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Where: the Media section, or Insert Media inside the composer Every file you upload or generate lands in the media library, so you can reuse it without hunting for the original.
The media library page

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What is in it

  • Files you uploaded from the composer or from this page.
  • Images and video generated by AI, see AI generation.
  • Media imported from a connected third-party service.

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Working with it

Results are paginated rather than infinite scrolling, so a large library stays usable.

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Limits

Images are capped at 10 MB each and video at 1 GB, and the accepted types are JPEG, PNG, GIF, WebP, AVIF, BMP, TIFF and MP4. Postiz reads the real type from the file contents, so renaming the extension does not help.

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Where library media is used

Besides posts, the library is the picker for:

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Deleting

Deleting removes the file from the library. Posts that already published are unaffected, since the platform holds its own copy. Scheduled posts still referencing a deleted file will fail at publish time, so check before removing anything recent.