FIX Inspector

Offline FIX message viewer and decoder for troubleshooting trade logs. Supports quickfix XML dictionaries.

Install

FIX Inspector requires Python 3.12+.

python -m pip install fixinspector

For local development:

python -m pip install -e .

Run

Launch the GUI:

python -m fixinspector
fixinspector

Use the CLI:

fixinspect decode sample.log --format text
fixinspect decode sample.log --format json
fixinspect index sample.log

The same CLI commands are available through the package module:

python -m fixinspector decode sample.log --format json
python -m fixinspector index sample.log

Pass --dict <path> to use a QuickFIX-style XML dictionary.

Development

pytest -q

With uv:

uv sync --all-groups
uv run --no-sync pytest -q
uv run python -m fixinspector