A file / image / paste upload server with a focus on embedding.

You can use contented as a standalone upload server, or you can use the SDK to embed its upload widget into another website.

The name is a pun on "content" and the -d suffix for server daemons.


  • Use local disk or S3-backed storage
  • Drag and drop upload
  • Multiple files upload
  • Pastebin upload
  • Custom drawing upload (via drawingboard.js)
  • Ctrl-V upload
  • Galleries and nested galleries
  • SDK-oriented design for embedding, including CORS support
  • Mobile friendly HTML interface
  • Preserves uploaded filename and content-type metadata
  • Hash verification (SHA512/256)
  • Detect duplicate upload content and reuse storage
  • Options to limit the upload filesize, upload bandwidth, and maximum source filesize for thumbnailing
  • Short URLs (using Hashids algorithm)
  • Image thumbnailing
  • Optional multi-tenant binary (contented-multi)

Usage (Server)

Usage of contented:
  -concurrentthumbs int
        Simultaneous thumbnail generation (default 16)
  -data string
        Directory for stored content (default ".")
  -db string
        Path for metadata database (default "contented.db")
        Save files as 0644 instead of 0600
        Enable homepage (disable for embedded use only) (default true)
        Enable uploads (disable for read-only mode) (default true)
  -listen string
        IP/Port to bind server (default "")
  -max int
        Maximum size of uploaded files in MiB (set zero for unlimited) (default 8)
  -speed int
        Maximum upload speed in bytes/sec (set zero for unlimited)
  -title string
        Title used in web interface (default "contented")
        Trust X-Forwarded-For reverse proxy headers

If you are hosting behind a reverse proxy, remember to set its post body size parameter appropriately (e.g. client_max_body_size for nginx).

Usage (HTTP)

The server responds on the following URLs:

URL |Method |Description ---------------------|-------|--- /get/{ID} |GET |Download item content /p/{ID} |GET |Preview item content (HTML) /p/{ID}-{ID}-... |GET |Preview multiple item content (HTML) /info/{ID} |GET |Get item content metadata (JSON) /thumb/{Type}/{ID} |GET |Get item thumbnail image (JPEG). "Type" should match [sbtmlh]. /about |GET |Get server metadata (JSON)

Usage (Embedding for web)

Your webpage should load the SDK from the contented server, then call the contented.init function to display the upload widget over the top of an existing DOM element:

<script type="text/javascript" src="SERVER_ADDR/sdk.js"></script>

You can optionally supply additional ordered parameters to contented.init:

  1. A callback, that will be passed an array of file IDs of any uploaded items
  2. A callback, that will be called if the SDK widget is closed


2023-05-20: 1.5.1

  • Improve support for albums with no images, and for albums with missing interior images

2023-05-19: 1.5.0

  • Feature: Support S3-backed storage
  • Feature: New contented-multi binary to host multiple server configurations from a single process
  • Enhancement: Better client-side caching for thumbnails
  • Option to cap source filesize for thumbnailing (default 20MiB)

2023-05-17: 1.4.0

  • BREAKING: Remove support for some old web browsers (require jQuery 3, ES6 template literals, Promises, Canvas.toBlob)
  • Feature: Initial album support with custom titles
  • Feature: Support readonly mode
  • Enhancement: Use lazy-loading for large image galleries
  • Enhancement: Better tab titles on preview pages
  • Fix an issue with continuing server-side thumbnailing work even if the http client has gone away
  • Fix an issue with not warning on colliding hashIDs
  • Internal: Refactor the SDK's initialization phase
  • Internal: Update bolt library dependency

2020-07-25: 1.3.1

  • Fix an issue with dependencies causing failure to compile in Modules mode

2020-07-25: 1.3.0

  • Feature: Option to limit concurrent thumbnail generation
  • Enhancement: Set charset=UTF-8 when serving user-submitted text/plain content
  • Fix an issue with large memory usage for multipart file uploads

2018-06-09: 1.2.1

2017-11-18: 1.2.0

2017-10-15: 1.1.0

  • Feature: Drawing mode
  • Feature: Ctrl+V image upload
  • Feature: Option to trust X-Forwarded-For headers when using a reverse proxy
  • Feature: Add getDownloadURL, getInfoJSONURL, getPreviewURL SDK methods
  • Feature: Option to disable uploading via the homepage
  • Feature: Add button to repeat when uploading from homepage
  • Enhancement: Automatically load library dependencies
  • Enhancement: Display homepage widget using the full screen size
  • Include drawingboard.js 0.4.6 (MIT license)
  • Fix a cosmetic issue with javascript console output
  • Fix a cosmetic issue with error messages if an upload failed
  • ⬇️ contented-1.1.0-win32.7z (1.11 MiB)
  • ⬇️ (142.82 KiB)
  • ⬇️ contented-1.1.0-linux64.tar.gz (1.67 MiB)

2017-10-08: 1.0.1

2017-10-08: 1.0.0