Guides
ガイド
ブラウザ上でファイルを安全に扱うための実践的なガイドとインサイト。各記事から直接ツールへアクセスできます。
Auto-Generate Subtitles for Video & Audio: Free, In-Browser, No Server Upload
How to pull captions from audio and video for free, right in your browser with Whisper — plus accuracy tips. Local-first, so your audio stays on your device by default.
5 Checks Before You Hand a Sensitive Document to an AI
Five things to check before feeding a contract, résumé, or medical record to an AI — a practical bar that keeps both convenience and privacy.
AI Translation: Don't Just Paste It Into a Translator — A Practical Guide to Prompting
Stop pasting your source text and just saying 'translate this.' A hands-on guide to AI translation prompts that set the role, context, and glossary to produce natural, human-sounding results — plus what to double-check afterward.
The Complete Guide to Image Formats: WebP, PNG, and JPG Differences and How to Use Each in Practice
How the three main web image formats differ and how to pick the best one for each situation—plus a way to convert them right in your browser.
Privacy in the AI Era: 7 Practical Ways to Protect Your Files
7 concrete and actionable rules to safeguard your data while using AI tools.
Creating Your Own Claude Skills: An Introduction to skill-creator and mcp-builder
Learn how to bundle repetitive tasks into Claude skills, create skills using the official skill-creator, and connect external tools with mcp-builder.
Merging and Splitting PDFs Entirely in Your Browser, No Upload Required
How to combine several PDFs into one or pull out only the pages you want, processed safely inside your browser without uploading your files to a server.
How to Shrink a Large PDF in One Go — Without Quality Loss or Leak Worries
Practical ways to slim down heavy PDFs that keep hitting email-attachment or upload limits.