DevToolsmith

Byte Encoder

Transcode bytes between UTF-8, ASCII, hex, binary, Base64 and decimal notation.

Runs 100% in your browser — nothing is uploaded

Input
Tip: drop a file here8 chars · 12 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 Byte Encoder

Transcode bytes between UTF-8, ASCII, hex, binary, Base64 and decimal notation. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

Numeric encodings represent bytes, not Unicode code points. UTF-8 decoding is strict and rejects malformed sequences. Decimal byte values must be between 0 and 255. A leading UTF-8 BOM is preserved as text.

Example input

Hello 你好

Expected behavior for the example

48 65 6c 6c 6f 20 e4 bd a0 e5 a5 bd

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 Byte Encoder handle my input?

Numeric encodings represent bytes, not Unicode code points. UTF-8 decoding is strict and rejects malformed sequences. Decimal byte values must be between 0 and 255. A leading UTF-8 BOM is preserved as text.

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.