FossFLOW Hosting Live In 5 Minutes

Deploy FossFLOW hosting and run a self-hosted isometric diagram editor for infrastructure and architecture maps on your own domain. xCloud starts the pinned community image behind HTTP Basic authentication, generates the password, and keeps diagrams as JSON files on a persistent volume, so they survive across devices. It is a Progressive Web App built with React, with export and import as JSON.

Deploy your FossFLOW

No terminal
No technical skills needed
No lock-in, cancel anytime

What is FossFLOW?

FossFLOW is an open-source Progressive Web App for creating isometric diagrams, built with React and the Isoflow library and released under the MIT licence. Upstream describes quick save to the browser session, export as a JSON file, import from a JSON file and auto-save every few seconds. The repository read here is a continuation fork of stan-smith's FossFLOW. Self-hosted FossFLOW is the option for teams that would otherwise draw architecture maps in a hosted tool such as Lucidchart or Miro.

On xCloud the template runs the community abrar74774/fossflow image matching release v1.0.4, pinned by digest, as one container behind nginx with HTTP Basic authentication on the UI and the API. Server storage is on, so each diagram is saved as a JSON file under /data/diagrams on the fossflow_diagrams volume. Git backup is not implemented upstream. Requests are limited to 10 MB.

From Sign-Up to a Live Diagram Workspace In Just 3 Easy Steps

Self-hosting FossFLOW normally means a container, a login wall in front of it, persistent storage for diagrams, a domain and a certificate before a single shape is drawn. This is the same result without assembling any of it by hand.

Step 01
Sign Up
Create your xCloud account and pick FossFLOW from the OneClick catalog. Select a domain and set the HTTP Basic username — it defaults to admin.
Step 02
We Deploy It For You
One click. We bring up the pinned FossFLOW 1.0.4 image, bind the container port to loopback only, require HTTP Basic authentication with a generated 24-character password in front of the editor and its /api, mount fossflow_diagrams, and publish it over HTTPS on your domain.
Step 03
Sign In And Save A Diagram
Open your HTTPS URL and sign in with the username you chose and the generated password from your xCloud credential panel. Create a diagram and save it to Server Storage so it's available from other browsers and devices.

Everything FossFLOW Does, On Your Own Server

FossFLOW runs in full here — its isometric diagram editor and server-saved diagrams, on infrastructure you control.

Isometric Diagram Editor
Draw infrastructure, network and architecture maps as isometric diagrams directly in the browser, built on the Isoflow library.
Diagrams Saved To Your Server
Save to Server Storage and the same diagram opens from another browser or device, instead of staying trapped in one tab.
Whole Site Behind HTTP Basic Sign-In
Every request to the editor and its API is checked against your generated credentials — unauthenticated requests are rejected.
Free And Open Source
MIT licensed, with no per-seat fees — you're paying for the managed server it runs on, not the software.
A Light Footprint
A single container asking for just 1 CPU and 256 MB of RAM, leaving real headroom on any plan.
Diagrams Survive A Restart
Saved diagrams stay in the persistent volume and were still listed and loadable after a container restart in verification.

Everything You Need To Run Your Diagram Workspace 24/7

Managed hosting for FossFLOW, so the parts that keep it online are not your problem.

FossFLOW 1.0.4 deployed instantly
Pinned community image digest
24-character password generated for you
Container bound to loopback only
Free SSL certificate
Server backups and snapshots
Server security updates included
30+ server locations
Unused balance refunded

What You Can Do With FossFLOW

Map your infrastructure
Draw servers, networks and services as an isometric picture and export it for a runbook or a design review.
Keep diagrams across devices
Save diagrams to the server volume so you can continue on another laptop after signing in, instead of relying on one browser.
Document an architecture decision
Create a clear picture of a proposed system and attach the exported JSON or image to your decision record.
Run a private diagram tool for a team
Put the editor behind Basic Auth on your own domain so the architecture diagrams never sit in a vendor's workspace.

FossFLOW vs Alternatives

Lucidchart: If your team draws diagrams in Lucidchart, FossFLOW is the self-hosted route for isometric infrastructure pictures: files on your own Cloud VPS, behind Basic Authentication.
Excalidraw: Excalidraw has no OneClick page here. FossFLOW is aimed at isometric infrastructure diagrams and keeps them on a server volume, which is a different job from a freehand whiteboard.
draw.io: draw.io has no OneClick page here. FossFLOW specialises in isometric infrastructure diagrams and saves them as JSON on a volume, with one Basic Auth login in front.
Drawnix: Drawnix has its own xCloud page as a whiteboard for mind maps and flowcharts. FossFLOW focuses on isometric infrastructure diagrams and, with this template, saves each one as JSON on a server volume.

Simple Pricing. Everything Included.

Dedicated Cloud VPS sizes, pre-configured for FossFLOW. Pick the one that fits, and resize any time.

Cloud VPS 6 GB

Cloud VPS 16 GB

More diagrams and heavier browser sessions at once.

