Convert ASCII to Hexadecimal
Convert ASCII characters to hexadecimal numbers. 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 Convert ASCII to Hexadecimal
- 1. Type or paste your text. Enter ASCII text in the input pane and each character's hex code appears on the right, so Hi renders as 48 69. Conversion is live as you edit.
- 2. Format with the separator. The Separator option joins the hex pairs. Spaces mimic hex-dump style, an empty separator yields a compact string like 4869, and a comma with 0x prefixes in mind suits code snippets.
- 3. Recognize common hex patterns. Hex makes ASCII structure visible at a glance: 41 through 5A are uppercase, 61 through 7A are lowercase, 30 through 39 are digits, and 20 is a space. Values from 80 upward signal non-ASCII bytes.
- 4. Copy the hex output. Copy the encoded values into your debugger watch, protocol spec or escape sequences. Reverse the trip anytime with the hexadecimal-to-ASCII decoder.
When to use Convert ASCII to Hexadecimal
Convert ASCII to Hexadecimal expresses characters in the base programmers actually use day to day. Hex dumps, escape sequences, memory views and packet captures all speak base 16, so translating a known string into hex is often the first step of comparing what you expected against what a tool displayed.
- Matching bytes in Wireshark captures. You need to find where your payload appears in a packet capture. Encode the marker string to hex and search the capture's byte view for that exact sequence.
- Writing escape sequences in source code. Embedding a delimiter as \x1e in a string literal requires its hex value. Convert the character here and copy the code straight into your Python or C escape.
- Reading hexdump output faster. When xxd shows unfamiliar bytes, encoding your candidate strings tells you what to scan for. Spotting 48 69 in the dump confirms where the greeting text landed in the file.
- Documenting binary file formats. A file-format spec should quote magic strings in hex. Generating the values from the actual text avoids the transcription errors that plague hand-written format documentation.
Examples
Encode
Input
Hi
Output
48 69
About the Convert ASCII to Hexadecimal tool
Convert ASCII to Hexadecimal runs as plain JavaScript in your browser tab, with no server behind it. Convert ASCII characters to hexadecimal numbers. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's ASCII Tools section, 81 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
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.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Convert ASCII to Hexadecimal 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.