https://mboxviewer.net/

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    "title": "Mbox Viewer — Read MBOX Files on macOS",
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  "markdown": "![Mbox Viewer](https://mboxviewer.net/icon-256.png)\n\n## The fastest way to read MBOX files on your Mac\n\nBack up your Gmail with Google Takeout and read it offline on your Mac. Open, search, and export emails from MBOX and EML archives of any size.\n\nWe only store your email. No spam, ever.\n\nmacOS 14+ Universal Binary Apple Silicon native\n\n![Mbox Viewer — three-column layout with message list, Gmail labels, and text view.](https://mboxviewer.net/screenshot-mbox-viewer.png)\n\nMbox Viewer — three-column layout with message list, Gmail labels, and text view.\n\n### Your Gmail, offline on your Mac\n\nUse Google Takeout to back up your entire Gmail account. Mbox Viewer lets you read, search, and browse those backups offline — no internet required.\n\n### Other tools choke on large files\n\nMost MBOX readers crash or freeze on files over a few hundred MB. Many use Electron or Java.\n\n### Built specifically for this\n\nMbox Viewer streams through files of any size without loading them into memory. Native macOS, instant search, full export.\n\n## Features\n\n### Handles any size\n\nStreaming parser with 1 MB buffer. Opens files from a few KB to 50+ GB without loading the entire file into memory.\n\n### Instant re-opens\n\nBinary index with SHA-256 validation. First open indexes the file; subsequent opens take under 1 second for any size.\n\n### Powerful search\n\nFull syntax: from:, to:, subject:, body:, date:, has:attachment, label:, size:>, OR, negation, exact phrase.\n\n### Gmail labels\n\nAutomatically reads Gmail labels from Google Takeout. Browse by label in the sidebar with message counts.\n\n### Full export\n\nExport to EML, CSV, plain text, or extract all attachments. Merge multiple MBOX files with deduplication.\n\n### Conversation threads\n\nJWZ threading algorithm groups messages into conversations with visual reply chains up to 4 levels deep.\n\n### Native macOS\n\nSwiftUI + AppKit. Dark mode, Drag & Drop, Quick Look, Share, Print. No Electron, no Java, no web wrapper.\n\n### Privacy first\n\nEverything runs locally on your Mac. No cloud, no telemetry, no data leaves your machine. Ever.\n\n### Export labels to MBOX\n\nExport any Gmail label as a standalone MBOX file. Create smaller, focused archives from your full Gmail backup.\n\n### Print & Share\n\nPrint messages with formatted headers. Share via Mail, AirDrop, Notes, and other macOS share services.\n\n### Attachments\n\nView attachments inline, preview with Quick Look (Spacebar), save individually or in bulk, drag directly to Finder.\n\n### Drag & Drop\n\nDrop MBOX or EML files onto the app to open them. Drag messages out as .eml files or drag attachments to Finder.\n\n## Performance\n\nOpens a 50 GB MBOX file in under 5 minutes. Re-opens it in under 1 second.\n\n| File Size | Messages | First Open | Re-open | RAM Usage |\n| --- | --- | --- | --- | --- |\n| 500 MB | ~5,000 | < 5 sec | < 1 sec | < 100 MB |\n| 5 GB | ~50,000 | < 30 sec | < 1 sec | < 200 MB |\n| 50 GB | ~500,000 | < 5 min | < 1 sec | < 600 MB |\n\nRe-open is always under 1 second regardless of file size, thanks to the binary index.\n\n## Pricing\n\n### Free\n\n€0 forever\n\n-   Up to 500 MB\n-   All features included\n\nComing Soon\n\n### Annual\n\n€11.95 /year\n\n-   Unlimited file sizes\n-   3 device activations\n\nComing Soon\n\nBest value\n\n### Lifetime\n\n€109.90 \\-50%\n\n€54.95 one-time\n\n-   Unlimited file sizes\n-   3 device activations\n\nComing Soon\n\nComing soon on\n\nMac App Store\n\nAll purchases include a license key for 3 devices.\n\nPayments processed securely by Lemon Squeezy (a Stripe company). VAT included.\n\nNeed more licenses or activations? [Contact us](https://colorvivo.com/contacto/).\n\n## Get Early Access\n\nBe the first to know when Mbox Viewer is ready. Subscribe to receive early access to the first version.