Example on Flutter Web uploading image

Can someone show an example of how to use Minio in Flutter Web ?
I am new and cannot find any example on it.
My goal is straight forward. In Flutter Web, pick an image with ImagePicker and upload to S3.
Thanks and appreciate for any expert assistance.

There is an example now: example/web_upload_example.dart. It shows the
upload half of a browser upload: the bytes of the file the user picked (read
with package:web or dart:html) are handed to putObject as a
Stream<Uint8List>, and the progress is reported. The example itself stays
free of dart:html, so it runs on the server too.

Two things to keep in mind on the web: the request is signed in the browser,
so the access key is visible to the user — use a presigned URL for anything
that matters, and make sure the bucket allows CORS for your origin.

This ships in zuraffa_minio — the maintained fork of this package, which upstream has not touched since August 2025.

The fork keeps the API of the original package unchanged, so moving over is an import swap:

// before
import 'package:minio/minio.dart';
// after
import 'package:zuraffa_minio/minio.dart';

Source, the changelog and the sweep of the open issues of this tracker: https://github.com/arrrrny/zuraffa_minio

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Example on Flutter Web uploading image #64

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arrrrny commented on Oct 22, 2026

arrrrny commented on Oct 22, 2026

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