FNDRY39 Forensics

Evidence first. Limits stated.

Two analysis tools for the questions people actually bring: where did this email really come from, and what does this writing’s pattern show? Each finding comes with the evidence behind it, how it was reached, and what it cannot prove.

Email Intelligence & Header Analysis

Where a message really came from — and how much of that can be trusted.

Paste an email’s original source or its headers. Read the delivery route hop by hop, the SPF, DKIM and DMARC verdicts the receiving servers recorded, every IP address with the part it played, and the sender, link and attachment tricks phishing relies on — each finding with its evidence and its limits.

What you can learn

Which server actually handed the message over, and which records the sender could have written
Whether the visible From address was authenticated, and by whom
Every IP address, classified, with optional registry, network and Tor lookups
Lookalike domains, mismatched reply addresses, links that lie, risky attachments

The message is analysed in your browser. Only if you choose to run lookups are the IP addresses and domain names — never the message — sent to our server.

Open Email Intelligence

AI Writing & Content Audit

What the writing’s patterns show — and why no tool can prove who wrote it.

Paste any text for a transparent reading of its patterns — sentence rhythm, stock phrasing, transitions, specific detail, style shifts — with every observation highlighted in your own words, plus an editorial audit that helps improve the writing whoever wrote it.

What you can learn

Which measurable features lean towards template-like or personal writing, with the arithmetic shown
The sentences behind each observation, highlighted in place
Sentence and paragraph variation, repetition, readability, tone and conventions
Concrete editorial suggestions, with your text left untouched

The audit runs in your browser. The optional AI editorial review, where it is enabled, sends the text to Anthropic only when you press its button, after saying so.

Open Writing Audit

How these tools stay honest

Analysis tools are easy to make impressive and hard to make truthful. These are built around what the evidence can bear.

Facts, verdicts and guesses are labelled apart
Every finding says whether it was read from your input, recorded by a mail server, looked up, or inferred.
Nothing is invented when a lookup fails
A failed lookup says it failed. No location is shown unless a provider is configured, and then only as an estimate.
No detector pretends to certainty
The writing audit shows measurable patterns and the arithmetic behind its reading. It never claims to detect AI.
Your input stays in your browser
Both analyses run locally. Network lookups and the optional AI review only run when you choose, after saying exactly what they send.

The Guide

Plain-English explanations of every term the tools use — from what an email header is to why no one can reliably detect AI writing.

Read the Guide

Want a quick check instead? The free Email Header Analyzer, URL Safety Checker and Text Analyzer in Programs do one job each.

Evidence first. Limits stated.

Tools

Email Intelligence & Header Analysis

AI Writing & Content Audit

How these tools stay honest

The Guide

Evidence first. Limits stated.

Tools

Email Intelligence & Header Analysis

AI Writing & Content Audit

How these tools stay honest

The Guide