STAYS LOCAL
Developer tools, available both as a website and as a command line program. The web version runs entirely in your browser: there is no backend, no account, and nothing is sent anywhere. The CLI has no runtime dependencies.
- Web: tols.arasmehmet.com
- CLI:
npm install -g tols-cli
When a web action has a CLI equivalent, the page shows its exact runnable command; a surface-specific action does not advertise an approximation.
tols json fmt @config.json
tols b64 enc "hello" | tols b64 dec
tols hash sha256 <<< "secret"| Tool | What it does | CLI |
|---|---|---|
| JSON Formatter | Format, validate and beautify JSON | tols json fmt |
| YAML Formatter | Format YAML and convert it to JSON | tols yaml fmt |
| XML Formatter | Format, validate and minify XML | tols xml fmt |
| HTML Formatter | Beautify and minify HTML | tols html fmt |
| Markdown Previewer | Preview Markdown and convert it to HTML | tols markdown html |
| Regex Tester | Test regular expressions against sample text | tols regex match |
| Diff Checker | Compare two texts with word level precision | tols diff |
| SQL Formatter | Format and beautify SQL queries | tols sql fmt |
| Tool | What it does | CLI |
|---|---|---|
| Base64 | Encode and decode Base64 | tols base64 enc |
| URL Encoder | Encode and decode URLs and query parameters | tols url enc |
| JWT Decoder | Inspect a token's header, payload and signature | tols jwt dec |
| JWT Encoder | Create and sign a token with HS256 | tols jwt enc |
| JSONP Tester | Wrap a payload in a JSONP callback | tols jsonp wrap |
| Gzip Calculator | Measure how far a payload compresses | tols gzip comp |
| Data URI Generator | Turn a file into a data URI | tols datauri enc |
| Tool | What it does | CLI |
|---|---|---|
| UUID Generator | Generate UUID v4 identifiers | tols uuid gen |
| Hash Calculator | MD5, SHA-1, SHA-256 and SHA-512 | tols hash sha256 |
| Lorem Ipsum | Generate placeholder text | tols lorem gen |
| QR Code | Generate QR codes from text or a URL | tols qr gen |
| Barcode | Generate Code128 barcodes | tols barcode gen |
| Password Generator | Generate passwords and show their entropy | tols password gen |
| Image Placeholder | Generate placeholder images | tols placeholder gen |
| Tool | What it does | CLI |
|---|---|---|
| Color Converter | Convert between HEX, RGB and HSL | tols color conv |
| Timestamp | Convert Unix timestamps to readable dates | tols timestamp conv |
| Time Zone | Convert a time between zones | tols timezone conv |
| Number Base | Convert between decimal, binary, hex and octal | tols base conv |
| Cron Parser | Explain an expression and list its next runs | tols cron parse |
| Unicode Inspector | Look up characters and their properties | tols unicode info |
| CSS Formatter | Beautify and minify CSS | tols css fmt |
| CSS Filter Generator | Build a CSS filter chain visually | tols cssfilter gen |
Run tols <tool> help for a tool's flags, or tols help for the full list.
- Shareable links for supported tools, with the tool's state encoded in the URL
- Favourites and recent tools, kept in your browser
⌘Kto search,⌘Bto toggle the sidebar- Light and dark themes
apps/web SvelteKit site, static build, deployed to GitHub Pages
packages/tols the CLI and the shared core, published to npm
The core lives in packages/tols/src/core/. Those modules use no Node specific
APIs, so the same files are imported by the CLI and bundled into the site. The
CLI adapters in packages/tols/src/tools/ wrap them in argument parsing, and
the Svelte components in apps/web/src/lib/tools/ wrap them in a UI.
Every web tool imports the shared core, so a fix lands in both places at once.
Getting there was worth it for what it turned up: the two copies had drifted,
and in eight tools the browser version was the wrong one. The site was handing
out QR codes built by an encoder that ignored half the specification, and a
barcode encoder that turned 12345 into 123405.
git clone https://github.com/arasovic/tols.git
cd tols
npm install
npm run dev| Command | Effect |
|---|---|
npm run dev |
Start the site on a local dev server |
npm test |
Run both test suites |
npm run check |
Type check the Svelte app with svelte-check |
npm run build |
Static production build into apps/web/build/ |
Every push to main runs the tests, the type check and the build before
deploying, so a red suite never reaches the site.
See CONTRIBUTING.md. Bug reports and new tools are both welcome. A new tool is wired through the shared core, the CLI registry, the web registry, the SEO metadata, the command template, and the dynamic route; see the checklist there.
MIT, see LICENSE.