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A Flutter package for converting between MIME types and file extensions with wildcard support and base64 file type detection via magic bytes.
Last release 7 months ago
10 Mar 2026
Too new to tell
only 2 release windows
Nearly every release is documented
notes for 5 of 5 stable releases
Nothing withdrawn
no release was ever pulled
10 months old
5 releases · first in 2025
One column per month.
OLE2 Compound Binary Format sub-format detection — differentiates DOC, XLS, PPT by scanning for UTF-16LE directory entry stream names (Workbook, Book,
base64ToExtension(String base64Data) — detect file extension from base64-encoded data using magic bytes
base64ToExtension(String base64Data) — detect file extension from base64-encoded data using magic bytesbase64ToMime(String base64Data) — detect MIME type from base64-encoded datadata:...;base64, handled transparently)### Changed - Add example
Updated LICENSE to BSD-3-Clause (Flutter Authors)
Initial release of mime2extension package
extension2Mime(String extension) function to convert file extensions to MIME typesmime2Extension(List<String> mimeTypes) function to convert MIME types to file extensionsapplication/* returns all application extensions)Your coding agent can read these notes before it upgrades. Set up the MCP server →