Rich Text Format, a cross-platform formatted-text document format.
| 0x00000000 | 7B5C72746631 | {\rtf1 | '{\rtf1' header |
RTF encodes formatted text as plain ASCII control words, so it opens in almost any word processor and is a safe interchange format. Files begin with the literal '{\rtf1'.
Have a file that might be RTF? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.