AWS S3 For Flutter Web App

A project log for FIMble

Concept of a plug-and-play IoT food monitoring system. It aims to reduce food wastage at consumer and distributor level

zst123zst123 07/30/2020 at 08:390 Comments

When I created the Flutter Android App, I thought of cross-platform as one of my reasons for trying out Flutter. 

I read that Flutter Web is still in early support, however, it will be good to try it out. I want to see how to host it on Amazon Web Services itself.  If I can host my app on AWS, it will turn my project into a fully serverless and cloud-based concept.

Adding Web support to my Flutter App

To add web support, first I ran these commands in my flutter app directory. 

I followed this guide:

Run the commands:

$ flutter channel beta
$ flutter upgrade
$ flutter config --enable-web
$ flutter devices
$ flutter run -d web-server --release

Hosting on AWS S3

In the end, I chose AWS S3 as a suitable service because I realised that I can generate the Flutter app as a static webpage.

I followed this guide closely to set up the S3 bucket, permissions and properties:

Go to S3 console and create a new bucket

Under properties, I enabled static web hosting. I went with all the default settings

Here, we can see that it is enabled afterwards

We need to allow public access, so I went to permissions to edit the bucket policy.

I modified to have this bucket policy for my use-case:

  "Id": "PolicyForPublicWebsiteContent",
  "Version": "2012-10-17",
  "Statement": [
      "Sid": "PublicReadGetObject",
      "Action": [
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::cypress-psoc/*",
      "Principal": "*"

I then uploaded all the files from the build directory: ./flutter_fimble/build/web/

And as simple as that, my app is now hosted online live! It was way easier than I thought!