Custom-pad a Number
Add a padding of custom symbols to a number. 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 Custom-pad a Number
- 1. Paste your number. Enter the number you want padded, for example 42, into the input pane.
- 2. Set Target length, Padding symbols and Pad on. Choose the final width under Target length, pick the Padding symbols to insert, such as stars or zeros, and select Left or Right under Pad on to place the padding.
- 3. Copy the padded number. Copy the fixed-width result, such as eight stars followed by 42, from the output pane into a report, invoice or fixed-column data file.
When to use Custom-pad a Number
Custom-pad a Number fills a number out to a fixed width using any characters you choose, not just the usual zero. It's built for anywhere a number needs to line up in a column or reach a specific length using a particular symbol.
- Formatting invoice or ticket numbers with a brand symbol. A ticketing system wants invoice numbers padded with asterisks or dashes instead of zeros so they stand out visually in printed receipts.
- Aligning numbers in a fixed-width text report. A legacy report format expects every numeric field to be exactly ten characters wide, padded on the left with spaces or dots to keep columns aligned.
- Building a custom serial number scheme. A product's serial numbers need consistent length padded with a specific filler character on the right, distinguishing them visually from plain sequential IDs.
- Matching an unusual data import specification. A partner's file format requires numeric fields padded with a non-zero character to a fixed length before the import will accept the file.
Examples
Pad to ten characters with stars
Input
42
Output
********42
Pad on the right
Input
42
Output
42********
About the Custom-pad a Number tool
Custom-pad a Number runs as plain JavaScript in your browser tab, with no server behind it. Add a padding of custom symbols to a number. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Number Tools section, 194 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 3 settings, including Target length, Padding symbols and Pad on, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
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 Custom-pad a Number 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.