4n6
Est. 2013 • Covina, California • 4n6 Inc
4n6 is a digital forensics tools and services company. We build the Windows software that gets evidence out of difficult file formats, for everyone from forensic examiners to a family rescuing old archives. Every tool is written and tested under one roof, then supported from the same desks, since 2013.
4n6 started in 2013 with one belief. The person answering your support question should be able to open the source code and fix the problem, not read from a script. That is still how we work. We are the direct developer of every tool in our catalogue. Support and updates come from the desks the software was born on. So do the bug fixes.
Our name comes from investigator shorthand. "4n6" reads as forensics. That discipline shapes everything we ship. Forensic work demands that originals stay untouched, that output can be verified and that a tool behaves the same way on the ten thousandth file as it did on the first. We build to that bar even in our simplest free viewer.
Today the catalogue covers 179 Windows tools across email forensics, file conversion, data recovery, backup and free viewers, supporting more than 2,500 file types in 20+ languages. You will find our tools on our own site, in the Microsoft Store and on download portals like CNET Download and Software Informer.
What direct developer support means in practice
Live chat and email reach engineers who work on the products daily, not an outsourced call centre
A reproducible bug reported today lands in the same codebase we ship from, so fixes arrive in updates rather than apologies
Unusual files from real support cases feed our test corpora, which is how the tools learned to handle the scenarios other software rejects
Lifetime free updates on licensed tools, because a format we support stays supported
A converter is only as honest as its testing. Our lab process is why the benchmark tables on our product pages exist and why we publish them.
Binary Format Research
We study file formats at byte level, including formats their makers stopped documenting decades ago, like the AOL Personal Filing Cabinet. That research is why our tools open files the original software refuses.
Real File Corpora
Releases are tested against libraries of real world files spanning every version of a format, not clean lab samples. A 1990s file sits in the same test run as one saved last week.
Damage Scenarios
We deliberately feed the tools truncated, corrupted and oversized files, because that is what real recovery work looks like. Failure cases become parser improvements.
Published Benchmarks
Accuracy numbers, corpus sizes and timing runs go straight onto product pages like our Publisher Converter. If a claim cannot survive publication, it does not ship as a claim.
Most of the files people bring us are not case exhibits. They are a grandfather's emails, a church's newsletters, a business's only price list. The forensic standard exists for the courtroom, but its real gift is that it treats every file like it matters. Because to someone, it does.
The Widest Format Reach
More than 2,500 file types across 179 tools, including formats that no longer have living software behind them. If a file exists, chances are one of our tools reads it.
Support From the Builders
The person who answers your question can open the source code. No outsourced tier one, no scripts. That single fact changes how fast a real problem gets solved.
Built for Casework Volume
Batch engines run whole folders in one pass, not one file at a time. An archive that would take a day of clicking somewhere else finishes in a single supervised run.
Thirteen Years of Refinement
These are not new tools chasing a trend. Many have been rebuilt across a decade of real support cases, so the edge cases that break other software are the ones ours expects.
One Licence, Many Outputs
A single converter often writes six formats. Buy the tool once and it keeps serving every destination you need later, with free updates for as long as the format lives.
Right for Experts and First Timers
The same tool a forensic examiner trusts in casework is simple enough for someone opening one old file. Advanced options are there when needed and out of the way when not.
Most companies in this space sell software or sell expertise. We have always done both. Each side makes the other sharper.
Digital Forensics Tools
179 Windows applications covering email forensics and conversion, file format recovery, data backup, splitters, mergers and a large family of free viewers. The catalogue reads formats from PST, OST and MBOX to Publisher, PFC and databases, with batch engines built for casework volume. Every installer is digitally signed and every conversion runs offline on your own machine.
Digital Forensics Services
Beyond the software, our team works directly with law enforcement agencies, forensic examiners and corporate investigators. We provide tool training and casework guidance on email evidence and file recovery, plus custom conversion support when an investigation meets a format nobody else reads. The people delivering these services are the same engineers who build the tools.
The 4n6 Catalogue by Category
179 tools in nine families. Converters carry the flag and the 25 free viewers ask for nothing in return.
2013
4n6 is founded
The first tools focus on email forensics, built for investigators who needed evidence out of mail formats without altering a byte of the original.
The Growth Years
From email into every trapped format
Support cases kept arriving about files nothing could open. Each one pushed the lab into a new format family, from databases and contact files to the formats software vendors simply left behind.
Today
179 tools, one standard
The catalogue now serves users in more than 120 countries, from home users rescuing family archives to agencies processing casework. The founding rule has not moved. Originals stay untouched and output must verify.
The loop never closes. Files from support cases in 120+ countries keep teaching the lab what the real world saves to disk.
The first thing people check about a software company is whether it is safe to download from. Fair question. Here is our answer, in writing.
Offline by Design
Our tools run on your PC and nothing uploads anywhere. Evidence, client files and family archives never take a trip through someone else's server.
Originals Stay Untouched
Source files open read only across the whole catalogue. It is the habit that keeps a chain of custody intact. The same habit protects a family archive exactly as well as it protects electronic evidence headed for court.
Signed and Clean Installers
Every installer carries our digital signature, is recognised by Microsoft SmartScreen and ships without bundled extras. What you download is the tool and only the tool.
Try First, Risk Nothing
Free trials show real output before any payment and every paid licence carries a 30 day money back guarantee. The software has to earn its keep on your files.
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