WebSocket Frame Parser

Decode RFC 6455 frames from hex — opcode, mask bit, and payload

Hex dump

Space-separated bytes — masked or unmasked

Build masked text frame

About this tool

Decode RFC 6455 data frames from hex dumps. See FIN/RSV bits, opcode, payload length, masking key, and UTF-8 text payloads. Build a masked client text frame for learning and debugging.

Frequently asked questions

Network Debugging: Redirect Chains, WebSocket Frames, and Postman Collections

Trace HTTP redirects, decode RFC 6455 WebSocket frames from hex, and export Postman v2.1 collections — developer utilities that run in the browser.

References & standards

specRFC 6455 — The WebSocket Protocol

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Hex dump

Frames (1)