Validate plain text or an uploaded file before submitting it for a formatted text check. The endpoint parses the content, counts words and pages, checks UTF-8 and text length constraints, and applies language/letter-percentage validation.

A text over the maximum length (1048576 symbols) is a blocking failure returned with code: 5, words and pages. It is not affected by skip_english_words_validation or skip_percentage_words_validation, which waive the language and letter-percentage rules only.

This endpoint does not charge the account or create a text check. If group_id is supplied and the group disables language validation, the language and letter-percentage validations are skipped.

{
  "text": "Some valid text with enough words and characters to pass the formatted text validation step before a user submits the final plagiarism check.\n",
  "filename": "draft.txt",
  "group_id": 100,
  "custom_author": "Student Name"
}

{
  "success": true,
  "words": 18,
  "pages": 1
}