Game Localization QA Preflight

Catch mechanical localization mistakes before release.

Game Localization QA Preflight is a fully local QA tool for indie game localization files. Load your CSV or JSON data, compare the source language with one or more target languages, and find common release-blocking mistakes without uploading your files anywhere.

Who this is for

Indie game developers and localization teams who want a deterministic mechanical QA pass before shipping localized builds.

CHECKS

• Missing keys
• Blank translations
• Extra keys
• Duplicate keys
• Likely untranslated / source-equal strings
• Placeholder mismatches: {name}, {0}, {{name}}, ${name}, printf placeholders, etc.
• HTML / XML / Unity-style tag mismatches
• Numeric mismatches
• URL mismatches
• Newline mismatches
• Excessive text expansion
• Optional maximum character length
• Suspicious control / invisible characters
• Completion rate per target locale

SUPPORTED INPUT

Wide CSV:
One key column, one source-language column, and one or more target-language columns.

Separate locale files:
One source file plus one or more target CSV or JSON files.

JSON supports flat string/null objects and array-of-record structures with configurable key/text properties.

FULLY LOCAL

Files are analyzed only inside your browser.

• No server
• No account
• No login
• No API key
• No telemetry
• No cloud storage
• No network connection required

Your source files are read-only and are never modified.

EXPORTS

• QA Issues CSV
• Summary CSV
• JSON Report

HOW TO USE

1. Download and extract the ZIP.
2. Open Game_Localization_QA_Preflight.html directly in desktop Google Chrome.
3. Choose Wide CSV or Separate locale files.
4. Select and map your localization data.
5. Click Analyze.
6. Review Errors and Warnings.
7. Export a report if needed.

V1 LIMITATIONS

This tool does not translate text and does not use AI.

It does not judge semantic translation quality, enforce glossaries, perform spell/grammar checking, or directly parse Unity/Unreal/RPG Maker projects.

PO, POT, XLIFF and TMX are not supported in V1.

Flat-object JSON duplicate properties cannot always be detected after normal JSON parsing.

Recommended environment:
Current desktop Google Chrome.