ERoo - A free ER diagram creation tool that works in your browser

A directory map is a diagram that represents the hierarchical structure of folders and files. With this tool, you can create a tree for README or a site structure diagram simply by placing folder 📁 and file 📄 nodes and connecting them with arrows.

ブラウザだけで完結。登録不要。 入力データは外部に送信しません。フリーランス · 店舗 · オフィス · イベント幹事が抱える「すぐ終わらせたい」実務を、このブラウザだけで。

This is a web app where you can create your own personal vocabulary notebook just by pasting CSV files or text. You can easily register content by simply copying and pasting in the format "question,answer", and you can efficiently repeat learning on difficult problems.

CodeDiff Checkerは、2つのコードやテキストの差分を視覚的に確認できる無料のオンラインツールです。登録不要・インストール不要で、ブラウザだけで使えます。コードはサーバーに送信されないため

Save and organize URLs at lightning speed. A memo app where you can add items with one tap from a shared sheet.

You can easily create PDF documents ✏️ Markdown translates directly to paper 📄 There's also a free tier 🌱 Very convenient!

AA (ASCII art) is convenient when conveying UI images to LLMs (AI). While you could try to convey images visually, that only works with multimodal-capable models. However, with AA, even LLMs with very low parameters can read and understand it. You can convey UI images without being limited by the model type. Plus, with AA, you can make edits in a text editor. No specialized tools are needed. However, creating AA is difficult. That's why I created a tool that makes it easy to generate AA by arranging parts in a PowerPoint-like interface. It supports .md, .txt, and .png output. It has layer separation functionality, real-time preview, and the ability to load and reference images while creating, so I believe it has sufficient performance for practical use.

clip-path ジェネレーターとは、CSSのclip-pathプロパティの値を、図形をドラッグするだけで作れる無料ツールです。

Just a circuit simulator. You can make calculators, games, anything.

Super easy skill sheet creation Lightning-fast Excel output from career history input. Never miss entering your career history again.

Desktop app that displays a list of PDF file thumbnails

いつでも手軽に使える永久無料の100+ツール集。ちょっと困ったときの便利アイテムです。

A Chrome extension that converts household account books and reading logs saved in Notion into 10 types of graphs with one click. For Notion enthusiasts, no coding required, 2-minute setup.

A tool to view Markdown files beautifully

This is a customer management system specialized for voice actors. It may also be usable as a request destination list for customers. ✅ No installation required - works with just a browser ✅ Can be introduced to other people ✅ Can be operated completely free of charge

気軽に投票、結果はみんなで引用できるオープンデータに

It is an app that allows you to edit PDFs on the web. You can perform various operations such as viewing, merging and splitting files, adding watermarks, and editing properties.

シンプルに作ったデータ検索サイト

Excelの工程管理、そろそろ卒業しませんか？

This is a Mermaid Editor-type application that can directly convert Mermaid into flowcharts and mind maps. Compared to existing editors, it allows you to freely customize the appearance and styling. As a trial, we've equipped it with Google's Built-in AI functionality, so you can output code in Mermaid format within the app. However, since this requires various setup procedures, if it's too much trouble, you can simply paste code that you've generated from ChatGPT, Gemini, or similar services directly into the app.

A Markdown view & edit app specialized in beautifully displaying and making Markdown files easy to read.

Let's create and run Python code with a Scratch-like feel!

An app for creating animated captions/text overlays that can be used in short videos