Invert a Hex Number
Find bitwise inverse of a hexadecimal value (inverted within its own bit-width). Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Invert a Hex Number
- 1. Enter a hex value. Paste the number to invert into the input pane. Its length sets the bit-width, so a single digit inverts within 4 bits while an 8-digit value inverts within 32 bits.
- 2. Understand the inversion. With no options to set, every bit simply flips: a, which is 1010, becomes 5, which is 0101. Because the width comes from the input, you never get an avalanche of leading f digits.
- 3. Copy the complement. The bitwise inverse appears in the output pane. Copy it for use as a mask, a ones' complement intermediate, or a check against what your code computed.
When to use Invert a Hex Number
Invert a Hex Number flips every bit of a value within its own width, giving the ones' complement without manual binary conversion. It is the tool for deriving clear-masks from set-masks, checking complement arithmetic and reasoning about bitfield logic when all you have in front of you is hex.
- Deriving a clear mask from a set mask. Your driver defines ENABLE_MASK as 0x0000ff00 and you need the AND mask that clears those bits. Inverting yields ffff00ff, ready to paste next to the original define.
- Verifying ones' complement checksums. Internet checksum algorithms end by inverting a 16-bit accumulator. Paste the accumulator value from your packet capture, invert it, and compare against the checksum field on the wire.
- Debugging unexpected mask behavior. A register readback shows bits set that your code supposedly cleared. Inverting the mask constant reveals exactly which positions the clear operation touched and which it silently left alone.
- Preparing exam or interview examples. When writing exercises about complements and signed representations, this gives you correct NOT results at any width for the answer sheet without drawing out the binary each time.
Examples
Invert a nibble
Input
a
Output
5
Invert a byte
Input
ff
Output
0
About the Invert a Hex Number tool
Invert a Hex Number does its work locally, right in the browser. Find bitwise inverse of a hexadecimal value (inverted within its own bit-width). There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Hex Tools collection on EditSafely, a set of 108 small, focused Hex utilities that share the same instant, private workspace.
There is nothing to configure. Provide the input and the result appears on its own. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is Invert a Hex Number free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.
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