"Supabase Resize Image in Flutter: Transform URLs Guide"
Supabase resize image in Flutter: getPublicUrl with TransformOptions (width, height, quality, format), the render/image API, and responsive widgets.
Your users upload 4000×3000 photos, and your list view downloads every byte of them to render a 96-pixel avatar. That's the moment you need to resize images in Flutter with Supabase — not by downloading and shrinking them on-device, but by asking Supabase Storage to transform them on the fly: resize, crop, convert to WebP, and serve the exact pixels your UI needs. If you googled "supabase resize image flutter", here's the one-line answer: pass TransformOptions to getPublicUrl and Supabase serves a resized, cropped, WebP-converted rendition from its CDN — the original file is never touched. *Last updated: October 3, 2026* What you'll learn How to resize images in Flutter with Supabase TransformOptions The render/image endpoint: what Supabase does with your transform params Thumbnail and avatar patterns without any server-side generation step Converting to WebP/AVIF and tuning quality for smaller payloads Transformed signed URLs for private buckets with createSignedUrl A responsive Flutter widget that requests the right image size per device Supabase resize image in Flutter with TransformOptions The core API is one call. You pass transform options alongside the file path, and Supabase returns a URL that serves the transformed image — the original file is never modified: // lib/main.dart import 'package:flutter/material.dart'; import 'package:supabase_flutter/supabase_flutter.dart'; Future<void> main() async { WidgetsFlutterBinding.ensureInitialized(); await Supabase.initialize( url: 'https://xyzcompany.supabase.co', anonKey: 'sb_publishable_xxxxxxxxxxxx', // publishable key ); runApp(const MyApp()); } // lib/services/image_service.dart import 'package:supabase_flutter/supabase_flutter.dart'; class…