RAS Log Decoder

// TOOLS / LOG-DECODER

Reading a raw Parallels RAS log is tedious. The format mixes hexadecimal module codes, thread and process identifiers, timestamps, and messages that can span tens of thousands of lines. The RAS Log Decoder parses all of it instantly — without sending any data to a server.

→ Open the RAS Log Decoder

What the tool decodes

Every Parallels RAS log line follows a structured format that the official documentation does not fully detail. The decoder extracts all fields:

Level (E / W / I / D / T) — Error, Warning, Info, Debug, Trace — color-coded at a glance
Module hex code — the hexadecimal component identifier, translated into a readable name from 107 referenced modules
Component name — PUBAGENT, HTML5GW, PA_SAML, ENROLLSERVER, HALBAGENT, SCARDHOOKER…
Date and time in separate columns for faster reading
Session ID (S/) and Correlation ID (C/) when present — essential for tracking a user session across log files

Supported formats

The decoder handles all three log formats produced by Parallels RAS:

Standard format — controller.log, gateway.log, redundancy.log, EnrollServer.log, tsagent.log, vdiagent.log and all classic UTF-16LE logs
HTML5GW format — HTML5GW.log, with its specific date format and decimal module codes
MSI/Windows format — RASMsi.log, which mixes standard RAS lines with native Windows MSI traces

100% local processing

Your logs contain Active Directory usernames, internal IP addresses, machine names and sometimes authentication information. None of this data leaves your browser: decoding runs entirely in client-side JavaScript. The RASInsider server receives nothing.

How to use it

Open your log file in any text editor (Notepad++, VS Code…)
Copy the lines you are interested in — a few dozen or several thousand, it doesn’t matter
Paste into the decoder’s text area
Click Decode
Filter by level (E/W/I/D/T) and by module to quickly isolate what is causing the issue
Use Last ⇥ to jump directly to the end of the log — that is usually where the error is

RAS logs are UTF-16LE on Windows. Copy them from your usual text editor, the decoder handles encoding automatically.

→ Open the RAS Log Decoder

Want to see RASInsider first in Google’s Top Stories?