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
| Description | Qty | Unit Price | Amount |
|---|
| Description | Qty | Unit Price | Amount |
|---|
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.
Estimate ovulation day and fertility window from last menstrual period. Displays probable conception dates. Informational only; processes locally in browser.
Generate a realistic, random user‑agent string for desktop, mobile, or bot. Perfect for API testing and scraping.
Record audio directly from your microphone and download it as a WAV file. Perfect for quick notes. No upload, fully offline support.
Set any future date and see a live countdown in days, hours, minutes, seconds. Fun animated display. Save multiple countdowns locally.
Use your microphone to dictate text and see it appear live. Also upload an audio file for basic transcription. All local.
Use your microphone to dictate text and see it appear live. Also upload an audio file for transcription (limited). All local.
Hear a word spoken by browser TTS and type the spelling. Choose difficulty or paste your own list. Great for kids. Local only.
Click for a warm, encouraging sentence to lift your spirits or support a friend. Small positive boost. No repeats.
Answer questions and see typical milestones for 0-5 years. Educational reference for parents. Not a diagnostic tool.
Convert pixel values to em and rem units based on a base font size. Bidirectional. Must‑have for front‑end developers.
Set a list of agenda items with allocated minutes. Advance through speakers and see remaining time visually. Keep meetings on track.
Generate CUIDs that are optimized for horizontal scaling and collision resistance. Great for client‑side IDs. Pure JavaScript.
Paste your speech, set time limit, and practice with a pacing indicator (words per minute). Refine delivery.
Paste text and set display speed for Rapid Serial Visual Presentation. Train your reading speed.
Paste HTML and see a before/after comparison of minified output. Check the byte savings. All local.
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.
Test your browser's built‑in speech recognition. Speak and see the transcribed text appear live. Must‑have for voice app devs.
Change the text input cursor color. See the effect live. Copy the minimal CSS. Simple but delightful.
Simple phase cancellation tool: load a stereo track and attempt to remove center‑panned vocals. Not perfect, but fun to experiment.
Track days of sobriety with a motivational counter and milestone celebrations. Set quit date and see time elapsed in days, hours, minutes. Private & local.
Tap a glass icon each time you drink a cup of water. See your daily intake. Reminders optional. Local storage.
Simple tracker to record potty attempts, successes, accidents. See patterns. Data stays local. Aids in toilet training journey.
Request a USB device and communicate with it using the Web USB API. See vendor and product IDs. Experimental.
Paste robots.txt content and parse it to check validity, find disallowed paths. Educational SEO tool. Local processing.
Paste your script and get an approximate speech duration based on slow/average/fast pace. Avoid overtime.
Hear text spoken word by word with boundary events. See the exact index and character. Advanced TTS dev tool.
Get a short, thought‑provoking insight or proverb. A moment of reflection. Works offline.
Learn to aim a signal mirror by aligning a virtual finger and target. Simulates the retro‑reflective mesh technique. Practice before you need it.