Email Header Analyzer

What is Email Header Analyzer?

Email Header Analyzer is a free, browser-based tool that helps you understand a dataset at a glance. Parse raw email headers — SPF/DKIM/DMARC results and delivery hops. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

Used by

• Email marketers
• Deliverability teams
• IT admins
• Support teams
• Analysts
• Researchers

Recommended workflow

1. 1

   Prepare the input

   Profile the data first so missing values, types, duplicates, and outliers are visible before you edit it.

2. 2

   Run Email Header Analyzer

   Review the preview, copy or download the result, and keep everything local in your browser.

3. 3

   Next recommended tool

   SPF Record Generator: Build a valid SPF TXT record from your senders and policy.

   Open tool
4. 4

   Then continue with

   DKIM Key Generator: Generate an RSA-2048 DKIM key pair and DNS record in your browser.

   Open tool
5. 5

   Then continue with

   DMARC Record Generator: Build a DMARC policy TXT record with reporting addresses.

   Open tool

Frequently asked questions

How do I use Email Header Analyzer?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Parse raw email headers — SPF/DKIM/DMARC results and delivery hops.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is Email Header Analyzer free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.