Convert a String to Hex
Quickly convert a string to hexadecimal values. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Convert a String to Hex
- 1. Paste the string. Put any text into the input pane, from a single word to a whole config snippet. Every character is encoded to its byte values in order.
- 2. Choose a Separator. The Separator option sets the text placed between byte values. A space gives the classic hex dump look, an empty separator produces one continuous string for URLs or keys, and '\x' style prefixes suit C literals.
- 3. Copy the encoded bytes. The output shows values like 48 69 for 'Hi'. Copy them into your test data, protocol documentation or wherever raw bytes are expected.
When to use Convert a String to Hex
Convert a String to Hex shows you the exact bytes behind a piece of text. That is useful any time text crosses into a binary context: crafting payloads, writing test fixtures, comparing encodings or checking what a string really contains beyond what fonts render.
- Crafting binary protocol payloads. A device accepts commands as hex byte sequences over serial. Encode the ASCII command string here, then paste the bytes into your terminal program's hex send field.
- Exposing invisible characters. Two strings look identical but compare unequal in code. Hex-encode both and diff the bytes; a stray non-breaking space or zero-width character shows up immediately as an unexpected value.
- Writing byte-level unit tests. Your serializer should emit specific bytes for a given string. Generate the expected hex here and assert against it, so the test fails loudly if the encoding ever drifts.
- Populating SQL and Redis blobs. Some database clients accept binary literals as hex. Encode the string value once and embed it in the INSERT statement or SET command without fighting quoting rules.
Examples
Encode
Input
Hi
Output
48 69
About the Convert a String to Hex tool
Convert a String to Hex is a free online tool that works entirely inside your web browser. Quickly convert a string to hexadecimal values. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 108 Hex utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Convert a String to Hex cost anything?
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?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
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?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
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.