https://apicourse.com/tags/file-upload/ Recent content in File Upload on API Course Hugo en-us Sat, 02 May 2026 00:00:00 +0000 https://apicourse.com/file-upload-and-download-apis-multipart-presigned-urls-and-chunked-transfers/ Sat, 02 May 2026 00:00:00 +0000 https://apicourse.com/file-upload-and-download-apis-multipart-presigned-urls-and-chunked-transfers/ <p>File handling is where many otherwise well-designed APIs cut corners. The result is integrations that work fine for small files and break under production conditions: uploads timing out on slow connections, downloads failing midway through large transfers, clients with no way to resume an interrupted operation. File upload and download have well-established patterns that handle these conditions correctly. Most of them require explicit design choices rather than the defaults.</p> <h2 id="simple-upload-when-it-is-sufficient">Simple Upload: When It Is Sufficient</h2> <p>For files under a few megabytes that users upload infrequently, a direct multipart form upload to your API is the simplest approach. The client sends a <code>multipart/form-data</code> POST request with the file as one part and any metadata as additional parts or as a separate JSON field:</p>