The latest articles on DEV Community by Hiroshi Ishizaka (@ishizakahiroshi). https://dev.to/ishizakahiroshi https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3912564%2Fa0868cb4-5c2a-4e9c-accf-12f4e1de96c1.jpg https://dev.to/ishizakahiroshi en Hiroshi Ishizaka Mon, 04 May 2026 17:44:12 +0000 https://dev.to/ishizakahiroshi/i-built-an-offline-first-markdown-editor-that-runs-as-a-single-html-file-53ii https://dev.to/ishizakahiroshi/i-built-an-offline-first-markdown-editor-that-runs-as-a-single-html-file-53ii <p>Most Markdown editors today assume cloud sync, Electron, or heavy installations.</p> <p>I wanted something simpler.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flku7o5cu0glmgufvqh2u.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flku7o5cu0glmgufvqh2u.png" alt="App screenshot" width="800" height="430"></a></p> <p>I wanted a Markdown editor that:</p> <ul> <li>Works fully offline</li> <li>Opens local <code>.md</code> files directly</li> <li>Saves back to the original file</li> <li>Requires no account, no sync, and no network calls</li> </ul> <h3> Demo Video </h3> <p>Watch the demo video on GitHub:</p> <p><a href="https://github.com/user-attachments/assets/00d80cbc-ca93-4cfd-86d3-5299895d06b7" rel="noopener noreferrer">https://github.com/user-attachments/assets/00d80cbc-ca93-4cfd-86d3-5299895d06b7</a></p> <p>So I built <strong>offline-md-editor-viewer</strong>.</p> <p>It runs as a single HTML file, which means it works on Windows, Linux, and macOS.</p> <p>I also built a desktop version using Tauri, but both versions share the same frontend.</p> <h3> Main features </h3> <ul> <li>Live preview while editing</li> <li>Folder tree support</li> <li>Dark / Light theme</li> <li>Local file editing and overwrite save</li> <li>Privacy-focused design</li> </ul> <p>GitHub:<br> <a href="https://github.com/ishizakahiroshi/offline-md-editor-viewer" rel="noopener noreferrer">https://github.com/ishizakahiroshi/offline-md-editor-viewer</a></p> <p>I'd love feedback from developers who work with local notes, docs, or markdown files.</p> webdev html opensource productivity Hiroshi Ishizaka Mon, 04 May 2026 17:44:12 +0000 https://dev.to/ishizakahiroshi/i-built-an-offline-first-markdown-editor-that-runs-as-a-single-html-file-1g18 https://dev.to/ishizakahiroshi/i-built-an-offline-first-markdown-editor-that-runs-as-a-single-html-file-1g18 <p>Most Markdown editors today assume cloud sync, Electron, or heavy installations.</p> <p>I wanted something simpler.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flku7o5cu0glmgufvqh2u.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flku7o5cu0glmgufvqh2u.png" alt="App screenshot" width="800" height="430"></a></p> <p>I wanted a Markdown editor that:</p> <ul> <li>Works fully offline</li> <li>Opens local <code>.md</code> files directly</li> <li>Saves back to the original file</li> <li>Requires no account, no sync, and no network calls</li> </ul> <h3> Demo Video </h3> <p>Watch the demo video on GitHub:</p> <p><a href="https://github.com/user-attachments/assets/00d80cbc-ca93-4cfd-86d3-5299895d06b7" rel="noopener noreferrer">https://github.com/user-attachments/assets/00d80cbc-ca93-4cfd-86d3-5299895d06b7</a></p> <p>So I built <strong>offline-md-editor-viewer</strong>.</p> <p>It runs as a single HTML file, which means it works on Windows, Linux, and macOS.</p> <p>I also built a desktop version using Tauri, but both versions share the same frontend.</p> <h3> Main features </h3> <ul> <li>Live preview while editing</li> <li>Folder tree support</li> <li>Dark / Light theme</li> <li>Local file editing and overwrite save</li> <li>Privacy-focused design</li> </ul> <p>GitHub:<br> <a href="https://github.com/ishizakahiroshi/offline-md-editor-viewer" rel="noopener noreferrer">https://github.com/ishizakahiroshi/offline-md-editor-viewer</a></p> <p>I'd love feedback from developers who work with local notes, docs, or markdown files.</p> webdev html opensource productivity