Free, browser-based utilities for everyday developer workflows

Fake Email Sender Checker

Security Tools

Inspect a copied sender line locally to spot brand impersonation, domain mismatches, and display-name spoofing before you trust the message.

  • Paste a suspicious link, sender, domain, raw header, or copied message text.
  • The tool automatically detects the input type and runs local checks.
  • No URL is fetched, opened, or rendered as a clickable result.
Runs locally

Inspect suspicious content

Runs in your browser. Your pasted content is not sent to a server.

Not sure? Just paste it above. We will detect it automatically.

Safe example gallery

How to use the Fake Email Sender Checker

Paste a sender line or display-name email to see whether the visible name matches the actual sender domain. It is useful for spotting impersonation before you reply or click.

What it does

  • Compares the display name with the actual sender domain.
  • Surfaces brand impersonation and ASCII look-alike patterns.
  • Helps distinguish a valid sender from a spoofed one locally.

When to use it

  • The sender name looks familiar, but the email address seems odd.
  • You want a quick check before trusting a support or payment message.
  • A copied sender line includes a brand name and a suspicious domain.

How to use it

  1. Paste the sender line or email address into the input.
  2. Add a trusted domain if you know the real sender host.
  3. Run Analyze locally and review the sender evidence.
  4. Open the email findings panel to inspect header mismatches if present.

FAQ

  • Does this tool fetch suspicious links? No. All analysis runs locally in your browser and the tool does not open or fetch pasted URLs.
  • Can I paste raw email headers? Yes. Paste raw headers and the inspector checks From, Reply-To, Return-Path, Authentication-Results, and related spoofing indicators locally.
  • Does the inspector send my input to a server? No. Everything stays in your browser. Nothing you paste is sent to a server or third-party API.
  • What kinds of spoofing does it look for? It looks for invisible characters, bidi controls, mixed scripts, confusable domains, Punycode hostnames, misleading subdomains, credential-in-URL tricks, and sender mismatches.
  • Can it compare a suspicious value against a trusted domain? Yes. You can enter an optional trusted domain so the inspector can compare the pasted content against a known-good brand or host locally.

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