Hex encoder tools convert text into hexadecimal bytes so you can debug byte-level representations, generate fixtures, or match how systems log binary data. SWEDevTools: Prism encodes UTF-8 text to hex locally in your browser (no server), with options for separators (none, space, colon, or 0x prefixes) and uppercase output. Paste your string, choose the formatting style your target system expects, and click Run to produce deterministic hex output. Because SWEDevTools: Prism is local-first, works offline as an installable PWA, and supports pipelines, you can immediately chain hex output into decoders, validators, or additional encoders without exposing data to third-party websites. This is useful when you need byte-perfect values for test vectors and documentation.
Representing bytes as readable text for logs, debugging, and storage formats.
Yes—input is encoded as UTF-8 bytes, so some characters produce multiple bytes.
Use none for compact output, space/colon for readability, 0x when matching certain dumps.
No—hex is reversible encoding.
Usually due to UTF-8 vs UTF-16 encoding or formatting differences.
Yes—use Hex Decode.
No—everything runs locally.
Yes—install the PWA.
smalldev.tools is no longer available. Prism by SWEDevTools offers the same developer tools and more, with offline support, pipeline chaining, and completely free usage — no signup required.