Six focused tools for the small tasks between the big tasks. Responsive, accessible, and private by design.
- JSON formatter — format, minify, validate, copy, and download JSON. Import a local
.jsonfile with the file picker or drag-and-drop (up to 5 MB). Failed imports preserve your current work. Two or four space indentation and Ctrl/Cmd + Enter. - Colour converter — convert HEX, RGB, and HSL, use a colour picker, and copy values. Includes a live foreground/background contrast checker with WCAG 2.2 AA/AAA text-contrast results.
- Markdown preview — live preview with headings, lists, quotes, emphasis, links, and fenced code blocks. Raw HTML is escaped. This is a lightweight Markdown subset, not full GitHub Flavored Markdown.
- Word counter — words, Unicode characters, estimated sentences, paragraphs, and estimated reading time.
- Note pad — a plain-text notepad with multiple auto-saving tabs. Add, rename, switch, and close notes; copy or download the current tab as
.txt/.md. Closing or clearing a note requires confirmation. Existing single notes migrate into the first tab. - URL toolkit — inspect HTTP(S) URLs, edit duplicate or empty query parameters, encode/decode components or full URLs, and generate QR codes with PNG/SVG export. URLs are processed in memory, never fetched or saved.
- Dark and light themes. Tool editor content stays in memory and clears on refresh; Note pad tabs and the theme preference persist in this browser.
Requires Node.js 18 or newer. No dependency installation or build step.
node server.cjsOpen http://127.0.0.1:4173. Run all checks with node --test. If npm is installed, npm start and npm test work too.
docs/ is the complete deployable site. core.js contains pure conversion and rendering functions, app.js handles interactions, and style.css contains responsive themes. The first version uses plain JavaScript to remain small and dependency-free.
Open an issue describing the problem or feature, create a branch, and submit a focused pull request. Include a brief description and verification steps. Credit real collaborators with a Co-authored-by commit trailer when appropriate.
- Markdown tables — safe table rendering, inline formatting, and alignment.
- Colour palette export — collect colours and export CSS or JSON.
Comment on an issue before starting so we can agree on the approach. Keep pull requests focused, add tests for changed behaviour, and include screenshots for visible UI changes.
The live site publishes from main → /docs. Merging a pull request that changes that folder automatically triggers a new Pages deployment. No build step is needed.
The contrast checker uses the W3C relative luminance and contrast guidance. Pass/fail results use unrounded ratios; the displayed ratio is rounded to two decimal places. The tool evaluates opaque text colours, not overall page accessibility.
All tool processing happens in the browser. No analytics, external fonts, external APIs, or remotely loaded scripts are used. The hosting provider receives ordinary page requests. Clipboard access requires a secure context or localhost.
Note pad tabs, names, content, and the selected tab use local storage on the current browser and site origin; they do not sync between devices. Avoid storing passwords or API keys. Clearing browser data removes notes. Export a backup when you need to keep a note. If saving fails (for example, storage is disabled or full), the draft remains in memory and the app shows a warning; download it before leaving. Notes changed in another tab trigger a notice instead of replacing your current draft.
MIT — see LICENSE.
QR codes use qrcode-generator 1.4.4 by Kazuhiko Arase (MIT), bundled in docs/vendor/qrcode.js. No external QR service is used. See THIRD_PARTY_NOTICES.md for attribution and license.