Everything in the catalog

Previews G-code toolpaths in 3D and reports print stats, with files processed locally.

Previews a title and description as they would appear in Google search, privately in the browser.

Browser-based grammar and spell checker that keeps pasted text on the device with no tracking.

Check off habits each day, see streaks and progress; entries persist in your browser's local storage.

Computes an HMAC-SHA256 signature for a message and secret key in the browser.

Click any pixel of an uploaded image to read its HEX and RGB values; the page says it stays on your device.

Resizes images to chosen dimensions in the browser.

Checks image dimensions against social media presets and resizes them in the browser.

Compresses and resizes images in the browser, with JPEG, PNG and WebP output.

Compresses PNG, JPG, WebP and SVG images; the page states files stay in your browser.

Views STL files with files parsed locally and can export to OBJ or GLB.

Shows employee INPS social security contributions.

Invoice maker with 10 templates, multi-currency support and tax presets that works wholly in the browser.

Batch converts images between formats, up to 50 files, with optional background removal.

In-browser JSON to CSV converter with an editable table preview and one-click export.

Creates random HS256, HS384 and HS512 signing secrets for Node, Python and Java apps.

Monthly Indonesian take-home pay after PPh 21 and BPJS contributions; the site says data stays in the browser.

Reads a cluster snapshot, flags over-provisioned workloads and estimates the wasted spend.

Dutch-language viewer that renders a dropped .md file as a readable page, locally in the browser.

Converts between metres, kilometres, feet and miles with a live result in the browser.

Builds UTM links and also offers meta tag, OG preview and JSON tools, with saved templates.

Calculates net income from a Polish umowa zlecenie.

Builds a Markdown pipe table visually with row, column and alignment controls and copies the syntax.

Create, preview and export Mermaid diagrams as SVG or PNG in the browser.