\n\nWe only store your email. No spam, ever.\n\n**Search SyntaxPowerful search with full query syntax. Use the search bar or the visual filter sheet (Cmd+Shift+F).Show full search syntax reference Hide search syntax**\n\n## Search Syntax\n\nPowerful search with full query syntax. Use the search bar or the visual filter sheet (Cmd+Shift+F).\n\nShow full search syntax reference Hide search syntax\n\n| Prefix | Example | Description |\n| --- | --- | --- |\n| from: | from:[\\[email protected\\]](https://mboxviewer.net/cdn-cgi/l/email-protection) | Messages from this sender |\n| to: | to:team@ | Messages sent to this address |\n| cc: | cc:manager | Messages CC'd to this person |\n| subject: | subject:\"quarterly report\" | Subject contains phrase |\n| body: | body:invoice | Full-text body search (press Enter) |\n| has:attachment | has:attachment | Messages with attachments |\n| has:no-attachment | has:no-attachment | Messages without attachments |\n| label: | label:Important | Gmail label |\n| filename: | filename:report.pdf | Attachment filename |\n| date: | date:2024-03 | Messages from March 2024 |\n| before: | before:2024-01-01 | Messages before date |\n| after: | after:2023-06-15 | Messages after date |\n| size:> | size:>5mb | Messages larger than 5 MB |\n| size:< | size:<100kb | Messages smaller than 100 KB |\n| \\- | \\-spam | Exclude term |\n| \"...\" | \"exact phrase\" | Exact phrase match |\n| OR | from:alice OR from:bob | Either condition |\n| (implicit) | invoice 2024 | Both terms (AND) |\n\n## Frequently Asked Questions\n\n**What is an MBOX file?**\n\nMBOX is a standard format for storing email messages. Gmail's Google Takeout exports your emails as MBOX files. Many email clients and servers use this format for backups and archives.\n\n**How do I back up my Gmail as MBOX?**\n\n1\\. Go to [takeout.google.com](https://takeout.google.com/) and sign in with your Google account. 2. Click \"Deselect all\", then scroll down and check only \"Mail\". 3. Click \"All Mail data included\" to choose specific labels, or leave it to export everything. 4. Click \"Next step\", choose your export format (e.g. .zip), file size, and delivery method. 5. Click \"Create export\" — Google will prepare your archive (this can take hours or days for large accounts). 6. Download the .zip file when ready, extract it, and open the .mbox file with Mbox Viewer. Once exported, you have a full offline backup of your Gmail that you can read anytime without internet.\n\n**Can it open very large files?**\n\nYes. Mbox Viewer uses a streaming parser that never loads the entire file into memory. It can open files of 50 GB and beyond. The first open indexes the file (takes a few minutes for very large files), and all subsequent opens are instant (under 1 second).\n\n**Does it modify my MBOX file?**\n\nNever. Mbox Viewer is strictly read-only. It creates a small index file alongside your MBOX for fast access, but never writes to the original file.\n\n**What's the difference between Free and Pro?**\n\nFree includes all features but is limited to MBOX files up to 500 MB. Pro removes the file size limit. There's no feature gating — search, export, labels, threading all work in both versions.\n\n**Can I use my license on multiple Macs?**\n\nYes. Each license allows activation on up to 3 devices. You can deactivate a device from within the app to free up a slot.\n\n**Does it support HTML emails?**\n\nYes. Mbox Viewer renders HTML emails with their original formatting. Remote images are blocked by default for privacy, with an option to load them.\n\n**What macOS versions are supported?**\n\nmacOS 14 Sonoma and later. Universal Binary — runs natively on Apple Silicon (M1/M2/M3/M4) and Intel Macs.\n",
