Digital Business Card Creator - Online vCard & Shareable
Design a digital business card with your photo, contact details, and social links. Download as vCard or share a URL. Local tool.
UD5 Toolkit
Create scannable digital business cards instantly. Generate a QR code containing your contact details in vCard format — free, no signup required.
Your QR code will appear here
Fill in at least a name to generate
Design a digital business card with your photo, contact details, and social links. Download as vCard or share a URL. Local tool.
Enter the dimensions of your insert and get the correct envelope size (DL, C6, etc.). Quick mail guide.
Create a CAA DNS record to specify which certificate authorities can issue SSL certs for your domain. Prevent mis‑issuance.
Write Q&A in a simple format and export as a CSV file compatible with Anki. Perfect for rapid card creation. Local.
Format a list of Q&A pairs and export as a CSV ready for Anki import. Simple line‑based template. Local.
Generate cryptographically secure BIP39 mnemonic phrases (12 or 24 words) for HD wallet seeds. All entropy generated locally.
Create cards and review using a spaced repetition algorithm (Leitner box simulation). Cards stored locally. Improve exam prep.
Manually manage flashcards with 5 virtual Leitner boxes. See when to review each box next. All data local storage.
Classic memory card game with emoji or color themes. Select grid size and try to find all pairs in minimum moves. Brain training fun.
Classic flip‑to‑match pairs game. Choose grid size and card theme. Tracks moves and time. All local.
Shows each character's 7‑bit or 8‑bit binary representation. Includes space separation. For learning binary encoding.
Paste an enciphered text and instantly see all 25 possible shifts. Highlight the most plausible.
Paste words with translations, shuffle, test yourself. Simple local spaced recognition.
Adjust page characteristics (image size, server delay, layout shift) and see the simulated Core Web Vitals scores. Understand what impacts performance.
Merge an SRT subtitle file onto a video directly in the browser. Preview and download the resulting video. All local.
Enter a URL and get a quick simulation of First Contentful Paint, LCP, and CLS using browser metrics. Lightweight alternative.
Create scary, glitched text using combining diacritical marks. Control intensity. Perfect for horror memes and fun. Pure Unicode magic in browser.
Convert any text into JavaScript‑style \uXXXX escape sequences and vice versa. Handles emojis. Useful for i18n development.
Paste word pairs (or load pre-made sets) and practice with randomized flashcards. Flip to reveal translation, mark as known/unknown. Local data, no login.
Convert plain text into leet (1337) speak and decode it back. Great for gamer tags and online culture. Fun, free, and local.
Create printable sight word flashcards from Dolch or Fry lists by grade level. Choose font size and card layout. Local only.
Convert subtitle files between SRT and WebVTT formats. Also shift all timestamps forward/backward. Works locally.
Generate a random first and last name typical for US, UK, or Australia. With optional middle initial. Useful for test data.
Enter a human name and translate it into a weird alien-sounding version using letter replacement rules.
Deep-dive into text with detailed character and letter frequency analysis. Supports multiple languages and includes whitespace control. Fast and private.
Open the same page in two tabs and send messages between them. See real‑time cross‑tab communication. Learn the API.
Enter a list of buzzwords or concepts and shuffle them into random pairs. Stimulate creative thinking. All local.
Get random gift suggestions based on recipient age, relationship, and occasion. Browse through curated, gender-neutral ideas. No affiliate links, pure inspiration.
Create a temporary chat room between two browser tabs or devices on the same network using WebRTC data channels. Copy the code.
Convert standard Arabic numbers into formal Japanese/Kanji numerals (e.g., 123 → 百二十三). Also supports large numbers.