Liran Tal • 10/14/2025

Building Cloudflare R2 Pre-signed URL Uploads with Hono: A Complete Implementation Guide

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This technical tutorial provides a complete implementation guide for building secure file upload functionality using Cloudflare R2 (an S3-compatible object storage) and the Hono framework for the backend API. It covers generating pre-signed URLs for direct frontend-to-storage uploads, addresses common pitfalls like runtime compatibility issues with the AWS SDK in Cloudflare Workers, and includes steps for environment setup, testing, deployment, and frontend integration with a Vue.js example.

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#TypeScript #File Uploads #Cloudflare R2
Building Cloudflare R2 Pre-signed URL Uploads with Hono: A Complete Implementation Guide

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