  "fullPageMarkdown": "Mbox Viewer — Read MBOX Files on macOS\n\n![Mbox Viewer](https://mboxviewer.net/icon-256.png)# The fastest way to read MBOX files on your Mac\n\nBack up your Gmail with Google Takeout and read it offline on your Mac. Open, search, and export emails from MBOX and EML archives of any size.\n\n Notify Me\n\n I accept the [Privacy Policy](https://mboxviewer.net/privacy/)\n\nWe only store your email. No spam, ever.\n\nmacOS 14+ Universal Binary Apple Silicon native\n\n![Mbox Viewer — three-column layout with message list, Gmail labels, and text view.](https://mboxviewer.net/screenshot-mbox-viewer.png)\n\nMbox Viewer — three-column layout with message list, Gmail labels, and text view.\n\n## Why Mbox Viewer?\n\n### Your Gmail, offline on your Mac\n\nUse Google Takeout to back up your entire Gmail account. Mbox Viewer lets you read, search, and browse those backups offline — no internet required.\n\n### Other tools choke on large files\n\nMost MBOX readers crash or freeze on files over a few hundred MB. Many use Electron or Java.\n\n### Built specifically for this\n\nMbox Viewer streams through files of any size without loading them into memory. Native macOS, instant search, full export.\n\n## Features\n\n### Handles any size\n\nStreaming parser with 1 MB buffer. Opens files from a few KB to 50+ GB without loading the entire file into memory.\n\n### Instant re-opens\n\nBinary index with SHA-256 validation. First open indexes the file; subsequent opens take under 1 second for any size.\n\n### Powerful search\n\nFull syntax: from:, to:, subject:, body:, date:, has:attachment, label:, size:>, OR, negation, exact phrase.\n\n### Gmail labels\n\nAutomatically reads Gmail labels from Google Takeout. Browse by label in the sidebar with message counts.\n\n### Full export\n\nExport to EML, CSV, plain text, or extract all attachments. Merge multiple MBOX files with deduplication.\n\n### Conversation threads\n\nJWZ threading algorithm groups messages into conversations with visual reply chains up to 4 levels deep.\n\n### Native macOS\n\nSwiftUI + AppKit. Dark mode, Drag & Drop, Quick Look, Share, Print. No Electron, no Java, no web wrapper.\n\n### Privacy first\n\nEverything runs locally on your Mac. No cloud, no telemetry, no data leaves your machine. Ever.\n\n### Export labels to MBOX\n\nExport any Gmail label as a standalone MBOX file. Create smaller, focused archives from your full Gmail backup.\n\n### Print & Share\n\nPrint messages with formatted headers. Share via Mail, AirDrop, Notes, and other macOS share services.\n\n### Attachments\n\nView attachments inline, preview with Quick Look (Spacebar), save individually or in bulk, drag directly to Finder.\n\n### Drag & Drop\n\nDrop MBOX or EML files onto the app to open them. Drag messages out as .eml files or drag attachments to Finder.\n\n## Performance\n\nOpens a 50 GB MBOX file in under 5 minutes. Re-opens it in under 1 second.\n\n| File Size | Messages | First Open | Re-open | RAM Usage |\n| --- | --- | --- | --- | --- |\n| 500 MB | ~5,000 | < 5 sec | < 1 sec | < 100 MB |\n| 5 GB | ~50,000 | < 30 sec | < 1 sec | < 200 MB |\n| 50 GB | ~500,000 | < 5 min | < 1 sec | < 600 MB |\n\nRe-open is always under 1 second regardless of file size, thanks to the binary index.\n\n## Pricing\n\n### Free\n\n€0 forever\n\n-   Up to 500 MB\n-   All features included\n\nComing Soon\n\n### Annual\n\n€11.95 /year\n\n-   Unlimited file sizes\n-   3 device activations\n\nComing Soon\n\nBest value### Lifetime\n\n€109.90 \\-50%\n\n€54.95 one-time\n\n-   Unlimited file sizes\n-   3 device activations\n\nComing Soon\n\nComing soon on\n\nMac App Store\n\nAll purchases include a license key for 3 devices.\n\nPayments processed securely by Lemon Squeezy (a Stripe company). VAT included.\n\nNeed more licenses or activations? [Contact us](https://colorvivo.com/contacto/).\n\n## Get Early Access\n\nBe the first to know when Mbox Viewer is ready. Subscribe to receive early access to the first version.\n\n Notify Me\n\n I accept the [Privacy Policy](https://mboxviewer.net/privacy/)\n\nWe only store your email. No spam, ever.