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Byte Endianness Converter

Reverse bytes inside 16-, 32- or 64-bit words while retaining word order, with before/after hex tables.

Browser processingNo tool account neededTXT · CSV · JSON exports

1Start with your input
2Adjust the options
3Review & download

1Prepare & customize

Hexadecimal bytes

Combined text limit: 200,000 characters; at most 5,000 result rows. Results are generated in a background worker with a 15-second limit.

Open input or save a project

Open UTF-8 text in the first inputOpen this tool’s saved project

A project contains both input fields and options. Nothing is saved automatically. Keep private inputs out of files you share.

2Review your result

Ready. Try the example.

Text result & clipboard

Full generated text

Read the result notes before using exported files. SVG paper sizes require actual-size printing; browser fit-to-page can change scale. HTML downloads are self-contained reports, not live projects.

How to use Byte Endianness Converter

Load the example to see the expected input format: Hexadecimal bytes.
Adjust the named options for your task. Open a UTF-8 file if that is easier than pasting.
Choose Create result. Review the table, preview and tool-specific notes; changing an input clears the previous result.
Download the full result or a printable report. Save a project to reopen these inputs and settings later.

What this tool focuses on

Reverse bytes inside 16-, 32- or 64-bit words while retaining word order, with before/after hex tables. Combined text limit: 200,000 characters; at most 5,000 result rows.

The displayed table shows up to 100 rows at a time; exports include all supported rows. Parsed JSON uses JavaScript numeric precision, so exact large identifiers should be strings. No input is fetched from a URL or uploaded for this processing. Site advertising and analytics are described in the privacy information.

Using Byte Endianness Converter

Reverse bytes inside 16-, 32- or 64-bit words while retaining word order, with before/after hex tables.

Start with the example or enter hexadecimal bytes.
Adjust the available options and create the result.
Review tool-specific notes, then download a report or save your project.

Example

12 34 56 78 AB CD EF 01

Questions & answers

What does this tool do?

Reverse bytes inside 16-, 32- or 64-bit words while retaining word order, with before/after hex tables.

What input should I provide?

Hexadecimal bytes. The built-in example demonstrates the expected syntax.

What limits should I know?

Combined text limit: 200,000 characters; at most 5,000 result rows. Processing stops after 15 seconds and output is capped at 8 million characters. Result notes describe the algorithm and assumptions.

Can I save or print the result?

Yes. Download TXT, CSV, JSON, or a self-contained printable HTML report. A separate project JSON preserves input and settings for this tool.

Is anything uploaded or saved automatically?

No processing upload or automatic draft saving is performed. Downloads can contain your input or derived data. Site advertising and analytics are covered by the privacy information.