CMS Max Form Upload Limits

CMS Max Help Center / Forms

Accept the files your workflow needs while keeping size, type, privacy, and review responsibilities explicit.

CMS Max file-upload fields accept one file per field, up to 50 MB, store submissions privately, and validate against the platform extension list.

CMS Max Form Upload Limits CMS Max interface and guidance visual
CMS Max administration workspace. Available controls depend on the site, role, plan, theme, and installed plugins.

Accept the files your workflow needs while keeping size, type, privacy, and review responsibilities explicit.

CMS Max file-upload fields accept one file per field, up to 50 MB, store submissions privately, and validate against the platform extension list.

Current upload behavior

Each file-upload field accepts one file with a maximum size of 50 MB. Add another upload field when a workflow needs more than one document. Uploaded submission files use private storage and remain available to authorized administrators through the form workflow.

Accepted extensions

  • Images: jpg, jpeg, png, gif, webp, svg, avif, tif, tiff
  • Video: mov, mp4, avi, mkv, webm, m4v
  • Audio: mp3, wav, ogg, flac, aac, m4a, m4b, m4p, m4r
  • Documents: pdf, doc, docx, xls, xlsx, ppt, pptx, odt, ods, odp, txt, csv, rtf
  • Archives: zip, sit
  • 3D and CAD: step, stp, stl, iges, igs
  • Design and publishing: qxd

Before publishing the form

  • State the allowed file types and 50 MB limit beside the upload field.
  • Collect only files the business has a defined need and retention policy for.
  • Test a valid file, an unsupported extension, and an oversized file.
  • Treat file extensions as one control, not proof that uploaded content is safe or appropriate.

Turn the guide into a verified website change.

CMS Max can help confirm scope, configuration, integration boundaries, and launch testing for the actual site.

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