\n\n**Search SyntaxPowerful search with full query syntax. Use the search bar or the visual filter sheet (Cmd+Shift+F).Show full search syntax reference Hide search syntax**\n\n## Search Syntax\n\nPowerful search with full query syntax. Use the search bar or the visual filter sheet (Cmd+Shift+F).\n\nShow full search syntax reference Hide search syntax\n\n| Prefix | Example | Description |\n| --- | --- | --- |\n| from: | from:[\\[email protected\\]](https://mboxviewer.net/cdn-cgi/l/email-protection) | Messages from this sender |\n| to: | to:team@ | Messages sent to this address |\n| cc: | cc:manager | Messages CC'd to this person |\n| subject: | subject:\"quarterly report\" | Subject contains phrase |\n| body: | body:invoice | Full-text body search (press Enter) |\n| has:attachment | has:attachment | Messages with attachments |\n| has:no-attachment | has:no-attachment | Messages without attachments |\n| label: | label:Important | Gmail label |\n| filename: | filename:report.pdf | Attachment filename |\n| date: | date:2024-03 | Messages from March 2024 |\n| before: | before:2024-01-01 | Messages before date |\n| after: | after:2023-06-15 | Messages after date |\n| size:> | size:>5mb | Messages larger than 5 MB |\n| size:< | size:<100kb | Messages smaller than 100 KB |\n| \\- | \\-spam | Exclude term |\n| \"...\" | \"exact phrase\" | Exact phrase match |\n| OR | from:alice OR from:bob | Either condition |\n| (implicit) | invoice 2024 | Both terms (AND) |\n\n## Frequently Asked Questions\n\n**What is an MBOX file?**\n\nMBOX is a standard format for storing email messages. Gmail's Google Takeout exports your emails as MBOX files. Many email clients and servers use this format for backups and archives.\n\n**How do I back up my Gmail as MBOX?**\n\n1\\. Go to [takeout.google.com](https://takeout.google.com/) and sign in with your Google account. 2. Click \"Deselect all\", then scroll down and check only \"Mail\". 3. Click \"All Mail data included\" to choose specific labels, or leave it to export everything. 4. Click \"Next step\", choose your export format (e.g. .zip), file size, and delivery method. 5. Click \"Create export\" — Google will prepare your archive (this can take hours or days for large accounts). 6. Download the .zip file when ready, extract it, and open the .mbox file with Mbox Viewer. Once exported, you have a full offline backup of your Gmail that you can read anytime without internet.\n\n**Can it open very large files?**\n\nYes. Mbox Viewer uses a streaming parser that never loads the entire file into memory. It can open files of 50 GB and beyond. The first open indexes the file (takes a few minutes for very large files), and all subsequent opens are instant (under 1 second).\n\n**Does it modify my MBOX file?**\n\nNever. Mbox Viewer is strictly read-only. It creates a small index file alongside your MBOX for fast access, but never writes to the original file.\n\n**What's the difference between Free and Pro?**\n\nFree includes all features but is limited to MBOX files up to 500 MB. Pro removes the file size limit. There's no feature gating — search, export, labels, threading all work in both versions.\n\n**Can I use my license on multiple Macs?**\n\nYes. Each license allows activation on up to 3 devices. You can deactivate a device from within the app to free up a slot.\n\n**Does it support HTML emails?**\n\nYes. Mbox Viewer renders HTML emails with their original formatting. Remote images are blocked by default for privacy, with an option to load them.\n\n**What macOS versions are supported?**\n\nmacOS 14 Sonoma and later. Universal Binary — runs natively on Apple Silicon (M1/M2/M3/M4) and Intel Macs.\n",
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  ],
