Simple Invoice Generator - Online Create & Print Invoices Free
Fill in your details and generate a professional-looking invoice ready to print or save as PDF. No sign-up, all data stays on your device. Great for freelancers.
UD5 Toolkit
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Fill in your details and generate a professional-looking invoice ready to print or save as PDF. No sign-up, all data stays on your device. Great for freelancers.
Build a properly formatted robots.txt file with user-agent rules and sitemap location. Validate syntax in real time. Essential for webmasters.
Generate a Lit Element web component skeleton with styles and properties. Copy and start coding immediately.
Fill in title, date, time, and location to generate a downloadable .ics meeting invitation. Works with all major calendars.
Paste your own text and generate a random sentence that mimics its style. Use for creative writing prompts or testing. Fully local.
Register a service worker, subscribe to push, and send a test notification using a VAPID key pair. Step‑by‑step demo.
Create a random, aspirational quarterly objective with unrealistic key results. For meeting icebreakers.
Adjust opacity visually with a slider and see the different CSS representations (opacity property vs RGBA/HSLA). Copy best option.
Generate a realistic, random user‑agent string for desktop, mobile, or bot. Perfect for API testing and scraping.
Set watering schedules for multiple plants with visual alerts. Shows which plants need water today based on last watered date. Data stored locally.
Set any future date and see a live countdown in days, hours, minutes, seconds. Fun animated display. Save multiple countdowns locally.
Paste robots.txt content and parse it to check validity, find disallowed paths. Educational SEO tool. Local processing.
Assign Secret Santa pairings from a list of names with spouse/partner exclusions. Optionally email results via mailto link. Fully local, no server.
Convert volumetric flow rate units: gallons per minute, liters per second, cubic meters per hour. Useful for plumbing and hydraulics.
Paste a robots.txt file and validate its syntax. See if a specific user‑agent can access a path. Essential for webmasters.
Paste HTML and see a before/after comparison of minified output. Check the byte savings. All local.
Record your screen, window, or tab with audio directly in the browser. Download as WebM. No extension required.
Record your screen, window, or tab with audio directly in the browser. Download the recording as a WebM file. No upload.
Convert REM values to pixels and vice versa based on your root font size. Essential for scalable web typography.
Enter a URL and generate a responsive iframe embed code with correct aspect ratio. Supports YouTube, maps, and more.
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.
Record feeding times, side (left/right for nursing) or oz for bottle. Track daily patterns. Data stays in your browser. Simple newborn helper.
List all available TTS voices on your system. Test each with any text. Adjust rate and pitch. Find the best voice.
Create a reflection effect for images or text using box‑reflect. Adjust direction and offset. Copy the CSS.
Select any HTML element on a page and capture its screenshot. Download as PNG. Perfect for bug reports. JavaScript API demo.
Set a list of agenda items with allocated minutes. Advance through speakers and see remaining time visually. Keep meetings on track.
Track attendance for multiple subjects. Mark present/absent and see percentage. Data in localStorage. Simple student tool.
Test your browser's built‑in speech recognition. Speak and see the transcribed text appear live. Must‑have for voice app devs.
Paste text and align it left, center, right, or fully justify by inserting spaces. Simple formatting helper. Pure browser.
Convert pixel values to em and rem units based on a base font size. Bidirectional. Must‑have for front‑end developers.