Everything in the catalog

Plays a sound at set intervals to remind you to pause, breathe and take a mindful break.

Build tier lists with movable colored tiers, imported images, GIF support, and export as an image or JSON.

面向中国大陆行程的 AI Agent Skill：整合官方、高德、小红书、美团和国内 OTA，生成可校验的对话攻略与响应式 HTML，支持 npx 安装和引导式线上部署。

A Trip planner that actually does trip planning

Simple habit tracking app shipped as an offline-oriented standalone PWA, aimed at mobile screens.

Generates random Secret Santa pairings so nobody draws themselves, with a privacy-focused design.

Browse the files of any public GitHub repository in one page with a file tree filter and deep links.

1216+ free online calculators: loan EMI, mortgage, BMI, calorie, percentage, unit converter & more — step-by-step solutions, charts, no signup.

Scans QR codes with a camera or an image file, and says it works in the browser.

Build and simulate analog and digital circuits with animated current and voltage.

Rates a password and estimates how long a brute-force attack would take, without sending it anywhere.

Russian-language recipe scaler that recalculates ingredients by servings or by the weight of one ingredient.

Draws Secret Santa gift-exchange pairings for a list of participants.

Renders a line of text as large ASCII-art lettering you can copy into code comments or READMEs.

Turns a file or image into a Base64 string, or turns Base64 text back into a downloadable file.

Encodes plain text to Base64 and decodes Base64 strings back to text.

Encodes a username and password pair into the value of an HTTP Basic Authorization header.

Hashes a string with bcrypt at a chosen salt-round count and checks a string against an existing bcrypt hash.

Compares the execution time of several tasks you enter and presents the results side by side.

Creates a BIP39 mnemonic and passphrase pair from random entropy, or converts between mnemonic and passphrase.

Takes a photo or records a clip from your webcam directly in the browser and lets you download it.

Rewrites a string in camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE and similar formats.

Calculates Unix file permission values from read, write and execute checkboxes and shows the chmod command.

A browser stopwatch with start, pause, resume and lap controls for timing a task.