HTTP and HTTPS File Transfer

More files move over HTTP and HTTPS than over every classic transfer protocol combined. Every browser upload, API call, and cloud-storage operation rides the web's protocol. For administrators, HTTPS transfer is the client-less option: nothing to install, nothing to configure on the far end, just a link that works.

This series covers the web path properly: what actually happens during an upload, and the curl and wget patterns worth keeping. It covers how presigned URLs grant temporary access without accounts, and strategies for large files on flaky connections. It offers an honest comparison of when HTTPS beats SFTP — and when it doesn't.

It also covers the server side of the question. An HTTP file server on Windows, a server that lets people fetch and drop files through a browser, is either a purpose-built file-drop page or the HTTPS interface of a file transfer server; building a safe internal file-drop and when HTTPS beats SFTP cover both routes.

Articles in This Series

• How File Upload Works on the Web: Multipart, PUT, and Chunks
  What the browser actually sends, size limits at every layer, and where uploads fail.
• curl and wget for File Transfer: The Admin's Cookbook
  Auth, resume, retries — twenty worked one-liners.
• Presigned URLs: Temporary, Credential-Free Transfer Explained
  How signing works, its security limits, and the use cases where it shines.
• Large Files Over HTTP: Resumable and Chunked Upload Strategies
  Range requests, chunking, integrity, and designing for flaky connections.
• When HTTPS Beats SFTP: Choosing Web-Based Transfer
  The client-less advantage, what you give up, and a decision matrix.
• Building a Safe Internal File-Drop Over HTTPS
  The DIY drop point done responsibly — and where DIY should stop.
• Files Over REST APIs: Designing and Consuming File Endpoints
  Upload/download patterns, streaming vs buffering, and scripting third-party APIs.
• FTP in a Web Browser - What Still Works and the HTTPS Option
  This article starts from the FTP link that no longer opens. It explains why browsers dropped FTP, what still opens an FTP site, the two meanings of an FTP server with a web interface, HTTPS versus FTP, how browser-based transfer works, and what to check before offering a web interface.

Explore More Topics

This series is part of the Sysax file transfer topic library. The library covers the protocols, security practices, automation techniques, and operational skills behind reliable file transfer. The library pairs well with the practical tools we build. Sysax Multi Server is a secure FTP, FTPS, SFTP, and HTTPS server for Windows. Sysax FTP Automation schedules and scripts secure transfers so the routine ones run themselves.