01
Match the file header to its first raw bytes
Search for the PNG signature and compare it with the bytes at offset 00000000 before reading deeper into the dump.
Hex ViewerDeveloper & Data
Read what a file actually contains, byte by byte.
Hex Viewer pairs offsets, raw hexadecimal bytes, and printable ASCII in a selectable local dump. Search for a byte signature or ordinary text, confirm the first match offset, and inspect unfamiliar or damaged files without uploading them to a web utility.
Start the 14-day trial in the app. No payment method is required to try Foldout.
Local tool processingFiles and tool work stay on your Mac.
100+ focused toolsFiles, PDFs, media, capture, and developer workflows.
Settings ready to goFormats, dimensions, and other values carry into the tool.
Try everything first14 days in the app. No payment method required.
What it does
Inspect raw file bytes and prove signatures or embedded text with precise offsets.
View offsets, hexadecimal bytes, and ASCII side by side.
Search with a hex sequence or ordinary text.
See the match count and first exact byte offset.
Copy the dump for a report or deeper analysis.
Cap the rendered window so large files stay responsive.
Signature to structure
Prove the bytes first, then inspect the file row by row.
A real PNG signature match leads directly into aligned offsets, hexadecimal bytes, and printable ASCII.
02
Read offsets, raw bytes, and ASCII side by side
Inspect the capped file window in a selectable monospaced dump, with every row aligned from byte offset through hexadecimal values to printable text.
Why it belongs
Why Hex Viewer earns a place in the toolbox.
The practical details that make this job faster, clearer, or safer than doing it by hand.
Recognize real file signatures
Check magic bytes such as a PNG header instead of trusting an extension that may be wrong.
Search in the representation you have
Use spaced hex bytes for binary patterns or switch to text when the value is readable.
A dump designed for comparison
Aligned offsets, byte columns, and ASCII make structure and anomalies easier to spot.
How to use it
From opening the tool to saving the result.
- 01
Choose any readable file.
- 02
Search for a signature or text when useful.
- 03
Review the aligned hex and ASCII dump.
- 04
Copy the evidence you need.
Questions
Before you try Hex Viewer
Does Hex Viewer edit files?
No. It is an inspection tool.
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