Teams often ask to compare files online without spinning up a desktop app or granting a SaaS access to a private repo. SmartFlexa reads each selected .txt file with the browser’s FileReader API, injects the contents into the original and modified fields, and immediately renders the same highlighted table you would get from pasted text. Nothing is transmitted to our infrastructure for that read step.
Rich formats—Word, PDF, or spreadsheets—should be exported to plain text (or CSV saved as .txt) before diffing here so line breaks stay meaningful. After you review highlights, use Copy result to attach a unified diff to a ticket, or jump to the diff checker online landing page if that phrasing matches how your teammates search. The underlying widget is identical to SmartFlexa’s text diff checker.
For JSON or log files, consider normalizing with the JSON Formatter first so the diff emphasizes semantic edits instead of indentation noise.