Everything in the catalog

Paste text copied from Apple Notes and get Markdown and HTML with links and formatting kept.

Analyzes SQLite queries with APSW running in an in-browser Python environment.

Interactive page for testing how screen readers announce live region updates.

Shows live frequency bars from your microphone using the Web Audio API.

Reacts to microphone sound with eight animated modes such as plasma, particles, tunnel and fire.

Decodes a base64 string and decompresses the gzip data inside it.

Shows any text full-screen in large type with font, color and gradient options, and keeps the settings in a shareable URL.

Turns a Bluesky handle into its DID via the AT Protocol API.

Shows the posts a given Bluesky user has liked.

Lists posts that quote a given Bluesky post.

Checks a Bluesky account's recent posts for timing and engagement patterns typical of reply bots.

Set of drag-to-install bookmarklets for web development and everyday browsing.

Draw a box on an image and read the region back as normalized percentage coordinates.

Displays a Bugzilla bug with its comments and history as a clean timeline.

Looks up US places and their American Community Survey statistics via the Census Reporter API.

Renders a pasted Claude API JSON response with its citations displayed alongside the text.

Shows a Claude Code session .jsonl file as a searchable, filterable timeline.

Counts tokens for text and image attachments across several Claude models using Anthropic token-counting API and your key.

Shows every format present on your clipboard after a paste, including text, HTML and images.

Opens a Codex rollout .jsonl file as a searchable, filterable timeline.

Step-by-step recipe timer that tracks elapsed time and upcoming tasks, with saved recipes.

Chat client that connects from the browser to any OpenAI Responses-compatible endpoint, such as OpenRouter.

Builds an HTTP request from the browser and shows which response headers and body the page is actually allowed to read.

Tune offset, blur, spread, color and opacity with sliders and copy the CSS box-shadow.