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.
Set a meditation session with singing bowl sounds at start, interval chimes, and end bell. No ads, pure serenity.
Sing or play an instrument into the mic and see the detected pitch on a real‑time chromatic tuner. Use for practice or ear training.
Paste a list of URLs or texts and generate QR codes all at once. Download as individual images or a single sheet.
An animated hourglass that you can set for any time. Watch the sand flow. Beautiful and calming timer.
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.
Design custom unordered and ordered lists with images, strings, or counters. Preview and copy the CSS.
Enter a MIDI note number (0–127) or a musical note name and get the exact frequency in Hz. Piano keyboard picker.
Design a custom analog clock face by choosing colors, hands, and numbers. Download as SVG or PNG. For craft or UI design.
Write HTML, CSS, and JavaScript in separate panes and see the result in real time. Store your snippets locally.
Generate classic retro sound effects (coin, jump, explosion) using oscillators and noise. Play and download as WAV. Web Audio API fun.
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.
Place rectangular pattern pieces on a virtual fabric width to optimize cutting layout and reduce waste. Simple manual drag & drop. Local only.
Generate cryptographic key pairs using the Web Crypto API. Export as JWK or raw. No server needed; pure security.
Connect to a serial device (Arduino, etc.) via the Web Serial API. Send and receive text. No native app needed.
Upload a logo to embed in the center of a QR code. High error correction so it still scans. Download PNG/SVG.
Paste lyrics and tap while the song plays to embed timestamps. Export as .lrc file for music players. All in browser.
Get a clean, commented JS plugin skeleton with IIFE or ES module pattern. Start your new library faster.
Add columns with types and constraints, then generate a SQL CREATE TABLE statement. Supports MySQL/PostgreSQL.
Trim a video clip and convert it into an animated GIF. Adjust frame rate and size. Processing stays on your computer for privacy.
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. Ideal for developers debugging time-related code.
Generate random license keys or serial numbers in various formats (XXXX-XXXX-XXXX). Useful for software activation testing. Local generation.
Generate a complete <head> section with meta charset, viewport, SEO, favicon, and social tags. Customize and copy.
Drag items into grid cells and see the resulting grid‑area or line‑based placement code. Learn how auto‑placement and spanning work.
Fill in bio, skills, projects to generate a clean HTML portfolio page. Copy the code. Local builder.
Generate encrypted passwords for .htaccess basic authentication. Create .htpasswd entries using bcrypt, MD5, or SHA. Server admin utility, local compute.
Compare visibility: hidden vs display: none. See how each affects layout and event listeners. Inline code.
Add items with category, color, season. Plan outfits. Drag and drop. Stored locally.