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GMClean
What it is
GMClean is a free, self-hosted web tool for reviewing inboxes, classifying email, unsubscribing, deleting messages, and exporting data. It scans message headers such as sender, subject, and List-Unsubscribe information without downloading email bodies. The tool supports up to 10 Gmail, Outlook, or custom IMAP mailboxes at once and can scan INBOX, Spam, Promotions, Trash, and other IMAP folders. Analysis includes a 0–100 inbox health score based on five weighted factors, sender insights, and email age distribution. Classification uses heuristic rules, with optional Gemini assistance for ambiguous cases. Users can unsubscribe in one click or in bulk; bulk deletion is processed in batches of 500 messages. Exports include selected subscriptions with resubscribe links and scanned emails in CSV format. GMClean stores data in browser IndexedDB, and the project says it has no cloud database or telemetry. Credentials are encrypted before storage, and setup requires an ENCRYPTION_SECRET described as an AES-256 key. The project documents deployment with npm, Docker, or Docker Compose. Its MIT-licensed plan is free.
For and against
For
- Connects up to 10 mailboxes simultaneously
- Scans headers without downloading email bodies
- Includes inbox scoring and sender insights
- Supports bulk unsubscribe and CSV exports
- MIT-licensed and self-hosted
Against
- Bulk deletion is batched at 500 messages
- Optional Gemini classification is limited to ambiguous cases
- Setup requires an ENCRYPTION_SECRET
The verdict
GMClean combines inbox analysis with unsubscribe, deletion, and export tools while keeping its storage in browser IndexedDB, according to the project. Users should account for its self-hosted setup and 500-message deletion batches.
Who it suits
GMClean suits people who want to inspect and manage several Gmail, Outlook, or IMAP inboxes through a self-hosted web tool. Its header-only scanning and export options may fit users seeking inbox analysis without fetching message bodies.
Plans and prices
Open source
MIT licensed · self-hosted
Read 11 Oct 2026 · github.com
On the record
- Account limit
- The README says users can connect up to 10 mailboxes simultaneously.github.com · read 11 Oct 2026
- AI integration
- Optional Gemini-powered classification is available for ambiguous cases.github.com · read 11 Oct 2026
- Authentication
- It supports app passwords and OAuth2 for Google and Microsoft.github.com · read 11 Oct 2026
- Bulk delete limit
- Bulk email deletion is batched at 500 messages per batch.github.com · read 11 Oct 2026
- Classification
- Email classification uses heuristic rules and can optionally use Gemini for ambiguous cases.github.com · read 4 Oct 2026
- Credential security
- The README says credentials are encrypted with AES-256-CBC before storage and requires an ENCRYPTION_SECRET.github.com · read 11 Oct 2026
- Deployment
- The README provides npm development, Docker, and Docker Compose setup instructions.github.com · read 11 Oct 2026
- Email providers
- It supports Gmail, Outlook, and custom IMAP mailboxes.github.com · read 11 Oct 2026
- Email providers and authentication
- The README lists Gmail, Outlook, and custom IMAP support, with app passwords or OAuth2 for Google and Microsoft.github.com · read 4 Oct 2026
- Exports
- It can export selected subscriptions and scanned emails to CSV.github.com · read 11 Oct 2026
- Folder scanning
- It can scan INBOX, Spam, Promotions, Trash, and other IMAP folders.github.com · read 11 Oct 2026
- Header-only scanning
- GMClean says it fetches email headers such as subject, sender, and List-Unsubscribe, and does not download email bodies.github.com · read 4 Oct 2026
- Inbox analysis
- It provides a 0–100 inbox health score based on five weighted factors, plus sender insights and email age distribution.github.com · read 4 Oct 2026
- Inbox insights
- It provides a 0–100 inbox health score, sender insights, email age distribution, and inbox analytics.github.com · read 11 Oct 2026
- License
- The repository says GMClean is licensed under the MIT License.github.com · read 11 Oct 2026
- License and support
- The repository is MIT-licensed and invites contributions through GitHub pull requests.github.com · read 4 Oct 2026
- Local data
- The README says app data is stored in browser IndexedDB and the app has no cloud database or telemetry.github.com · read 11 Oct 2026
- Local storage
- GMClean says data is stored in browser IndexedDB and that it has no cloud database, telemetry, tracking cookies, or analytics scripts.github.com · read 4 Oct 2026
