ZIDOOKA Tools Journal
Practical guides for small tools
Short tutorials, troubleshooting notes, and workflows built around the tools people already use.
ログインなしで使える Markdown Preview & PDF を作った理由
Markdown を PDF にしたいだけなのにログインを求められる。その小さな不便をなくすため、プレビュー付きの Markdown PDF ツールを作りました。
Search demand is already forming around this topic, so this guide answers the question directly and points back to the fastest tool path.
Why I Built a No-Login Markdown Preview & PDF Tool
I wanted a simple Markdown to PDF tool with live preview, font options, and no login wall. So I built one for everyday writing work.
Markdown を PDF にするなら、プレビューも同じ画面に欲しい
PDF にしたあとで直したくなる。その往復を減らすため、Markdown 編集とプレビューを2カラムで並べました。
Markdown to PDF Works Better with Live Preview
A Markdown to PDF workflow should let you edit and preview in the same place, because most PDF fixes start in the original Markdown.
フォント・ヘッダー・フッターまで整える Markdown PDF
Markdown を PDF にするだけでなく、フォント、ページ番号、ヘッダー、フッターを Settings から調整できるようにしました。
Fonts, Headers, Footers: Making Markdown PDFs Feel Like Documents
Markdown Preview & PDF now supports font choices, page numbers, headers, footers, line numbers, and Markdown lint from Settings.
Weeks From Today: How to Get the Exact Date Fast
Need the date 1, 3, or 7 weeks from today? Use a weeks-from-today calculator to avoid off-by-one mistakes and copy the result instantly.
改行・空白を一気に消す方法。貼り付け前の整形を速くする
改行削除、空白削除、タブ削除をまとめて行いたいときの使い方を、差分付きスクリーンショットでわかりやすく紹介します。
How to Count CSV Columns Before an Import Breaks
Check CSV rows, columns, and the detected delimiter before importing into Excel, Sheets, or a database.
Daily Report Time Calculator: Add Tasks and Get the End Time
Add task durations plus travel time, then calculate the expected end time or the required start time for a daily report.
How to Add Mosaic Blur to an Image in Your Browser
Use a browser-based mosaic image tool to pixelate faces, names, or sensitive areas without uploading the file anywhere.
Pomodoro vs Interval Timer: Which Should You Use?
Both timers help you structure time, but they serve different purposes. Learn when to use each and how to combine them for maximum productivity.
Why ChatGPT Adds UTM Parameters and How to Remove Them
Every link you copy from ChatGPT includes utm_source=chatgpt.com. Here's why it happens and how to clean URLs before sharing.
CSV Delimiter Problems: Why Your Import Fails and How to Fix It
CSV imports failing? 9 times out of 10 it's a delimiter mismatch. Here's how to detect and fix separator issues in seconds.