AI FIX Parser

Native desktop app for loading, parsing, and analyzing FIX protocol log files. Built in Rust — parses 1 million FIX messages in under 100 ms.

• Platforms: macOS (aarch64 / x86_64), Windows (x86_64), Linux (x86_64)
• Website: https://aifixparser.com
• Stack: Rust 2021, Dioxus 0.7 (desktop), Rayon, NEON / AVX2 SIMD

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Features

• Load .fix / .log / .txt files or entire folders
• Inspect any message in Table or Raw view, with 150+ FIX tags decoded
• Timeline filter by time range, sender / target, message type, ClOrdID, or field value
• Side-by-side compare two log files with diff coloring on shared ClOrdIDs
• Validate against FIX 4.x rules (missing tags, bad enums, checksum errors)
• Latency analysis — reconstruct full order chains (RFQ → Quote → NOS → Fill), histogram by phase
• Session report — order stats, fill quality scorecard, per-counterparty breakdown
• CSV export from any view
• 100% offline — your FIX logs never leave the machine

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License — Personal-Use Free, Commercial License Required

This software ships under a dual license. See LICENSE for full text.

Use case	License
Individual / personal use	Free (MIT-style)
Academic, educational, research	Free (MIT-style)
Hobby projects, non-commercial evaluation	Free (MIT-style)
Banks, hedge funds, asset managers, prop / HFT firms	Commercial license required
Exchanges, ECNs, ATSs, dark pools, clearing houses	Commercial license required
Prime brokers, custodians, market-data vendors	Commercial license required
Fintech (trading / brokerage / custody / order routing)	Commercial license required
Crypto exchanges, market makers, trading firms	Commercial license required
Any subsidiary, affiliate, contractor, or consultant working for the above	Commercial license required

If you're not sure which track applies to you, ask before deploying — see the LICENSE file for the full list and conditions.

Commercial license inquiries — please email:

📧 andrew.cs328@gmail.com

Subject: AI FIX Parser Commercial License Inquiry

Please include: legal entity name, country of incorporation, brief description of intended use, approximate number of seats, and expected deployment scale.

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Privacy & Network Behavior

AI FIX Parser is 100% offline for your FIX log data — log content, message fields, ClOrdIDs and counterparty IDs never leave your machine.

The app makes exactly two outbound HTTP calls, both anonymous:

Call	Endpoint	Purpose	Data sent
Update check (on startup)	https://aifixparser.com/latest-version	Show "new version available" banner	None — plain GET
Anonymous usage telemetry (Google Analytics 4)	https://www.googletagmanager.com/gtag/js?id=…	Aggregate counters: app starts, file parses, parse times	App version, OS, message count, parse microseconds, delimiter (soh/pipe). No filenames, no message content, no field values, no counterparty IDs.

Opt out of telemetry

Launch the app with the environment variable set:

AIFIXPARSER_NO_TELEMETRY=1 open /Applications/AiFixParser.app

Or add it to your shell profile to make it permanent. When set, the Google Analytics script is never injected and no events fire.

Local storage

The app writes one file on your machine, never sent anywhere:

• ~/.aifixparser/recents.json — last 8 file paths you opened, for the "Recent" list in the welcome screen. Delete the file to clear.

Contributing

By submitting a pull request you agree your contribution is licensed under the same dual-license terms and may be relicensed as part of any future commercial offering. See the Contributions section in LICENSE.