$59.99per month

16 GB RAM
6 vCPU cores
200 GB NVMe SSD
30 TB
Unlimited

Get started

Cloud VPS 24 GB

FossFLOW alongside a whole self-hosted productivity stack.

$84.99per month

24 GB RAM
8 vCPU cores
300 GB NVMe SSD
30 TB
Unlimited

Get started

Every size is a dedicated Cloud VPS we provision, patch, monitor and restore. Billed monthly with no lock-in — delete the server and the unused balance comes back to your account. FossFLOW itself is free under the MIT license.

Docker hosting

Already Have a Server? Bring Your Own

Connect any VPS — DigitalOcean, Vultr, Linode, AWS, Hetzner or bare metal — and deploy FossFLOW on it through the same panel, for a per-server management fee instead of a Cloud VPS rental.

Free

Start your journey without cost.

$0forever

1 server
10 sites

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Starter

Professional

The same platform, discounted at 6–10 servers.

$4per server / month

6–10 servers
Unlimited sites
All features included
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Agency

The same platform, discounted at 11+ servers.

$3per server / month

11+ servers
Unlimited sites
All features included
Bring any VPS provider

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Priced per connected server, so your rate adjusts automatically as you add or remove servers. You pay your own provider for the server itself.

Self-managed hosting

Ready To Own Your Diagram Workspace?

FossFLOW hosting on xCloud runs on a dedicated Cloud VPS that we provision, patch, monitor and restore. Deploy faster. Own the server. Stay in control.

Fast Provisioning
Deploy faster using an xCloud Managed Server built with optimized stacks and high-speed SSDs.
Enterprise-grade security
Protect your infrastructure with a free SSL certificate and more advanced security features at no additional cost.
Intuitive Control Panel
From Server creation to application deployment, everything can be managed from our intuitive control panel.

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Frequently Asked Questions

Feel free to contact us with any questions or concerns you may have.

What is FossFLOW used for?

FossFLOW is used to draw isometric diagrams, usually of infrastructure and software architecture. You place blocks on an isometric grid, connect them, label them and export the result. It runs in the browser as a Progressive Web App, so there is nothing to install on the machines that use it.

Is FossFLOW free and open source?

Yes. FossFLOW is open source under the MIT licence, so the editor has no licence fee. You pay xCloud for the dedicated Cloud VPS and for the deployment. The image used is a community-published build of the repository, not an image published by xCloud.

Can you self-host FossFLOW with Docker?

Yes. For FossFLOW Docker hosting the template runs the community abrar74774/fossflow image that matches v1.0.4, pinned by digest, as one container with a named diagrams volume and HTTPS on your domain. Docker Hub has no 1.0.4 tag, so the pin uses the build tag with the same digest.

How much RAM does FossFLOW need?

FossFLOW's manifest floor is 256 MB of RAM, one core and 2 GB of disk, since it is one light container with a small Node backend. The 6 GB plan here leaves a great deal of room. Requests and uploads are limited to 10 MB by both nginx and the backend.

Where does FossFLOW store my diagrams?

With server storage on, which this template requires, each diagram is saved as a JSON file under /data/diagrams on the fossflow_diagrams volume, so it is reachable from other browsers and devices after you sign in. Without server storage, diagrams would live only in a browser session.

Can I export and import FossFLOW diagrams?

Yes. Upstream lists Export, which downloads a JSON file, and Import, which loads a JSON file, as the permanent way to keep a diagram. Quick save only keeps a session copy that clears when the browser closes, so export anything you care about or rely on the server volume.

How do I sign in to FossFLOW?

Open your address and sign in with HTTP Basic authentication, using the username you chose at install and the generated 24-character password on your credentials panel. There is no in-app user management. Change HTTP_AUTH_USER or HTTP_AUTH_PASSWORD in the Environment editor and redeploy; nginx rewrites the password file at each start.

How do I back up FossFLOW?

Back up the fossflow_diagrams volume, which holds every diagram as an individual JSON file. Keep ENABLE_SERVER_STORAGE set to true, because any other value stops the backend and the API returns 502. Copy the volume off-server and test a restore. Exported JSON files are a second copy.

Backups in xCloud

How do I upgrade FossFLOW?

Release v1.0.4 stays fixed by digest, so a refreshed catalog entry leaves the running diagram editor as it is, and a newer upstream tag exists. Back up the diagrams volume, check that the new release has a published image, and select a later template version. Git backup is not implemented upstream.

Can several people edit one diagram?

Not at once. FossFLOW stores diagrams as files and does not offer live collaboration. People who share the Basic Auth login can open the same saved diagrams from the server, but concurrent edits can overwrite each other, so agree who edits what or export copies.

Can I run FossFLOW in the cloud on xCloud?

Yes. FossFLOW cloud use puts the container on a dedicated Cloud VPS on your domain with a certificate. A server you rent elsewhere can be enrolled as self-managed. The app is usually ready within about twenty seconds of starting, with no database migrations.

Can I cancel anytime?

Yes. There is no lock-in — cancel any time. Hosting is billed monthly and charged for what you actually use, so when you delete the server the unused balance is refunded to your account, less up to 10% in payment-processing fees.