To view blob fields in oracle , first, you need and install OraLobEditor.
Use OraLobEditor, you can view Oracle BLOB visually, do not need program with PL/SQL (or other program languages) to convert BLOB data to file.
And you can save BLOB data to file and view also.
Easy to use
Easy to view image data in BLOB field.
Support common image formats (JPEG, GIF, BMP, PNG, TIFF, and more).
Calling external tool to use more powerful editing functions.
By Using external tool, we can edit or play some complex data, e.g. pdf, word, xls(Excel) …
Hexadecimal mode to edit BLOB data, especially for unknown type data.
We can edit long string(Char,Varchar2) data in hex mode also.
OraLobEditor is a database tool that can view Oracle BLOB data directly.