  "llmsTxtPreview": "# Mbox Viewer\n\n> Native macOS app for opening, searching, and exporting emails from MBOX and EML archive files. Handles Gmail Takeout exports of any size.\n\n## Main\n- [Mbox Viewer — Read MBOX Files on macOS](https://mboxviewer.net/): Native macOS app for opening, searching, and exporting emails from MBOX and EML archive files. Handles Gmail Takeout ex…\n- [Español](https://mboxviewer.net/es/)\n- [Deutsch](https://mboxviewer.net/de/)\n- [Français](https://mboxviewer.net/fr/)\n- [Português](https://mboxviewer.net/pt-br/)\n- [日本語](https://mboxviewer.net/ja/)\n- [Italiano](https://mboxviewer.net/it/)\n- [Nederlands](https://mboxviewer.net/nl/)\n- [한국어](https://mboxviewer.net/ko/)\n\n## Legal\n- [Privacy Policy](https://mboxviewer.net/privacy/)\n- [Terms of Service](https://mboxviewer.net/terms/)\n- [Refund Policy](https://mboxviewer.net/refund/)\n\n## Support\n- [Support](https://mboxviewer.net/support/)\n\n",
  "llmsTxtExisting": "# Mbox Viewer\n\n> The fastest way to read MBOX files on your Mac\n\nMbox Viewer is a native macOS application for opening, searching, and exporting emails from MBOX and EML archive files. It handles files of any size — from a few kilobytes to over 50 GB — without loading the entire file into memory. Platform: macOS 14 Sonoma or later (Universal Binary: Apple Silicon + Intel). Privacy: 100% local processing — no cloud, no telemetry, no data leaves the Mac. Free version includes all features up to 500 MB. Pro removes the file size limit (annual €11.95/year or lifetime €54.95).\n\n## Documentation\n\n- [Full documentation](https://mboxviewer.net/index.md): Complete product information, features, pricing, search syntax, and FAQ\n- [Full documentation (Español)](https://mboxviewer.net/es/index.md): Documentación completa en español\n\n## Product\n\n- [Website](https://mboxviewer.net): Main product page with features, performance benchmarks, and pricing\n- [Website (Español)](https://mboxviewer.net/es/): Página del producto en español\n- [Website (Deutsch)](https://mboxviewer.net/de/): Produktseite auf Deutsch\n- [Website (Français)](https://mboxviewer.net/fr/): Page produit en français\n- [Website (Português BR)](https://mboxviewer.net/pt-br/): Página do produto em português\n- [Website (日本語)](https://mboxviewer.net/ja/): 日本語の製品ページ\n- [Website (Italiano)](https://mboxviewer.net/it/): Pagina del prodotto in italiano\n- [Website (Nederlands)](https://mboxviewer.net/nl/): Productpagina in het Nederlands\n- [Website (한국어)](https://mboxviewer.net/ko/): 한국어 제품 페이지\n- [Website (Polski)](https://mboxviewer.net/pl/): Strona produktu po polsku\n\n## Legal\n\n- [Privacy Policy](https://mboxviewer.net/privacy/): No data collection, no telemetry, fully local processing\n- [Terms of Service](https://mboxviewer.net/terms/): Software license terms\n- [Refund Policy](https://mboxviewer.net/refund/): Refund policy handled by Lemon Squeezy\n\n## Support\n\n- [Support](https://mboxviewer.net/support/): Get help and report issues\n- [GitHub](https://github.com/dcarrero/mboxshell): Open source base project (mboxShell, MIT license)",
  "snippets": [
    {
      "id": "add_content_signals",
      "title": "Add Content-Signal HTTP header",
      "description": "The Content-Signal header tells AI agents about the nature of your content. Add it via your web server or CDN.",
      "language": "nginx",
      "code": "# Nginx — add to your server block:\nadd_header Content-Signal \"type=website; lang=en\" always;\n\n# Apache — add to .htaccess:\n# Header set Content-Signal \"type=website; lang=en\"",
      "filename": "nginx.conf or .htaccess"
    },
    {
      "id": "add_markdown_negotiation",
      "title": "Support Accept: text/markdown",
      "description": "When a client sends Accept: text/markdown, respond with a Markdown version of the page. This is the gold standard for AI-readiness.",
      "language": "nginx",
      "code": "# Nginx — serve .md files when client requests Markdown:\n# Option 1: Serve pre-generated .md files\nmap $http_accept $markdown_suffix {\n  default \"\";\n  \"~text/markdown\" \".md\";\n}\n\n# Then in your location block:\ntry_files $uri$markdown_suffix $uri =404;\n\n# Option 2: Use your app framework to check the Accept header\n# and return Markdown content with Content-Type: text/markdown",
      "filename": "nginx.conf or application code"
    }
  ]
}

APIを使用してプログラムで取得できます（近日公開）