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GitHub Username Validator

Validate, detect duplicates, and identify invalid GitHub accounts in bulk. Built with Next.js 15, Tailwind CSS, and the GitHub API.

Features

File Support

  • CSV — auto delimiter detection and column selection
  • Excel — .xlsx / .xls with header detection
  • Word — basic .docx processing
  • Text — one username per line
  • Manual input — paste directly into the UI

Username Extraction

  • Handles GitHub URLs (https://github.com/username), @username, username#fragment, and mixed formats in a single file
  • Auto-detects the GitHub username column in structured files

Validation Engine

  • GraphQL batch (with PAT): 200 users per request, real progress tracking
  • REST parallel (no token): 50 users per batch with concurrency control
  • Up to 5,000 usernames per session
  • Pause / Resume / Cancel with real-time ETA
  • Automatic retry with exponential backoff on rate limits

Authentication

  • With PAT: 5,000 req/hr, GraphQL batch processing
  • Without PAT: 60 req/hr, REST sequential
  • Token stays in browser memory only — never stored or sent to any server

Repository Engagement Analysis

  • Stars check: GraphQL per-user batch (8 users/query) or REST repo stargazer scan with early termination
  • Fork check: GraphQL batch queries {user}/{repo} (15 users/query) or REST per-user — always O(users) calls
  • Check modes: Stars only, Forks only, or Both
  • Retry with backoff on 502/503 errors

Filtering & Search

  • Status: All, Valid, Fake (invalid + deleted + duplicate), Invalid, Deleted, Duplicate, Pending, Error
  • Engagement: Starred, Forked, Any Engagement, No Engagement
  • Account age: 2+ months, 3+ months, 6+ months, 1+ year
  • Full-text search across usernames, profile names, and original values
  • Multi-column sorting

Export

  • CSV export with selectable columns
  • Exports respect all active filters
  • Includes engagement data, account age, and profile info

Statistics

  • Total, Valid, Invalid, Deleted, Duplicates, Fake, Pending, Errors
  • Repository Starred / Forked counts (when repo URL is provided)

Privacy

  • All processing happens client-side
  • GitHub PAT tokens stay in browser session memory
  • No analytics, no tracking, no data storage

Meet the Author

Author

Contact

 

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