboarding Map' that shows our company process flowchart — the Lucidchart diagram should be zoomable and always show the latest version.
```

### Internal engineering app with a system architecture diagram

An internal FlutterFlow app for an engineering team includes a dedicated 'System Architecture' tab that renders the current infrastructure diagram exported from Lucidchart as an SVG. The SVG is crisp on all screen sizes and loads without an internet connection.

Prompt example:

```
Create a tab called 'Architecture' that displays our system diagram — it should look sharp on all device sizes including iPads and work offline.
```

### Client-facing app displaying a live org chart

A consulting firm builds a FlutterFlow app for a client that includes the client's org chart created in Lucidchart. The chart is embedded via a WebView widget so the client can update it in Lucidchart and the app always shows the current version without any app update being required.

Prompt example:

```
Show our current org chart on the 'Team' screen — it should always be up to date and users should be able to zoom in on names and titles.
```

## Troubleshooting

### WebView shows a blank white screen on iOS

Cause: iOS App Transport Security (ATS) blocks external web content loads unless explicitly allowed. This can affect the WebView's ability to load Lucidchart's embed URLs.

Solution: In FlutterFlow, go to Settings & Integrations → App Settings → iOS Settings and enable 'Allow arbitrary loads'. Rebuild the app and re-test on the physical device.

### Diagram image looks blurry or pixelated on a phone screen

Cause: A low-resolution PNG was exported from Lucidchart. Mobile screens — especially Retina and high-DPI displays — require at least 2x the logical pixel resolution to look sharp.

Solution: Go back to Lucidchart and re-export as SVG (resolution-independent and always crisp) or re-export as PNG at the highest available resolution (2x or 3x). Upload the new file to FlutterFlow Assets using the same filename to overwrite the old version.

### The published Lucidchart embed URL shows 'Access Denied' or a Lucidchart login prompt inside the WebView

Cause: The diagram's publish setting was changed to 'Private' or 'Restricted' in Lucidchart after the embed URL was generated, revoking public access to the embed.

Solution: Go back to Lucidchart, open the Share dialog for the diagram, and confirm the Publish status is set to publicly accessible. Save the change and reload the WebView in your app.

### WebView shows a blank or error page on Android but works in the browser (Test Mode)

Cause: The Android build may be missing the INTERNET permission in AndroidManifest, or the WebView component on the test device is outdated.

Solution: In FlutterFlow, go to Settings & Integrations → App Settings → Android Settings and confirm that the 'Internet' permission is listed. Add it if missing, then rebuild the APK. Also ensure the device's Android System WebView app is up to date via the Play Store.

## Frequently asked questions

### Does FlutterFlow have a native Lucidchart integration?

No. Lucidchart is not on FlutterFlow's native integrations list, which covers Firebase, Supabase, Stripe, RevenueCat, Google Maps, AdMob, and OneSignal. The correct approach is to embed your diagram as a static image in FlutterFlow Assets or as a live embed URL in a WebView widget. No API Group or Cloud Function is needed.

### Can I query Lucidchart diagram data from my FlutterFlow app?

Not for standard use cases. Lucidchart does have an enterprise REST API for account and admin management, but it is not designed for rendering live diagram content inside a mobile app. There are no public endpoints that return diagram elements as structured data you could bind to FlutterFlow widgets. The embed and image paths are the correct and honest approaches.

### Will the live WebView embed update automatically when I change the diagram in Lucidchart?

Yes — the next time a user opens or refreshes the screen, the WebView fetches the latest published version of the diagram from Lucidchart's servers. Changes you make in Lucidchart are immediately reflected in the embed URL. If the screen is already open when you make a change, the user needs to tap your refresh button or close and reopen the screen to see the update.

### Is it safe to publish my Lucidchart diagram publicly for the WebView embed?

It depends on the diagram's content. Publishing makes the diagram accessible to anyone with the embed link. Diagrams showing publicly shareable content — a product flowchart, a generic onboarding map — are fine. Diagrams with internal architecture, security details, personnel data, or confidential process information should stay private; in that case, use the static image path instead, which ships the diagram inside the app bundle without a public URL.

### Do I need a paid Lucidchart plan to embed diagrams in FlutterFlow?

No. The free Lucidchart plan allows you to publish and embed diagrams and supports up to three editable diagrams with unlimited view-only access. The free plan is sufficient for both the static export and the live WebView embed paths. Paid plans add more editable diagrams, advanced shape libraries, and collaboration features.

### What is the difference between using a static image and a WebView for a Lucidchart diagram?

A static image (PNG or SVG) is stored inside your FlutterFlow project, works offline, and looks consistent across all conditions — but updating it requires re-exporting from Lucidchart, re-uploading to FlutterFlow, and rebuilding the app. A WebView embed always shows the current published version and supports interactive pan/zoom, but requires an internet connection and shows an error if Lucidchart is unreachable.

---

Source: https://www.rapidevelopers.com/flutterflow-integrations/lucidchart
© RapidDev — https://www.rapidevelopers.com/flutterflow-integrations/lucidchart