Everything in the catalog

Runs Python in the browser through Pyodide WebAssembly, with a code editor, .py load and save, and micropip packages.

Builds QR codes for links, WiFi logins, contacts or SMS, with color and error-correction choices and PNG or SVG download.

Catalan rewriting assistant: click a word or select text to see spelling checks and synonym alternatives from an offline thesaurus.

Write Markdown in one pane and see it rendered live, jump around via a heading outline, and open or save .md files.

Client-side TDEE and macro calculator with weight projections, diet presets and weight logging.

A click-to-edit visual editor for HTML pages made by AI tools, with text, color and font changes and clean HTML export.

Cuts a section out of a video and saves it as GIF, WebP or MP4, with controls for frame rate and output size.

Counts bicep curls from your webcam using MediaPipe pose tracking in the browser.

Generates placeholder text in a chosen length.

Drives a cartoon avatar in real time from your webcam using MediaPipe tracking.

Voice-activity detection plus Chinese speech recognition running as WebAssembly in the browser.

Privacy-focused chat page that runs an LLM in the browser using WebGPU and WebLLM.

Attaches an audio track to a video file.

Generates an arithmetic sequence from a start value, step and length.

Converts an audio file from one format to another in the browser.

Converts between bytes, kilobytes, megabytes and larger data units.

Replaces chosen words in text with a mask character.

Speeds up or slows down an audio file by a chosen factor, processing it locally in the browser.

Swaps one colour in an image for another.

Swaps the delimiter in a CSV file, for example from commas to semicolons.

Speeds up or slows down an animated GIF.

Adjusts the transparency level of an image.

Speeds up or slows down a video.

Shrinks one or many images by setting a maximum file size and quality, then downloads them as a ZIP.