Email Header Analyzer

Paste the raw headers of an email (or the whole message source) to see who sent it, the path it took, how long each hop lasted, whether SPF, DKIM and DMARC passed and what may deserve a closer look. Everything is parsed locally: nothing leaves your browser.

Headers

Results update as you paste. Nothing leaves your browser.

Or open an .eml or .txt file: it is read locally, never uploaded.

Drop a file here or click to choose one Any type and size. The file is read locally and never uploaded.

Paste email headers, open a file or load the example to analyze them.