DevToolsmith

ASCII Converter

Convert ASCII text to decimal codes, hex, binary or Base64 and back.

Runs 100% in your browser — nothing is uploaded

Input
Tip: drop a file here5 chars · 5 bytes · 1 line
Result
0 chars · 0 bytes · 0 lines

Up to 200,000 input characters and 2 million output characters. Processing stays on this device.

Use ASCII Converter

Convert ASCII text to decimal codes, hex, binary or Base64 and back. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

ASCII is a 7-bit character set. Every source byte must be 0–127; non-ASCII text is rejected instead of replaced. Use Byte Encoder for UTF-8 and arbitrary bytes.

Example input

Hello

Expected behavior for the example

72 101 108 108 111

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does ASCII Converter handle my input?

ASCII is a 7-bit character set. Every source byte must be 0–127; non-ASCII text is rejected instead of replaced. Use Byte Encoder for UTF-8 and arbitrary bytes.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.