Convert ASCII to Decimal
Convert ASCII characters to decimal 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 Decimal
- 1. Enter the characters to convert. Paste or type text into the input pane. Each character is looked up in the ASCII table and its decimal code appears in the output, so Hi immediately shows 72 105.
- 2. Adjust the separator. The Separator option sets the string placed between codes. Spaces suit quick reading, commas suit array literals, and a newline per code lines the values up for a spreadsheet column.
- 3. Learn the code landmarks. A few anchors make the output easy to scan: space is 32, digits run 48 to 57, uppercase letters start at 65 and lowercase at 97. Anything below 32 is a control character.
- 4. Copy the decimal codes. Copy the number list wherever character codes are needed, from charCodeAt comparisons in JavaScript to keyboard-event debugging. The decimal-to-ASCII tool turns them back into text.
When to use Convert ASCII to Decimal
Convert ASCII to Decimal maps every character to its numeric code, the same values charCodeAt and ord return in code. Decimal is the form most tutorials, keyboard APIs and legacy docs use, so having the codes for an exact string on screen removes guesswork from a whole category of programming tasks.
- Debugging string comparisons in JavaScript. Two strings look identical but compare unequal. Converting both to decimal codes exposes the difference, often a non-breaking space with code 160 hiding where a regular 32 should be.
- Writing character-range logic. A validator needs to accept codes 48 through 57 for digits. Confirming the exact boundary values here prevents the classic off-by-one that lets a slash or colon sneak through.
- Preparing data for ord and chr exercises. Python and C teaching materials lean on decimal character codes. Generate accurate code lists for your example strings instead of copying possibly stale numbers from an old handout.
- Reading legacy protocol documentation. Older specs describe delimiters as decimal values like 2 and 3 for STX and ETX. Converting your captured data to decimal lets you match it against the spec line by line.
Examples
Encode
Input
Hi
Output
72 105
About the Convert ASCII to Decimal tool
Convert ASCII to Decimal is a free online tool that works entirely inside your web browser. Convert ASCII characters to decimal numbers. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 81 ASCII 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 ASCII to Decimal 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.