UD5 Toolkit
Exclusive Accordion Generator (name=) - Online HTML‑Only
Use the new `name` attribute on <details> to create an exclusive accordion with zero JavaScript. Copy the clean HTML.
CSS‑Only Accordion Builder - Online No JavaScript FAQ
CSS‑Only Accordion Builder
Build a beautiful, SEO‑friendly FAQ accordion using pure HTML & CSS — zero JavaScript required. Uses the native <details> element with full style customization.
Add FAQ Item
Your FAQ Items
3No FAQ items yet. Add one above!
Style Settings
Preset Themes
Accent Color
#4f46e5
Background
#fafbfc
Text Color
Border Color
Icon Style
Border Radius
Live Preview
Generated HTML & CSS
Copy and paste this into your HTML file. No JavaScript needed!
About CSS‑Only Accordions
What is a CSS‑only accordion?
A CSS‑only accordion uses the HTML5 <details> and <summary> elements to create expandable content panels without any JavaScript. It's lightweight, accessible, and SEO‑friendly since all content is in the DOM at page load.
Is it SEO‑friendly?
Yes! Unlike JS‑based accordions that may hide content with display:none, the <details> element keeps all text in the HTML source. Search engines can crawl and index all FAQ content, even when collapsed.
Can I add animations?
Yes — our builder includes a max‑height transition hack. By wrapping content in a div and transitioning max-height from 0 to a large value on details[open], you get a smooth expand/collapse effect in pure CSS.
Browser support?
<details> is supported in all modern browsers: Chrome, Firefox, Safari, Edge (including mobile). It's part of the HTML5 Living Standard. For IE11, a small polyfill may be needed.
HTML Table to CSV Converter - Online Extract Data
Paste an HTML table snippet and instantly get the data as CSV or JSON. Handy for scraping and data migration. Local.
Image Silhouette to clip‑path – Online Polygon Extraction
Trace the edge of an object in an image and generate a CSS clip‑path polygon. For non‑rectangular layouts.
Equine Hoof Angle Checker – Online Visual Reference
Overlay a protractor to understand ideal hoof‑pastern axis. Educational for horse owners.
FedCM Demo - Online Federated Credential Management
Experiment with the Federated Credential Management API. Simulate a sign‑in flow without third‑party cookies. Privacy‑first.
Argon2 Hash Generator - Online Modern Password KDF
Generate Argon2id hashes in the browser using a WASM compilation. Choose memory, iterations, and parallelism. Secure local hashing.
PBKDF2 Key Derivation Demo - Online Password‑Based Key
Derive a strong cryptographic key from a password using PBKDF2 with SHA‑256. Adjust iterations and salt. Educational and test tool.
Image Palette Extractor (Paste) - Online Clipboard Image
Paste an image from your clipboard directly into the page (Ctrl+V) and extract its color palette. No file dialog needed.
Pet Fountain Filter Change Reminder – Online Schedule & Log
Log when you last replaced the filter and get a reminder every 2‑4 weeks. Keep your pet's water fresh.
Common Fossil Identifier – Online By Pattern & Shape
Identify common invertebrate fossils (ammonite, trilobite, brachiopod) from sketches. Amateur paleontology.
TOTP Generator (Offline) - Online Two‑Factor Code
Generate Time‑based One‑Time Passwords locally by entering a base32 secret. Verify your authenticator setup without a phone.
Password Pwned? Checker - Online k‑Anonymity
Check if a password appears in the Have I Been Pwned database using k‑Anonymity. Only the first 5 characters of the hash are sent.
Short‑Term Rental Cleaning Checklist – Online Turnover Tool
Comprehensive room‑by‑room checklist for hosts. Track tasks and timing.
Text to ISO Date Converter - Online Parse Any Date String
Paste a human‑readable date (like 'next Friday' or 'March 5, 2023') and convert it to ISO 8601 format. Quick and tolerant.
WHOIS Domain Lookup - Online Ownership & Expiration Check
Check WHOIS information for any domain: registrar, expiration date, and name servers. Quick and private using public WHOIS data aggregators.
WHOIS Lookup - Online Domain Ownership & Expiration Check
Check WHOIS information for any domain: registrar, expiration date, and name servers. Quick and private using public WHOIS data aggregators.
Hex to Float Converter - Online IEEE 754 Decoder
Enter a hexadecimal string and decode it as a 32‑bit or 64‑bit floating‑point number. Low‑level developer tool.
Decimal to IEEE 754 Binary - Online Float Representation
Enter a decimal number and see its 32‑bit and 64‑bit IEEE 754 representation. Learn sign, exponent, mantissa.
Currency Code to Symbol Converter - Online ISO 4217 Lookup
Enter a three‑letter currency code like USD or EUR and instantly see the corresponding symbol and number of decimals. Quick developer reference.
Even or Odd Binary Checker - Online Least Significant Bit
See how a computer decides even/odd by looking at the least significant bit. Enter decimal or binary.
Extract Email Addresses - Online Email Harvester Tool
Extract all email addresses from a text block using a regex pattern. Deduplicate and sort results. Handy for lead extraction. Data stays on your machine.
Gratitude Tree – Add a Leaf for Every Thankful Thought
Type what you’re thankful for and it appears as a leaf on a bare tree. Over time, the tree fills with colorful gratitude leaves.
FAQ Schema Markup Generator – JSON‑LD for Google
Add question‑answer pairs and instantly get the valid JSON‑LD FAQ structured data. Test it in the preview and paste into your page’s <head>.
Scavenger Hunt List Builder – Online Indoor/Outdoor Clues
Type a list of items to find and generate a printable checklist with checkboxes. Great for parties.
Visual Cron Schedule Builder – Online Next 10 Runs Preview
Build a cron expression using plain English toggles and see its visual timeline. No memorization needed.
Comic Strip Layout Builder – Online Drag Panels
Arrange pre‑drawn comic panels into a strip. Add speech bubbles. Export as image. Fun for kids.
Setlist Builder – Online Drag Songs into Order & Time
Drag songs into a setlist and see total duration. Perfect for planning a concert or DJ set.
One‑Page Resume Builder - Online Simple CV Generator
Fill in a form to generate a clean, ATS‑friendly one‑page resume. Customize sections, colors, and export as print‑ready PDF. Personal data stays in your browser.
Bookmarklet Code Builder - Online Convert JS to Bookmark
Write a JavaScript snippet and get a ready‑to‑drag bookmarklet link. With minification and encoding. Easy browser tools.
CSS Subgrid Layout Builder - Online Align Nested Grids
Design a layout where nested grids share track sizes with their parent via subgrid. Copy the complete CSS.