Stopwatch & Countdown Timer - Online Dual Tool
Dual-function tool: a precise stopwatch with laps and a configurable countdown timer with alarm sound. Works offline, perfect for activities.
UD5 Toolkit
Multiple preset countdowns for all your cooking needs
No active timers
Click a preset above or create a custom timer to get started!
Dual-function tool: a precise stopwatch with laps and a configurable countdown timer with alarm sound. Works offline, perfect for activities.
An animated hourglass that you can set for any time. Watch the sand flow. Beautiful and calming timer.
Paste a list of URLs or texts and generate QR codes all at once. Download as individual images or a single sheet.
Design custom unordered and ordered lists with images, strings, or counters. Preview and copy the CSS.
Design a custom counter style with symbols, range, and speak‑as. Preview ordered lists with your new style. Export the CSS rule.
Generate the next sequential invoice number with optional prefix and date stamp. Keep track locally or export.
Create .srt subtitle files manually by adding lines and setting times with a simple player. Download the result. Local.
Convert any human‑readable date to a Unix timestamp in seconds or milliseconds. Also shows ISO 8601. Clean interface.
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. Ideal for developers debugging time-related code.
Number each line of your text sequentially. Customize start number and format. Useful for code snippets, tutorials, and document review. Private operation.
Upload a photo to create a numbered painting canvas with color swatches. Print and paint. Local only.
Connect to a serial device (Arduino, etc.) via the Web Serial API. Send and receive text. No native app needed.
Generate cryptographic key pairs using the Web Crypto API. Export as JWK or raw. No server needed; pure security.
Record audio from your microphone and export as a WAV file. Monitor levels. Processed entirely in your browser.
Record audio from your microphone and export as a WAV file. Monitor levels. Processed entirely in your browser.
Write HTML, CSS, and JavaScript in separate panes and see the result in real time. Store your snippets locally.
Paste a phone number and format it according to the E.164 standard. Identify country and detect common typos. Local parser.
Generate random license keys or serial numbers in various formats (XXXX-XXXX-XXXX). Useful for software activation testing. Local generation.
Get a clean, commented JS plugin skeleton with IIFE or ES module pattern. Start your new library faster.
Generate classic retro sound effects (coin, jump, explosion) using oscillators and noise. Play and download as WAV. Web Audio API fun.
Upload multiple SVGs and combine them into a single SVG sprite sheet with `<symbol>` and `<use>`. Fast icon system.
Combine random character, setting, conflict, and genre to generate unique story prompts. Over 10,000 possible combinations. Perfect for overcoming writer's block.
Fill in container image and ports. Generate a Deployment and Service YAML with best practices. Start your K8s journey.
Compare visibility: hidden vs display: none. See how each affects layout and event listeners. Inline code.
Flip images vertically or horizontally, and rotate in 90° increments. Quick and simple editing right in the browser. Download the corrected image instantly.
Generate a subtle or heavy noise/grain texture as a CSS background. Adjust intensity and color. Copy the small code.
Generate a grey placeholder image with custom text and dimensions. Data URI output. No external service.
Generate custom placeholder images for mockups and layouts. Specify dimensions, colors, and text. Export as PNG or use the generated data URI. Entirely browser-based.
Build an accessible modal using the native <dialog> element. Customize backdrop, content, and open/close logic. Copy the code.
Use the <template> tag to hold hidden HTML that is cloned and injected by JavaScript. Common pattern.