Data Toolkit — FastAPI SaaS source code (Python)

Data Toolkit — FastAPI SaaS source code (Python)

Data Toolkit — a ready-made micro-SaaS built on FastAPI for processing CSV and Excel files.
Upload a file → get a clean result, a data report, or a duplicate report.

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WHAT IT CAN DO:
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🧹 DATA CLEANING
• Auto-detection of encoding: UTF-8, cp1251, UTF-16
• Auto-detection of delimiters: , ; tab |
• Header normalization to snake_case
• Removal of spaces, empty rows, empty columns, duplicates
• Number formatting: 1 234,56 → 1234.56
• Date formatting: 01.02.2024 → 2024-02-01
• Codes like 00123 remain as text
• 5 parsing strategies — won´t crash even on corrupted CSVs

🔍 ANALYSIS
• Column report: data types, missing values, statistics
• Top values for text fields
• Duplicate search with grouping
• Preview of the first 10 rows before processing

⚙️ PROCESSING RULES
• Filters: =, ≠, contains, >, <, >=, <=
• Sorting by multiple columns
• Regex replacements with i/m/s flags
• Column concatenation (First Name + Last Name)
• Truncating long values
• Keep / remove columns

💾 EXPORT
• CSV (UTF-8 with BOM — opens correctly in Excel)
• Excel (.xlsx) — bold header, auto-fit width, freeze panes
• HTML reports for data and duplicates

🌍 LANGUAGES
• Russian and English
• Switcher in the header

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TECHNOLOGIES:
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Python 3.11+, FastAPI, uvicorn, pandas, openpyxl, Jinja2.
Pure CSS and JS, no build tools.

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QUICK START (5 MINUTES):
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1. pip install -r requirements.txt
2. uvicorn app.main:app --reload
3. Open http://localhost:8000
4. Done.

No .env files, databases, migrations, or API keys required.

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WHAT´S IN THE ARCHIVE:
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• Full source code (app/, static/)
• requirements.txt
• README.md with complete documentation
• LICENSE
• .gitignore

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LICENSE:
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Commercial use is allowed.
Reselling the source code is prohibited.

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SUPPORT:
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Installation and launch assistance — within 7 days after purchase.

Additional information:

for developers" / "for IT specialists" / "digital product