gemini-extension
Gemini CLI extension to convert 140+ file formats with Conversion Tools
Install / Use
claude mcp add conversiontools -- npx -y github:conversiontools/gemini-extensionIf the server publishes to npm under a different name, use that package instead — check the repo README.
MCP Server
Model Context Protocol server
Quality Score
Category
Development & EngineeringSupported Platforms
Tags
Our assessment of gemini-extension
gemini-extension scores 75/100 on our quality scale, 3701st of 4,613 Development & Engineering skills we index.
Its MCP Server is 3.8 KB long, well organised into 12 sections with 8 code examples: a solid amount of guidance for an agent.
It has 3 GitHub stars, so there is little community track record yet; judge it on its content.
Maintenance, license and trust
- The repository was last updated 14 days ago, so gemini-extension is actively maintained.
- Our last check on 2026-08-09 found the source still online.
- It is released under the MIT license, a permissive license that allows use, modification and commercial use with attribution.
- Its trust signals score 87/100, with 2 cautions from licensing, adoption, age or documentation. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.
Safety scan
No issues foundOur scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful.
AI review by kimi-k2.7-code on 2026-10-19. Automated pattern scan on 2026-09-24. It catches known dangerous patterns, not every risk — read a skill before letting an agent act on it.
gemini-extension compared with similar skills
All 4 of these similar skills score higher than gemini-extension; compare them before choosing.
| Skill | Score | Stars | Updated | Format |
|---|---|---|---|---|
| gemini-extension (this skill)by conversiontools | 75 | 3 | 14d ago | MCP Server |
| taste-skillby Leonxlnx | 100 | 111.0k | 1d ago | CLAUDE.md |
| Agent-Reachby Panniantong | 100 | 109.5k | 1d ago | CLAUDE.md |
| headroomby headroomlabs-ai | 100 | 79.0k | today | CLAUDE.md |
| ai-job-searchby ai-job-search-dev | 100 | 70.0k | today | CLAUDE.md |
Frequently asked questions
- How do I install gemini-extension?
- Run
claude mcp add conversiontools -- npx -y github:conversiontools/gemini-extension. The install tabs above show the steps for each supported agent. - Which AI agents does gemini-extension work with?
- It is written for Claude Code, Claude Desktop and Gemini CLI, as a MCP Server file. Other agents that read the same format can often use it too.
- Is gemini-extension safe to use?
- Our scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful. It is MIT-licensed and scores 87/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
- Is gemini-extension still maintained?
- The repository was last updated 14 days ago, so gemini-extension is actively maintained.
Skill content
View source on GitHubConversion Tools - Gemini CLI Extension
Conversion Tools extension for Gemini CLI. Convert 140+ file formats directly in your terminal - no browser tabs, no copy-pasting. Or build a custom converter from a plain-language description when no standard one fits.
Part of the Conversion Tools agent integrations (Claude Code, Cursor, Codex, Grok, Gemini, plus the ctio CLI).
Install
gemini extensions install https://github.com/conversiontools/gemini-extension
Update
Pull the latest version (recommended periodically - new converters and fixes ship regularly):
gemini extensions update conversiontools
Or update every installed extension:
gemini extensions update --all
Usage
Once installed, just ask Gemini to convert files:
Convert data.json to Excel
Transform this XML file to CSV
Convert report.pdf to a Word document
Available Tools
| Tool | Description |
|------|-------------|
| convert_file | Convert a file from one format to another |
| list_converters | List available converters by category |
| find_converter | Find the best converter for specific formats |
| get_converter_info | Get detailed info about a converter |
| request_upload_url | Get upload URL for large files (over 5MB) |
| auth_status | Check authentication status |
| auth_login | Login via OAuth |
| auth_logout | Logout and clear credentials |
| studio_create_converter | Build a custom converter: create it + attach the input file |
| studio_chat | Describe the transformation in plain language; the converter is built |
| studio_run | Run the built converter on the file |
| studio_run_status | Poll the run until it finishes |
| studio_download_result | Download the result |
| studio_list_converters | List your previously built converters (to reuse one instead of rebuilding) |
| studio_get_converter | Inspect a converter's details and check it's ready to run |
| studio_attach_file | Attach a new file to an existing converter and re-run its built logic |
Supported Conversions
140+ conversion types including:
- Documents: Word, PowerPoint, Excel, Markdown, ODS to/from PDF, HTML, Text, LaTeX
- Data: JSON, CSV, XML, YAML, Parquet, JSONL, BSON, Excel - with validators and formatters
- Images: PNG, JPG, WebP, AVIF, HEIC, JXL (JPEG XL), SVG, BMP, TIFF, GIF
- PDF: Extract to Word, Excel, CSV, Text, HTML, Images (JPG, PNG, SVG, TIFF), EPUB
- Audio: MP3, WAV, FLAC - plus AI text-to-speech and speech-to-text
- Video: MP4, MOV, MKV, AVI - plus audio extraction
- E-books: EPUB, MOBI, AZW, AZW3, FB2, FBZ, PDF
- OCR: Extract text from images and scanned PDFs - output as Text or searchable PDF
- AI-powered: Smart extraction from complex documents, subtitle translation, TTS, STT
- Subtitles: SRT, VTT, ASS - bidirectional conversions
- Web: Website screenshots (URL to PDF, JPG, PNG)
- Custom (AI Studio): describe a transformation in plain language and have a reusable converter built, run, and returned - for when no standard converter fits
Authentication
On first use, you will be prompted to authenticate via OAuth. This opens a browser window to log in to your Conversion Tools account.
Free accounts get 100 conversions per month (10 per day). Paid plans available at conversiontools.io/pricing.
Examples
Convert JSON to Excel
I have a data.json file with an array of objects. Convert it to Excel.
Extract data from PDF
Extract the table from invoice.pdf to CSV
Links
License
MIT
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Trust signals
From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.