I have tried quite a number of hex editors and consider FlexHEX to be the best, all things considered. I would highly recommend it to anyone who needs a good hex editor.

Robert Bridges

I really have no bias whatsoever towards free- ware programs. I actually purchased FlexHex because I found this a better alter- native to freeware Hex Editors on the web.

Mark Burrell

FlexHex Editor: The Hex Editor For Professional Use

FlexHEX is a powerful and reliable hex editor program specially designed to help you securely inspect and edit binary files, OLE compound files, logical devices, and physical drives. This software is well-designed, stable, and packed with numerous features, all presented through an intuitive and user-friendly interface.

Have been looking a long time for a decent hexadecimal editor? Whatever your editing needs are, you will find that the FlexHex Editor continues to meet them. Created by and for software professionals, FlexHex combines advanced binary editing capabilities with the ease and flexibility. This feature-rich hex and disk editor will save many hours of manual effort every month and easily pay for itself in the first month alone.

There are several good hex editors out there, but the one I use is FlexHex from Heaventools. While there are many free hex editors I feel that you often get what you pay for, which is why I use a commercial one.

Don Parker,
Bridon Security

FlexHex is an essential tool for a wide range of tasks including inspecting binary output, editing raw data content in files or disks, analyzing the structure of proprietary closed-format data files or old data in unknown formats, resolving issues in executable files or flash drives, generating binary files for testing, handling massive data transfers, and much more. With capabilities that extend to low-level disk imaging, cloning, and beyond, FlexHex is a hex editor and viewer that is a must-have tool for anyone requiring these functionalities.

Features

Supports drives and files of unlimited size (up to the NTFS theoretical limit)
Edits contents of any file, memory area, logical disks and physical drives
Support for 64-bit operating systems
Support for multi-byte and Unicode character sets
Unlimited multilevel Undo and Redo: you are never at risk of losing your data
Support for OLE compound files, NTFS alternate streams, sparse files, and more!
Real-time tracking of the changes made to the file by another application
Fully customizable layout and colors
File / Selected area printing
more

With FlexHex, You Can

View and edit the hidden data the other hex editors won't even show you
Open, save, paste, or drag-and-drop hundreds gigabytes of data within a second
Edit files locked by the system or by another application
Import or export your binary data, or just drag-and-drop data to/from another applications
Save data in the compressed Zipped Image format
Validate and analyze data with Search, Replace, and Comparison tools
Keep track of your position with bookmarks, area lists, jump history, and other handy tools
Compute checksums (CRC-32, MD5, SHA-1, SHA-256) and browse COM classes

Check Out The Feature List Have A Look At ScreenShots
Getting Started with FlexHex Frequently Asked Questions

Get Started with a 30-Day Free Trial

This software has no disabled features. Try out the full functionality of this hex editor with many advanced functions.

Why is FlexHex Better Than the Other Hex Editors Out There?

FlexHex stands out among other hex editors due to its comprehensive capabilities tailored to software developers. FlexHex provides an intuitive framework for editing operations covering all needs you may have. This powerful yet simple to understand program helps you create, modify, inspect, search and replace binary, ASCII, or Unicode data. Advanced users will value its capability to search for strings and GUIDs, calculate checksums, and navigate COM classes.

FlexHex enables you to copy and paste a gigabyte large chunk of data in a split of a second. This is significantly faster than the competing hex editors.

Like any typical hex and hdd disk editor, FlexHex enables you to inspect, generate, and modify binary files located on local disks, devices, or network shares. Unlike other hex editors, FlexHEX provides full support for NTFS files, which are based on a more complex model than FAT32 files. Specifically, FlexHEX supports sparse files and Alternate Data Streams of files across all NTFS volumes. This means you can now audit your files for the existence of Alternate Data Streams and edit hidden data that other hex editors simply cannot see!

The special Hot Tracking feature lets you see the changes made by another application to a file. With FlexHEX, you don't need to reload the same file over and over again — instead, the program swiftly detects any alterations made to the file, immediately refreshing the Edit window. This feature is automatically activated for any file opened in read-only mode.

Start Editing Your Files Now!

FlexHex will run for 30 days but after that time you will need to buy a license. For maximum editing and inspecting power, purchase a FlexHex Business license now for $59.95.