Convert ASCII to EBCDIC
Map ASCII characters to EBCDIC (code page 037) hex bytes. 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 EBCDIC
- 1. Paste the ASCII source text. Enter the text destined for a mainframe context in the input pane. Each character is translated through the code page 037 table, IBM's standard EBCDIC mapping for US English.
- 2. Choose the byte separator. The Separator option formats the hex output. Spaces between bytes match how mainframe dumps are usually printed, making side-by-side comparison with a SYSOUT listing painless.
- 3. Note how the mapping differs. EBCDIC bears no resemblance to ASCII ordering: A becomes hex C1, lowercase letters sit in three discontinuous blocks, and digits live at F0 through F9. Seeing real values beats memorizing the table.
- 4. Copy the EBCDIC bytes. Copy the hex sequence for your conversion tests, file-transfer checks or documentation. The EBCDIC decoder on this site brings the bytes back to readable ASCII.
When to use Convert ASCII to EBCDIC
Convert ASCII to EBCDIC shows how text is encoded on IBM mainframes using code page 037. Despite decades of predictions, z/OS systems still process enormous volumes of business data in EBCDIC, and anyone integrating with them eventually needs to know what their strings look like as CP037 bytes.
- Verifying mainframe file transfers. A file sent to z/OS arrives garbled and you suspect a missing codepage conversion. Encoding the expected text here gives the byte values a correct transfer should contain, settling the argument.
- Building COBOL integration tests. A modernization project reads EBCDIC records from a mainframe extract. Generate known CP037 byte sequences to feed your Java or Python decoder and prove the translation table is right.
- Reading hex dumps from z/OS. A mainframe abend dump prints storage in hex. Converting candidate strings to EBCDIC lets you scan the dump for the bytes that spell your field names or literals.
- Teaching encoding history. EBCDIC's punched-card lineage explains its odd non-contiguous letter blocks. Concrete conversions like A to C1 give a lecture or blog post on encoding evolution real substance.
Examples
Letter
Input
A
Output
C1
Word
Input
Hi
Output
C8 89
About the Convert ASCII to EBCDIC tool
Convert ASCII to EBCDIC runs as plain JavaScript in your browser tab, with no server behind it. Map ASCII characters to EBCDIC (code page 037) hex bytes. 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. 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
Is Convert ASCII to EBCDIC 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.