> 🌐 **Language:** English · [Español](README.es.md)

# DataTools

Local CSV / Excel cleaning. CLI + browser GUI, no cloud, no install ceremony. GUI ships with English and Spanish language packs.

## Tools

| # | Tool | Status |
|---|------|--------|
| 01 | **Find Duplicates** — exact + fuzzy match, 5 normalizers, survivor rules, audit | Ready |
| 02 | **Clean Text** — whitespace, smart chars, BOM, line endings, case ops | Ready |
| 03 | **Standardize Formats** — dates, phones, emails, addresses, names, currencies, booleans | Ready |
| 04 | **Fix Missing Values** — disguised-null detection, profile, mean/median/mode/ffill/bfill/interpolate, drop strategies | Ready |
| 05 | **Map Columns** — fuzzy auto-rename, target schema with type coercion, required fields with defaults, drop/reorder | Ready |
| 06 | Find Unusual Values | Coming Soon |
| 07 | Combine Files | Coming Soon |
| 08 | Quality Check | Coming Soon |
| 09 | **Automated Workflows** — chain tools with recommended (not forced) order, save/load JSON, automate weekly cleanups | Ready |

Every tool page has an in-tool **Help** popover (right of the title) with a compact When-to-use / Steps / Examples / Tip card. Copy lives in the language packs (`tools.<id>.help_md`).

## Download (non-technical users)

Pre-built bundles — no Python install, no admin rights, no internet at runtime. Each release ships an **installer** per OS that wires up Desktop + Start Menu / Launchpad shortcuts.

| Platform | Installer |
|---|---|
| **macOS** | `DataTools-X.Y.Z-mac.dmg` — open, drag DataTools.app into /Applications, launch from Launchpad. |
| **Windows** | `DataTools-X.Y.Z-win-setup.exe` — run installer (per-user, no admin). Desktop shortcut + Start Menu entry created. |
| **Linux** | `DataTools-X.Y.Z-linux-x86_64.AppImage` — `chmod +x`, double-click. The AppImage is already portable. |

Latest release: see [GitHub Releases](https://git.invixiom.com/giteadmin/datatools-dev/releases) (or the Gumroad listing). Each bundle is ~300 MB unpacked; on first launch the app starts a local server at http://127.0.0.1:8501 and opens your default browser. Nothing leaves your machine.

**Tesseract OCR is bundled.** Scanned-PDF support in the PDF Extractor works out of the box on all three platforms — no separate Tesseract install required. License attribution: see [`LICENSE_TESSERACT.txt`](LICENSE_TESSERACT.txt).

**First-launch warnings (one-time):**
- **macOS** unsigned builds: right-click → **Open** → confirm. (Signed builds skip this.)
- **Windows** SmartScreen: click **More info** → **Run anyway**.

Detailed install + troubleshooting walkthrough: [User Guide §1](docs/USER-GUIDE.md#1-install).

## Install from source (developers)

```bash
pip install -r requirements.txt
```

Python 3.10+ required.

## Run

**GUI** (recommended):
```bash
streamlit run src/gui/app.py
```

**CLI** — seven entry points:
```bash
python -m src.cli            customers.csv [--apply]   # dedup
python -m src.cli_text_clean messy.csv     [--apply]   # text clean
python -m src.cli_format     intl.csv      [--apply]   # format standardize (auto-streams >100 MB)
python -m src.cli_missing    holes.csv     [--apply]   # missing values
python -m src.cli_column_map vendor.csv    [--apply]   # column mapper
python -m src.cli_pipeline   any_file.csv  [--apply]   # chain tools end-to-end
python -m src.cli_analyze    any_file.csv  [--json]    # scan only
```

Every CLI runs preview-only by default; add `--apply` to write output.

## Language

The GUI sidebar has a language picker. Packs ship for **English** and **Español** (`src/i18n/packs/`); the choice persists for the session. Adding a language: drop a `<code>.json` next to `en.json` mirroring its key tree, then list it in `LANGUAGES`. See [Developer Guide §i18n](docs/DEVELOPER.md#i18n--language-packs).

## Review & Normalize gate

Every uploaded file passes through a CSV-normalization gate before any tool sees it. The analyzer flags ~15 issue types (whitespace, NBSP / zero-width chars, BOM, encoding, smart punct, dirty headers, null sentinels, mojibake, …) tagged by **confidence** (high / medium / low) and **fix action**. The GUI shows each finding with Auto-fix / Skip / Customize, a live before/after preview, and an encoding-override picker. Tool pages refuse to load until the gate passes.

## Output

Every run writes:

- `{input}_<tool>.csv` — the cleaned data
- `{input}_changes.csv` (text cleaner) or `{input}_match_groups.csv` (dedup) — audit trail
- `logs/<tool>_YYYYMMDD_HHMMSS.log` — debug-level run log

Original input file is never modified.

## Docs

- [User Guide](docs/USER-GUIDE.md) — install, GUI workflow, gate
- [CLI Reference](docs/CLI-REFERENCE.md) — every flag with recipes
- [Requirements](docs/REQUIREMENTS.md) — file sizes, encodings, detectors, perf targets
- [Technical](docs/TECHNICAL.md) — architecture, gate internals, fix registry
- [Developer Guide](docs/DEVELOPER.md) — adding fixes / detectors / standardizers

## Dependencies

`pandas`, `openpyxl`, `rapidfuzz`, `phonenumbers`, `typer`, `loguru`, `charset-normalizer`, `streamlit`. Optional: `ftfy` for mojibake repair.

## License

Proprietary.